9 Feb 2020

A06 Réti Opening: 1.Nf3 d5 (1.b3 Nf6 2.Bb2 e6 3.Nf3 d5)

A06 Réti Opening: 1.Nf3 d5 (1.b3 Nf6 2.Bb2 e6 3.Nf3 d5)
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1.b3 Nf6 A01 Nimzo-Larsen Attack: Indian Variation 2.Bb2 e6 3.Nf3 d5 A06 Réti Opening: 1.Nf3 d5 4.d3 Be7 4...c5 5.Nbd2 Nc6 6.e4 Be7 7.g3 0-0 8.Bg2 b6 9.0-0 Bb7 10.Re1 Qc7 11.e5 Nd7 12.Qe2 Rae8 13.Nf1 f6 14.exf6 Bxf6 15.Bxf6 Nxf6 16.Ne5 Nd4 17.Qd1 Nc6 18.Qe2 Nd4 19.Qd1 Tereladze,S (2166)-Gavasheli,A (2190) Konya 2016 1/2-1/2 5.Nbd2 0-0 5...c5 6.e3 Nc6 7.Be2 Bd7 8.0-0 0-0 9.Ne5 Nxe5 10.Bxe5 Bc6 11.Nf3 Nd7 12.Bb2 Bf6 13.d4 Re8 14.Re1 a5 15.Ne5 Qb6 16.Nxd7 Bxd7 17.dxc5 Qxc5 18.Bxf6 gxf6 19.c4 Bc6 20.cxd5 Elias Arguelles,M (1638)-Martin Arranz,L (1714) Barcelona 2017 1/2-1/ 2 (74) 6.e4 6.e3= 6...c5 7.e5N 7.Ne5= 7.c4 b6 8.g3 Bb7 9.Qe2 Na6 10.a3 Nc7 11.Bg2 Nd7 12.0-0 Re8 13.Ne5 f6 14.Nxd7 Qxd7 15.Rad1 f5 16.cxd5 exd5 17.e5 Ne6 18.f4 b5 19.h4 a5 20.Bh3 g6 21.Nf3 a4 Ivanov,V (1968)-Gudkov,G (1940) Petrozavodsk 2013 0-1 7...Nfd7 8.c3 8.g3 8...Nc6 9.d4 cxd4 9...f6! 10.Bb5 fxe5 11.Bxc6 bxc6 12.dxe5 Qc7 10.cxd4 Qb6 10...f6 11.Bd3 f6 11...Re8= 12.0-0 fxe5 13.dxe5 13.Nxe5 is superior. Ndxe5 14.dxe5 13...Nc5= 14.Bb1 14.Bc2 should be considered. 14...Bd7 14...a5= 15.Qc2 15.a3 15...g6 16.h4 16.a3= keeps the balance. 16...Nb4 Black should try 16...Rf4 17.Qc3 Rac8 17...Nca6= 18.Qe3!
18...Bb5 18...Ncd3!= 19.Bd4 19.Bxd3 Qxe3 19...Qa6 19.Rd1 19.a3± 19...Bd3! White is under pressure. 20.Qh6 20.Nd4 20...Bxb1 Better is 20...Rf7! 21.h5 Bxb1 22.Raxb1 Bf8 21.Raxb1 Nxa2? 21...Ncd3 22.Bd4 Qa6 22.Ng5? 22.h5= and White has nothing to worry. gxh5 23.Bd4 22...Bxg5!-+ 23.Qxg5 Nd3 24.Rf1 Nxf2 25.Kh2 Nd3? 25...Rc2-+ 26.Ba3 Rf5 26.Nf3? 26.h5 was necessary. 26...Nxb2 27.Rxb2 Nc3 28.Qh6 Ne4 29.h5 gxh5 30.Qxh5? 30.Rbb1 30...Rf5 31.Qh6 Qc7? 31...Rf7-+ White must now prevent ...Rg7. 32.Rc1 Rxc1 33.Qxc1 Kg7 32.Qxe6+± Rf7 33.Qxd5 Qe7? Wrong is 33...Qc6? 34.Qxf7+! Kxf7 35.Nd4+ Ke7 36.Nxc6+ Rxc6 37.Rf4+- 33...Nf6 34.Qd4 Rd8 34.Qxe4+- Qe6 35.Rff2 Qh6+ 36.Qh4 Qe6 37.Qh5 Rg7 38.Ng5? 38.Nd4+- Qg6 39.Qh3 38...Qxe5+ 39.g3 Qxg5 40.Qxg5 Rxg5 Endgame KRR-KRR 41.Rf3 Rc7 42.Rd2 Rgc5 43.Rf4 Rc2 44.Rxc2 Rxc2+ KR-KR 45.Kh3 Rb2 46.b4 Kg7 47.Kg4 b6 48.Kg5 a5 49.bxa5
49...bxa5 49...Rb5+! 50.Kh4 bxa5 50.Rc4? - 50.Rf5= 50...Rb5+ Black mates. 51.Kf4 Rb4 52.Rxb4 axb4 KPP-KP 53.Ke4 Kg6 54.Kd4 Kg5 55.Kc4 Kg4 56.Kxb4 Kxg3 57.Kc3 h5 58.Kd2 Kg2 59.Ke2 h4 Accuracy: White = 24%, Black = 39%. 0–1
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WhiteEloWBlackEloBRes
Kojjootti1577Vierjoki,T15770–1
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A06 Réti Opening: 1.Nf3 d5 (1.Nf3 d5 2.b3 c5 3.Bb2 Nc6 4.e3 Nf6)

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 d5 2.b3 c5 3.Bb2 Nc6 4.e3 Nf6)
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1.Nf3 d5 2.b3 A06 Nimzo-Larsen Attack: Classical Variation c5 3.Bb2 Nc6 4.e3 Nf6 A06 Réti Opening: 1.Nf3 d5 5.g3 Bg4 5...Qc7 5...g6 6.Bg2 Bg7 7.0-0 0-0 8.d3 Qc7 9.Nbd2 Rd8 10.Qe2 e5 11.e4 d4 12.a4 a6 13.Nc4 Be6 14.Nfd2 b5 15.axb5 axb5 16.Na3 Rab8 17.Rfc1 h5 18.Nf1 Qd7 19.Rd1 h4 20.Bc1 Popchev,M (2268)-Savic,M (2507) Novi Sad 2018 0-1 (33) 6.Bg2 6.h3 should be considered. Bd7 7.Bg2 6...e6N 6...Rc8 7.h3 Bh5 8.0-0 e6 9.d3 Be7 10.Nbd2 0-0 11.Qe2 Qc7 12.e4 Rfe8 13.g4 Bg6 14.Nh4 Qf4 15.Nxg6 hxg6 16.Rfe1 Nd4 17.Qd1 Red8 18.Bxd4 cxd4 19.exd5 Bb4 20.Re2 Nxd5 21.Bxd5 Greenfield,W-Purdy,C Sydney 1934 0-1 (42) 7.h3 Bh5 7...Bxf3 8.Bxf3 Be7 8.0-0 8.Nc3= 8...Bd6 8...Be7 9.Qc1 9.Nc3 keeps the upper hand. 9...0-0 9...h6 10.d4 10.d3= 10...cxd4 10...Bxf3 11.Bxf3 cxd4 11.Nxd4 Rc8 12.Nxc6 Rxc6 13.Qd2 13.Nd2 13...Bg6
13...Ne4!-+ 14.Bxe4 dxe4 14.Rc1 14.c4! 14...Qc8
14...b5! 15.Na3 Rb6 15.c3 15.c4!= 15...Be4 Black should play 15...Ne4 16.Qe2 Rd8 16.Na3 16.Qe1 16...Bxg2 17.Kxg2 Ne4 Keeping White busy. 18.Qd3?
18.Qe2 18...Nxc3? 18...Bxg3!-+ 19.f3 19.fxg3 Qc7 19...Nf2 19.Bxc3? 19.Rxc3= and White has nothing to worry. Rxc3 20.Bxc3 Bxa3 21.b4 19...Bxa3-+ 20.Rc2 20.Qd4 was worth a try. e5 21.Qxe5 20...Rd8 21.Qd4 21.b4 might work better. Bxb4 22.Rac1 21...f6 22.b4 22.Rd1 Rd7 23.Qxa7 22...e5 23.Qxd5+ Rxd5 Accuracy: White = 21%, Black = 23%. 0–1
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WhiteEloWBlackEloBRes
Ballas31551Vierjoki,T17390–1
Kojjootti1549Vierjoki,T15580–1
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A06 Réti Opening: 1.Nf3 d5 (1.b3 d5 2.Bb2 c5 3.e3 Nc6 4.Nf3 Bg4 5.Be2 e6)

A06 Réti Opening: 1.Nf3 d5 (1.b3 d5 2.Bb2 c5 3.e3 Nc6 4.Nf3 Bg4 5.Be2 e6)
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1.b3 d5 A01 Nimzo-Larsen Attack: Classical Variation 2.Bb2 c5 3.e3 Nc6 4.Nf3 Bg4 5.Be2 e6 A06 Réti Opening: 1.Nf3 d5 6.0-0 Nf6 7.Ne5 Better is 7.h3 Bxf3 8.Bxf3 7.d3 Bd6 8.Nbd2 0-0 9.Re1 Re8 10.h3 Bh5 11.e4 Nd7 12.d4 Bxf3 13.Bxf3 Nxd4 14.Bxd4 cxd4 15.exd5 e5 16.Be4 Nc5 17.Qh5 g6 18.Qe2 f5 19.Bd3 e4 20.Bc4 a6 21.a4 Qf6 Zanon,M (1861) -Hessenberger,A (2061) Vienna 2012 0-1 (37) 7...Bxe2 7...Nxe5 feels stronger. 8.Bxe5 Bd6 8.Qxe2= The position is equal. Qb6N 8...Nxe5= 9.Bxe5 Rc8 9...Be7 10.d3 0-0 11.Nd2 Nd7 12.Bg3 f5 13.f4 Bf6 14.Rad1 b5 15.c4 Qa5 16.Nf3 Nb6 17.Be1 Qa6 18.cxb5 Qxb5 19.Rc1 Kh8 20.Bh4 Bxh4 21.Nxh4 a5 22.Qc2 Nd7 23.Nf3 a4 24.Ne5 Palliser,R (2322)-Panchanathan,M (2238) Witley 2000 0-1 (57) 8...Bd6 9.f4 9.Nxc6 bxc6 10.f4 0-0 11.d3 Qe7 12.e4 Bc7 13.e5 Nd7 14.Nd2 a5 15.a4 Rab8 16.Rad1 Nb6 17.Ba3 Nd7 18.Nf3 Bb6 19.Kh1 Rfe8 20.Ng5 h6 21.Nf3 Rec8 22.g4 f6 23.g5 f5 Mendes,R-Prata,J (2064) Caldas de Felgueira 1999 1-0 9...0-0 10.d3 Bxe5 11.fxe5 Nd7 12.d4 Qb6 13.Qf2 Rac8 14.Nd2 Nb4 15.a3 Nxc2 16.Rac1 cxd4 17.Bxd4 Nxd4 18.Rxc8 Nf5 19.Rxf8+ Kxf8 20.g4 Nh6 21.Qf4 Qc7 22.Nf3 Ke7 23.Qg5+ Weck,M (1803)-Viennot,D St Chely d'Aubrac 2006 1-0 (34) 9.d4 9.d3 9...Bd6 9...cxd4= 10.Nxc6 Qxc6 10.dxc5 10.c4 10...Bxc5 11.Nxc6 11.Ng4 11...Qxc6 11...bxc6= 12.c4 Be7 12.Nd2 12.c4! 12...Be7 13.Rfc1 13.c4 13...0-0 14.c4 Qd7 14...Rac8= 15.cxd5 15.Rd1 15...Nxd5 Black should try 15...Rfd8= 16.Nc4 Bf6 17.Bxf6 Nxf6 18.Ne5 18.e4 18...Qd6 19.f4 19.Nc4= Qe7 20.e4 19...Nd5 20.Rd1 20.Rc4= 20...Qb6 20...Rad8 21.Qf3 Qb6 21.Nc4 White should play 21.Rxd5= exd5 22.Nd7 21...Qb4 21...Qc5 22.Rd4 b5 22.Qc2 22.Rd4= 22...Rac8 22...b5 23.e4 Qc5+ 24.Qf2 Qxf2+ 25.Kxf2 Nc3 23.a3 23.Qd2!= keeps the balance. 23...Qc5 White is under strong pressure. 24.Qe4?
24.Qf2 is a better defense. 24...Nc3-+ 25.b4? 25.Qxb7 Nxd1 26.Rxd1 25...Qxc4 Weaker is 25...Nxe4 26.bxc5 Rxc5 27.Nd6 26.Qxb7 Nxd1 27.Rxd1 Qe2 28.Ra1 Rc2 Accuracy: White = 0%, Black = 21%. 28...Qxe3+ - 29.Kf1 Qd3+ 30.Ke1 Rc2 31.Qf3 Qd4 32.h3 Qg1+ 33.Qf1 Qe3+ 34.Kd1 Qd2# 0–1
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WhiteEloWBlackEloBRes
giarenn1093Vierjoki,T15780–1
Kojjootti1549Vierjoki,T15581–0
Kojjootti1549Vierjoki,T15580–1
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A06 Réti Opening: 1.Nf3 d5 (1.b3 Nf6 2.Bb2 e6 3.e3 d5 4.Nf3 Bd6 5.Be2)

A06 Réti Opening: 1.Nf3 d5 (1.b3 Nf6 2.Bb2 e6 3.e3 d5 4.Nf3 Bd6 5.Be2)
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1.b3 Nf6 A01 Nimzo-Larsen Attack: Indian Variation 2.Bb2 e6 3.e3 d5 4.Nf3 Bd6 5.Be2 A06 Réti Opening: 1.Nf3 d5 Nbd7 5...c5 6.a3N 6.c4 c6 6...0-0 7.Nc3 b6 8.Qc2 dxc4 9.bxc4 Bb7 10.Nb5 Be7 11.h4 a6 12.Nc3 Re8 13.h5 Bf8 14.d4 c5 15.Bd3 cxd4 16.Ne4 Bb4+ 17.Ke2 Bxe4 18.Bxe4 Nc5 19.a3 Ncxe4 20.axb4 d3+ 21.Qxd3 Rethy,P-Lundin,E Munich 1941 0-1 7.0-0 0-0 8.d3 Re8 9.Nc3 Nf8 10.e4 dxe4 11.Nxe4 Be7 12.Ne5 Ng6 13.Nxg6 hxg6 14.Ng5 Qa5 15.f4 Ba3 16.Bxa3 Qxa3 17.Qd2 Qd6 18.Nf3 c5 19.Rad1 Rd8 20.d4 1/2-1/2 (20) Ueti,S (2234)-Van Riemsdijk,H (2396) Santos 2008 6.0-0 Qe7 7.c4 0-0 8.Nc3 a6 9.Qc2 Ba3 10.Bxa3 Qxa3 11.cxd5 exd5 12.d4 Re8 13.Rac1 c6 14.Bd3 Nf8 15.Na4 Qd6 16.Nc5 Re7 17.h3 g6 18.Ne5 N6d7 19.Nexd7 Nxd7 20.b4 Nf8 David,M-Veresov,G Leningrad 1938 1/2-1/2 (71) 6.d3 0-0 7.Nbd2 b6 7...e5 8.c4 c5 9.cxd5 Nxd5 10.Nc4 Bc7 11.Nfxe5 Nxe5 12.Bxe5 Bxe5 13.Nxe5 Qg5 14.Ng4 Nc3 15.h4 Qg6 16.Ne5 Qxg2 17.Bf3 Qxh1+ 18.Bxh1 Nxd1 19.Kxd1 Re8 20.Nf3 Bf5 21.Ke2 Rad8 22.Ne1 Didiliuc,D (1573)-Olea,L (1926) Baile Olanesti 2013 0-1 (38) 8.0-0 Bb7 9.c4 c5 10.Qc2 Rc8 11.a3 Qe7 12.Rfe1 e5 13.cxd5 Nxd5 14.Nc4 Bb8 15.e4 Nf4 16.Bf1 Rfd8 17.Ne3 g6 18.Bc1 Kh8 19.Qb1 Nf8 20.a4 Ba6 Tuertmann,D (1846)-Wetjen,A (1998) Binz 2014 1-0 (103) 6...0-0 6...e5 7.d4 7.c4= 7...c5 7...Re8 8.c3 8.dxc5 Nxc5 9.Nbd2 8...Ne4 8...Qe7 9.Nbd2 9.dxc5 Bxc5 10.Nbd2 9...Ndf6 9...cxd4 10.Nxe4 dxe4 11.Nxd4 Bb8 10.h3 10.Nxe4= dxe4 11.Ne5 10...b6 10...cxd4 should be considered. 11.Nxe4 Nxe4 12.Qxd4 Be7 11.Qc2 11.dxc5= bxc5 12.c4 11...Bb7 11...cxd4 is superior. 12.cxd4 Bb7 12.dxc5= Nxc5 Black should play 12...bxc5 13.c4 Qc7 13.h4 13.0-0= 13...Rc8 13...Qe7 14.0-0 Rac8 14.Ng5 14.c4 14...e5 14...Qe7-+ is more deadly. 15.c4 e5 15.b4 Ncd7 16.Qb3 16.e4 16...Qe7 16...Bb8-+ 17.Ngf3 Ng4 17.Kf1 17.Ngf3 17...e4 18.Nh3 18.Qd1 18...Rc7 18...Ne5-+ 19.Qc2 Rfe8 19.g3? 19.Qd1 19...Rfc8 19...Ne5 20.Nf4 Nd3! 21.Nxd3 exd3 20.Nf4? 20.Qd1 20...Ne5-+ 21.Rd1
21...Nc4? 21...Nd3!-+ and Black stays clearly on top. ...d4! is the strong threat. 22.Nxd3 22.Bxd3 exd3 22...exd3 22.Nb1? 22.Nxc4 dxc4 23.Qc2 22...Be5 23.Ba1 b5 24.Kg2 a6 25.a4 Bc6 26.a5 Bb7 27.Qa2?
27.Na3 27...Qe8? 27...d4!-+ has better winning chances. 28.Bxc4 28.cxd4 Bxf4 28...Rxc4 28.Bxc4? 28.Nd2 28...dxc4 Weaker is 28...Rxc4 29.Nd2 28...bxc4 29.Ne2 29.Ne2 Rd8 30.Nd4 Rcd7 31.Qe2 Bb8 32.Nd2 Ba7 33.Bb2 33.h5 was called for. Bxd4 34.cxd4 33...Qe5 34.Nf1 Nd5 35.Rc1 Rd6 36.Nh2 f5 37.Kf1 Nf6 38.Rg1 Rf8 38...Bxd4? 39.exd4 Qe6 40.Ke1-+ 39.Rc2 Bc8 40.Ke1 Qe7 41.Kd1 Nd5 42.Kc1? 42.Rd2 42...Rg6 42...Bxd4 43.exd4 f4 44.gxf4 Nxf4 43.h5 Rh6 44.Kb1 Qg5 45.Nf1? 45.Rd2 Bb7 46.Nf1 45...Bb8 46.Rh1 Nf6 47.f4 exf3?? 47...Qg4!-+ avoids the disaster. 48.Qxg4 Nxg4 48.Qxf3?? 48.Nxf3+- was the only winning move. Qg4 49.Rh4 48...Rxh5 49.Rxh5 Qxh5 49...Nxh5? 50.Qd5+ Kh8 51.e4-+ 50.Qc6 Qe8 51.Qf3 Qe4 52.Qe2 Bb7 53.Ka2 Ng4 54.Rd2 Re8 55.Bc1 Nxe3? 55...g6-+ 56.Bb2 Be5 56.Nxe3 Qxe3 57.Qxe3 Rxe3 58.Nxf5 Re8 58...Rd3 Hoping for ...Rxd2+. 59.Re2 Kf8 59.Rd7
59.Nd6= remains equal. Bxd6 60.Rxd6 59...Be4 Better is 59...Bc8! 60.Rxg7+ Kf8 60.Nxg7= Rf8 White must now prevent . ..Be5. 61.Nh5? 61.Ne6= and White is okay. Re8 62.Nc7 Bxc7 63.Rxc7 61...Rf2+-+ 62.Ka3 aiming for Rd8+. Bb1 63.Bb2 And now Rd8+ would win. Be5 ( -> ...Bxc3!) 64.Ra7? -
64.Rd1-+ Bd3
65.Nf4! Bxf4 66.gxf4 64...Bxc3! Accuracy: White = 18%, Black = 28%. 0–1
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RT1857Vierjoki,T18520–1
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A06 Réti Opening: 1.Nf3 d5 (1.Nf3 d5 2.c3)

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 d5 2.c3)
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1.Nf3 d5 A06 Réti Opening 2.c3 A06 Réti Opening: 1.Nf3 d5 Nf6 3.g3 c5 3...Bf5 4.d3 4.Bg2 e6 5.0-0 Be7 6.d3 h6 7.Nbd2 0-0 8.c4 c6 9.b3 Nbd7 10.Bb2 Bh7 11.a3 a5 12.Ra2 b5 13.cxb5 cxb5 14.Qa1 Qb6 15.Ne5 Nxe5 16.Bxe5 Rfc8 17.e4 Rc6 18.Bd4 Qc7 Soham,D (2029)-Mullick,R (1775) Mumbai 2018 0-1 (52) 4...Nbd7 5.Na3 e5 6.Nc2 h6 7.Bg2 Bd6 8.0-0 0-0 9.Nd2 c6 10.e4 Bg4 11.Qe1 Re8 12.f3 Bh5 13.b4 a5 14.Qf2 axb4 15.cxb4 Ra4 16.a3 Bc7 17.Nb3 Qe7 18.Be3 Yin,S (1932)-Pribyl,J (2367) Schwäbisch Gmünd 2008 0-1 4.Bg2 Nc6 5.d3 e5N 5...Bg4 6.Nbd2 e5 7.Qa4 Qd7 8.h3 Bh5 9.a3 Be7 10.b4 e4 11.dxe4 dxe4 12.Ng5 e3 13.Nc4 exf2+ 14.Kxf2 0-0 15.Bf4 h6 16.Rad1 Qf5 17.Ne3 Qg6 18.Nf3 Ne4+ 19.Kf1 Nxc3 20.Qb3 Fleischmann,K (1913)-Figura, A (1494) Berlin 2000 0-1 (46) 6.Nbd2 6.0-0= keeps the balance. 6...Bf5 Better is 6...Bd6 7.0-0 7.e4 dxe4 8.dxe4 7...Be7 7...Qd7 is more appropriate. 8.Nh4 8.e4= dxe4 9.dxe4 8...Be6 8...Bg4 9.Re1 9.e4!= 9...0-0 9...g5 10.Nhf3 h6 10.Nhf3 10.e4= 10...Nd7 10...h6 11.e4 d4 11.e4
11.b3 11...Qc7? 11...d4!-+ 12.a4 a6 12.exd5 Bxd5 13.c4 13.Nxe5 Bxg2 14.Nxd7 Qxd7 15.Kxg2 13...Be6 14.Ne4 f6 14...h6 15.Nc3 15.Be3= remains equal. 15...Rad8 16.Nd5 Bxd5 Black should play 16...Qd6 17.cxd5 Nb4 17...Nd4= 18.Nh4 Nb6
Black should try 18...g6 19.Nf5? Only move: 19.Be4!+- 19...N6xd5? 19...Rfe8 stays ahead. 20.Nxe7+?? 20.a3+- and all is fine. 20...Nxe7-+ But not 20...Qxe7 21.a3 21.f3? 21.Bf1 21...Rxd3 22.Bf1 22.Qe2 Nf5 23.Rd1 Rxd1+ 24.Qxd1 22...Rxd1 Accuracy: White = 17%, Black = 5%. 0–1
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basia1418Vierjoki,T17080–1
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A06 Réti Opening: 1.Nf3 d5 (1.b3 d5 2.Bb2 c5 3.e3 Nc6 4.Nf3 Bg4 5.Bb5)

A06 Réti Opening: 1.Nf3 d5 (1.b3 d5 2.Bb2 c5 3.e3 Nc6 4.Nf3 Bg4 5.Bb5)
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1.b3 d5 A01 Nimzo-Larsen Attack: Classical Variation 2.Bb2 c5 3.e3 Nc6 4.Nf3 Bg4 5.Bb5 A06 Réti Opening: 1.Nf3 d5 a6 5...e6= 6.Bxc6+± bxc6 7.c4N 7.h3± Bxf3 7...Bh5 8.g4 Bg6 9.Ne5 f6 10.Nxg6 hxg6 11.Qe2 e5 12.Nc3 Bd6 13.d3 Ne7 14.0-0-0 g5 15.Rdf1 Kf7 16.Kb1 Ng6 17.f3 Qe7 18.Na4 Rab8 19.Qd2 Rb5 20.Nc3 Rbb8 21.Ne2 Qc7 22.Qc3 Smajlovic,S (1723)-Dugonjic,D (2040) Bosna 2017 1-0 (46) 8.Qxf3 e6 9.0-0 Nf6 10.d3 Be7 11.Rd1 0-0 12.c4 a5 13.Nc3 Qc7 14.Rac1 Nd7 15.Na4 f5 16.cxd5 cxd5 17.d4 Rab8 18.dxc5 Bf6 19.c6 Ne5 20.Bxe5 Bxe5 21.Qe2 f4 22.exf4 Bxf4 23.Qxe6+ Salgado Lopez,I (2644)-Amer,S (2103) Riadh 2017 1-0 (33) 7.0-0 e6 8.d3 Nf6 9.Nbd2 Bd6 10.e4 Be7 11.Re1 0-0 12.Nf1 Qc7 13.h3 Bh5 14.Ng3 Bg6 15.Ne5 Nd7 16.Nxg6 hxg6 17.Qd2 Bf6 18.Bxf6 Nxf6 19.Qe3 d4 20.Qd2 e5 21.Rf1 Qd6 Albuquerque,W (2181)-Lima, A (1849) Fortaleza 2018 1-0 (42) 7...e6 7...Nf6= should be considered. 8.h3 8.d3 8...Bf5 8...Bh5= 9.d3 9.0-0± 9...Nf6= 10.Nbd2 White should try 10.Nh4± 10...Be7 10...Bxd3= 11.Ne5 Be4 11.0-0? 11.Ne5 keeps the upper hand. 11...0-0? 11...Bxd3 12.Re1 Bg6 12.Nh4? 12.Ne5 12...Bg6? 12...Bxd3-+ 13.Re1 Ne4 13.Nxg6± fxg6 13...hxg6= keeps the balance. 14.Nf3 Bd6 14.Nf3 14.Qe2± 14...Nd7 14...a5 15.d4 White should play 15.Rc1 15...cxd4? 15...Nf6± 16.Nxd4+- Qc7? 16...Qc8 is a better defense. 17.Nxe6 Rf5 17.Nxe6 Qd6 18.Nxf8 Rxf8 19.Qd4 Bf6 20.Qd2 Be7 21.cxd5 cxd5 22.Rad1 Nb6 23.Bd4 Nd7 24.Qe2 Qe6 25.Rc1 Bf6 26.Bxf6 Nxf6 27.Rc7 Ne4 28.Qg4 Qxg4 29.hxg4 Endgame KRR-KRN Nf6 30.f3 Ra8 31.Rd1 a5 32.g5 Nh5 33.Kf2 a4 34.b4 a3 35.Rxd5 Rb8 36.b5 Kf8
37.Rc3 37.b6! h6 37...Rxb6 38.Rd8# 38.b7 hxg5 39.Rc8+ Kf7 40.Rxb8 g4
41.Rf8+! Ke6 42.Rc5 37...Ra8 38.b6 Ke7 39.b7 Rb8 40.Rb5 Kd6 41.Rxa3 Kc6 42.Rbb3 Rxb7 43.Rxb7 Kxb7 KR-KN 44.Rd3 Kb6 45.a4 Ka5 46.Ra3 Kb4 47.Ra1 Ka5 48.Ke2 Ka6 49.Kd3 Ka5 50.Kc4 Ng3 51.e4 Ne2 52.e5 White threatens e6 and mate. Nf4 53.Kc5 Ne6+ 54.Kd6 Nxg5 White mates. 55.e6 Nxe6 56.Kxe6 g5 57.Kf7 h5 58.Kxg7 g4 59.fxg4 hxg4 60.Kg6 Accuracy: White = 44%, Black = 12%. 1–0
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Baldassarre1439Vierjoki,T14031–0
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A06 Réti Opening: 1.Nf3 d5 (1.Nf3 c5 2.b3 Nc6 3.Bb2 d5 4.e3 e6)

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 c5 2.b3 Nc6 3.Bb2 d5 4.e3 e6)
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1.Nf3 c5 A04 Zukertort Opening: Sicilian Invitation 2.b3 Nc6 3.Bb2 d5 4.e3 e6 A06 Réti Opening: 1.Nf3 d5 5.Ne5 5.Be2 Nf6 6.0-0 Be7 7.d3 0-0 8.Nbd2 b6 9.c4 Bb7 10.Qc2 Re8 11.Rac1 Bf8 12.cxd5 exd5 13.Rfd1 d4 14.e4 Nh5 15.Re1 Nf4 16.Bf1 Qd7 17.a3 Rad8 18.Qd1 Qg4 19.Kh1 Rd6 Lupu,M (2435) -Dohl,A (2195) Cappelle la Grande 1993 0-1 (54) 5...Nxe5N 5...Nge7 5...Nf6 6.Nxc6 bxc6 7.Be2 Be7 8.0-0 d4 9.Na3 0-0 10.Nc4 Qd6 1-0 (10) Canongia Costa,L-Lagoa Labrador,F Orense 2000 6.Bxe5= Bd7 6...Nf6 7.c4 7.Bb2= 7...Nf6 7...Bc6 8.Nc3 The position is equal. Bc6 9.cxd5 9.Nb5= 9...Nxd5 10.Bb5 10.Qh5= 10...Qd7 10...Bxb5 11.Nxb5 Qd7 11.Bxc6= Qxc6 12.0-0 f6 12...Bd6= 13.Bxd6 Qxd6 13.Bg3 13.Nxd5 Qxd5 14.Bb2 13...Rd8 13...Nxc3= 14.dxc3 h5 14.Ne2 14.Qe2 14...Bd6 14...Kf7 15.Rc1 b5?
15...Be7= and Black stays safe. 16.Nd4!+- Qd7 16...cxd4 17.Rxc6 17.Ne2? 17.Bxd6+- Qxd6 18.Nxb5 17...Nb4 17...e5= keeps the balance. 18.a3 Better is 18.Bxd6± Qxd6 19.d4 18...Nd3 Black fights for an advantage. 19.Rc2 19.Rc3= Bxg3 20.hxg3 19...0-0 19...Be7 20.f4? 20.Bxd6!= Qxd6 21.Nc1 20...Rc8 20...Be7-+ 21.Qb1 e5 21.Nc1 c4 22.bxc4 bxc4 23.Rc3 Be7 23...Nb2 24.Qc2 Qb5 24.Qe2?
24.Qc2= and White is okay. 24...Rfd8!-+ 25.e4? 25.Bh4 keeps fighting. 25...Bc5+ 26.Kh1 Bd4 27.Rxd3? 27.Rc2 Bb2 28.Na2 27...cxd3 28.Nxd3 Bb6 29.Rf3 Qxd3? Black should try 29...Qd4-+ 30.Bf2 Qa1+ 31.Ne1 Rc1 30.Rxd3= Rxd3 31.Qe1? 31.Be1= Rxa3 32.g4 31...Rc2-+ Black is clearly winning. 32.h3 Rcxd2 33.Kh2 Rd1 34.Qe2 Bg1+ Accuracy: White = 18%, Black = 20%. 0–1
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rontifrans1746Vierjoki,T15360–1
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A06 Réti Opening: 1.Nf3 d5 (1.Nf3 c5 2.e3 d5 3.b3 Nc6 4.Bb5 Nf6 5.Bb2 e6)

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 c5 2.e3 d5 3.b3 Nc6 4.Bb5 Nf6 5.Bb2 e6)
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1.Nf3 1.b3 Nf6 2.Bb2 c5 3.Nf3 Nc6 4.e3 d5 1-0 (60) Turner,J (2255) -Doring,R (2145) Klatovy 2000 1...c5 A04 Zukertort Opening: Sicilian Invitation 1...d5 2.e3 0-1 (36) Tereba,R-Vanek,K Pardubice 1923 1...Nf6 2.b3 d5 3.Bb2 e6 4.e3 c5 5.Bb5+ 0-1 (30) Stangl,H (1631)-Nagy,L (1820) Austria 2017 2.e3 d5 3.b3 Nc6 4.Bb5 Nf6 5.Bb2 e6 A06 Réti Opening: 1.Nf3 d5 5...Bd7= 6.Bxc6+ White should try 6.0-0 6...bxc6= 7.Ne5 7.0-0 7...Qd6N 7...Bd6= 8.0-0 8.f4 Qc7 9.0-0 Ba6 10.d3 0-0-0 11.Qe2 h5 12.c4 Ng8 13.Nd2 f6 14.Nef3 Nh6 15.b4 cxb4 16.Nb3 Rhe8 17.c5 Bf8 18.Rfd1 e5 19.fxe5 fxe5 20.Qd2 e4 21.dxe4 dxe4 22.Nfd4 Ng4 Gratsianov,I (1906)-Abramov,V (2263) St Petersburg 2005 0-1 (41) 8...Qb6 9.d3 a5 10.Nd2 a4 11.Qe2 a3 12.Bc3 Ba6 13.Rab1 Rd8 14.f4 Qc7 15.Qe1 0-0 16.Ndf3 Ra8 17.Rd1 Ne8 18.Ba5 Qc8 19.c4 f6 20.Ng4 e5 21.fxe5 Qxg4 22.exd6 Nxd6 Turner,J (2255)-Doring,R (2145) Klatovy 2000 1-0 (60) 7...Qc7 8.f4 8.d3 Bd6 9.f4 Bb7 10.Nd2 0-0-0 11.Ndf3 h6 12.Qe2 Ne8 13.h4 f6 14.Ng6 Rg8 15.h5 Ba6 16.0-0 Qb6 17.c4 Kb8 18.d4 Nc7 19.dxc5 Bxc5 20.Bd4 Rge8 21.Rfe1 Ka8 22.Qc2 Bxd4 Stangl,H (1631)-Nagy,L (1820) Austria 2017 0-1 8...Rb8 9.d3 Bd6 10.Nd2 0-0 11.0-0 Ne8 12.Qh5 f6 13.Nef3 Qf7 14.Qxf7+ Rxf7 15.g3 Ba6 16.c4 Bc7 17.Ba3 Bb6 18.Nb1 Nd6 19.Nbd2 Nf5 20.Rfe1 Rd7 21.g4 Nh6 22.h3 Tereba,R-Vanek,K Pardubice 1923 0-1 (36) 8.f4 8.d3± 8...Be7 8...Qc7 9.0-0 9.d3± 9...0-0 10.d3 10.Rf3± 10...Nd7 10...Ne8 11.Nxd7 Qxd7 12.Qg4 12.Nd2± 12...d4 Black should play 12...f6! 13.e4 13.Qg3± 13...Bf6 13...f5 14.Qe2 fxe4 14.e5 White has strong attack. 14.Nd2+- 14...Be7 15.Nd2 Qd5 15...c4± 16.Ne4+- f6 17.exf6 Bxf6 18.Nxf6+ Better is 18.Rae1+- 18...Rxf6± 19.c4 19.Rae1+- 19...Rg6?
19...Qd6 20.Qxg6+- Not 20.cxd5 Rxg4 21.dxc6 Ba6+- 20...hxg6 21.cxd5 cxd5 22.Rac1 Ba6 23.Rf3 Rc8 24.Ba3 c4 25.dxc4 dxc4 26.bxc4 Kf7 27.c5 Kf6 28.g4 Bb7 29.Rd3 Rd8 30.c6 Ba6 31.Rd2 d3 32.c7 Rc8 33.Rc6 Bb5 34.Rc5 a6 35.g5+ Kf7 36.Rc3 Ke8 37.Bd6 Kd7 38.Be5 Ke7 39.Bxg7 Kf7 40.Be5 Ke7 41.a4! Bxa4 42.Rdxd3 Bb5 43.Rh3 Be8 44.Rh7+ Bf7 45.Bf6+ Ke8 46.Rh8+ Kd7 47.Rxc8 Kxc8 48.Bd8 Be8 49.Ra3 Bb5 50.Kf2 Kb7 51.Ke3 Bd7 52.Kd4 Kb6 53.Ke5 Kb5 54.Kf6 a5 55.Kxg6 55.Rxa5+! Kc6 55...Kxa5 56.c8Q+ 56.Ra8 Kd5 57.Ke7 Bc6 58.Ra5+ Ke4 59.c8Q Ke3 60.Qxc6 55...Kb4 56.Ra1 White mates. a4 57.Be7+ Kb3 58.Rc1 Bc8 59.h4 Kb2 60.Rc4 Kb3 61.Rb4+ Kc3 62.Rxa4 Bd7 63.Ra8 Kd4 64.c8Q Bxc8 65.Rxc8 Ke4 66.Bd6 Kd5 67.Be5 Ke4 68.Kf6 Kd5 69.h5 Ke4 70.Rd8 Kf3 71.Kxe6 Kg4 72.h6 Kf3 73.h7 Ke3 74.h8Q Ke4 75.Qh7+ Ke3 76.Qd3+ Kf2 77.Bd4+ Ke1 78.Bc3+ Kf2 79.Qc2+ Kg3 80.f5 Kg4 81.g6 Kf3 82.Rd3+ Kf4 83.Qf2+ Kg5 84.Bf6+ Kh5 85.Rh3+ Kg4 86.Qg3# Accuracy: White = 25%, Black = 16%. 1–0
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Burghard Meyer1655Vierjoki,T17191–0
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A06 Réti Opening: 1.Nf3 d5 (1.Nf3 c5 2.b3 d5 3.Bb2)

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 c5 2.b3 d5 3.Bb2)
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1.Nf3 c5 A04 Zukertort Opening: Sicilian Invitation 2.b3 d5 3.Bb2 A06 Réti Opening: 1.Nf3 d5 Nc6 4.d4 Qa5+N 4...Nf6 5.Nbd2 5.g3 Bf5 6.Bg2 e6 7.0-0 Rc8 8.Nbd2 cxd4 9.Bxd4 Nxd4 10.Nxd4 Bg6 11.c4 Bc5 12.N4f3 0-0 13.Ne5 Bf5 14.Ndf3 h6 15.Rc1 Ba3 16.Rc3 Bb2 17.Re3 d4 18.Rd3 Bxd3 19.Nxd3 Bc3 Fromm,J (1700)-Rothenberg,J (1834) Willingen 2018 0-1 (45) 5...Bf5 6.dxc5 e6 7.e3 Bxc5 8.a3 0-0 9.b4 Be7 10.Bd3 Ne4 11.Bxe4 dxe4 12.Nd4 Nxd4 13.Bxd4 a5 14.0-0 axb4 15.axb4 Bxb4 16.Rb1 Bxd2 17.Qxd2 e5 18.Bc3 Qxd2 19.Bxd2 Nimzowitsch,A-Tartakower,S Baden-Baden 1925 0-1 (41) 4...cxd4 5.Nxd4 Nf6 6.g3 6.e3 e6 7.Be2 Bb4+ 8.c3 Bd6 9.0-0 0-0 10.c4 Ne5 11.Nd2 Bd7 12.cxd5 exd5 13.Nb5 Bb8 14.Ba3 Re8 15.Nd6 Re6 16.Nxb7 Qc7 17.Nc5 Nc4 18.Nf3 Nxa3 19.Nxe6 fxe6 20.Qd2 Qb6 Slonim,S-Verlinsky,B Moscow 1928 0-1 (37) 6...e6 7.Bg2 Bb4+ 8.c3 Bd6 9.0-0 0-0 10.Nd2 e5 11.Nb5 Bc5 12.c4 d4 13.Ne4 Nxe4 14.Bxe4 Bh3 15.Bg2 Bxg2 16.Kxg2 Qe7 17.a4 a6 18.Na3 Rad8 19.Nc2 Lorenc,O (2111)-Simacek,P (2513) Litomysl 2009 0-1 (33) 5.Qd2 Nb4?
5...cxd4= and Black is okay. 6.Nxd4 Bd7 6.Na3?
Better is 6.Bc3!+- 6...cxd4! Strongly threatening ...Nf6. 7.Nxd4 7.e3 was worth a try. 7...e5-+ 8.c3? 8.Nf3 is tougher. Nf6 9.c3 8...exd4 Black is clearly winning. 9.cxb4 9.Qxd4 Nc6 10.Qe3+ Be6 11.Nc2 9...Bxb4 10.Rd1 Nf6 11.e3 Bxd2+ 12.Rxd2 Ne4 13.Bc1 Bd7 14.Ke2 Nxd2 15.Bxd2 Qxa3 0–1
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Vierjoki,T-Tasha-0–1
Kojjootti1549Vierjoki,T15580–1
Kojjootti1549Vierjoki,T15580–1
Kojjootti1549Vierjoki,T15581–0
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A06 Réti Opening 1.Nf3 d5 (1.Nf3 c5 2.b3 d5 3.Bb2 Nc6 4.e3 Bg4 5.Be2)

A06 Réti Opening 1.Nf3 d5 (1.Nf3 c5 2.b3 d5 3.Bb2 Nc6 4.e3 Bg4 5.Be2)
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1.Nf3 c5 A04 Zukertort Opening: Sicilian Invitation 2.b3 d5 3.Bb2 Nc6 4.e3 Bg4 5.Be2 A06 Réti Opening 1.Nf3 d5 c4N
5...e6= 5...Qc7 6.d4 cxd4 7.exd4 e6 8.0-0 Bd6 9.h3 Bxf3 10.Bxf3 Nf6 11.c4 dxc4 12.bxc4 0-0 13.Nc3 Rfd8 14.Nb5 Qe7 15.Qe2 Bb8 16.d5 exd5 17.Qxe7 Nxe7 18.Bxf6 gxf6 19.cxd5 Be5 20.Rab1 Nimzowitsch,A-Tartakower,S Copenhagen 1923 1-0 (45) 5...f6 6.d4 e6 7.0-0 Bd6 8.Nbd2 Nge7 9.c4 0-0 10.Re1 Re8 11.a3 cxd4 12.exd4 Bf4 13.h3 Bh5 14.b4 dxc4 15.Bxc4 Nd5 16.Qb3 Bf7 17.Re4 Bxd2 18.Nxd2 a6 19.Rae1 b5 20.Bxd5 Stein,B (2360) -Kuczynski,R (2470) Slupsk 1987 1/2-1/2 5...Bxf3 6.Bxf3 e6 6...e5 7.0-0 Nf6 8.d3 Be7 9.Nd2 0-0 10.a3 b5 11.c4 bxc4 12.bxc4 Rb8 13.Qc2 Re8 14.Rab1 Qd7 15.cxd5 Nxd5 16.Nc4 Bf6 17.Rfd1 Nb6 18.Nd2 Rec8 19.h3 Qe7 20.Ne4 Nd7 21.Nc3 Solinski,M-Buchmann,N Germany 1993 1-0 (41) 7.d4 cxd4 8.Bxd4 Nxd4 9.Qxd4 Qa5+ 10.Kd1 Nf6 11.a3 Qc7 12.Qa4+ Nd7 13.Ra2 Bd6 14.e4 dxe4 15.Qxe4 Nc5 16.Qd4 Rd8 17.Qg4 0-0 18.Ke2 Qd7 19.Rd1 Qb5+ 20.Ke1 Crahan, A (1610)-Derian,E (1870) Bretagne 2001 0-1 (58) 6.bxc4+- Nf6 6...dxc4 might work better. 7.Na3 7.Bxc4 Nf6± 7...c3 7.Bxf6 7.cxd5 Qxd5 8.h3 7...exf6 7...gxf6 8.cxd5 Qxd5 8.cxd5 White is clearly better. Nb4? 8...Qxd5 9.Nc3 Qd7 9.Nc3 9.c4 9...Bc5? 9...Nxd5 was called for. 10.Nxd5 Qxd5 10.d4 10.h3 10...Qa5? 10...Be7 is more resistant. 11.Nd2 Bxe2 12.Nxe2 12.Kxe2 Rc8 12...Qxd5 11.0-0 Bd6 11...Be7 keeps fighting. 12.Bb5+ Kd8 12.Ne4 Qxd5 13.Nxd6+ Qxd6 14.c4 Na6 14...0-0 15.c5 Qd7 15.Rb1 Qc7 16.c5 0-0 17.Bxa6 bxa6 18.h3 Bxh3? 18...Be6 19.Qc2 Rfe8 19.gxh3 Rfe8 20.Nd2 Rac8 21.Qf3 Qa5 22.Nc4 Qxa2 23.Nd6 Qc2 24.Nxc8 Rxc8 25.Qb7
25...Qg6+ 26.Qg2 h5 27.Qxg6 fxg6 28.Ra1 g5 29.Rxa6 g4 30.hxg4 hxg4 31.Rxa7 f5 32.Rc1 White mates. Re8 33.c6 g3 34.Kg2 Rc8 35.Kxg3 g5 36.c7 f4+ 37.Kg2 Kf7 38.Rb7 Ke7 39.Rb8 Kd7 40.Rxc8 Kxc8 41.exf4 gxf4 Endgame KR-KP 42.Kf3 Kd7 43.Kxf4 KR-K Kc8 44.Ke5 Kb7 45.c8Q+ Ka7 46.Rc7+ Kb6 47.Qb7+ Ka5 48.Rc1 Ka4 49.Ra1# Accuracy: White = 42%, Black = 3%. 1–0
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Vierjoki,T-Tasha-1–0
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8 Feb 2020

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 d5 2.b3 Nf6 3.Bb2 e6 4.e3 c5 5.Bb5+ Bd7 6.Bxd7+)

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 d5 2.b3 Nf6 3.Bb2 e6 4.e3 c5 5.Bb5+ Bd7 6.Bxd7+)
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1.Nf3 d5 2.b3 A06 Nimzo-Larsen Attack: Classical Variation Nf6 3.Bb2 e6 4.e3 c5 5.Bb5+ Bd7 6.Bxd7+ A06 Réti Opening: 1.Nf3 d5 White should play 6.Be2 6...Nbxd7 6...Qxd7 7.Ne5 Qd8 7.Ng5N 7.0-0 Bd6 7...Be7 8.c4 0-0 8...Rc8 9.d3 0-0 10.Ne5 Nxe5 11.Bxe5 d4 12.e4 Nd7 13.Bg3 e5 14.f4 Bh4 15.Qg4 Bxg3 16.Qxg3 f6 17.Nd2 Qe7 18.Nf3 exf4 19.Qxf4 Ne5 20.Nxe5 fxe5 21.Qg4 Rxf1+ 22.Rxf1 Rf8 23.Rxf8+ De Vigil,M-Bloch Nakkerud, R Buenos Aires 1939 1/2-1/2 9.Nc3 9.d4 Rc8 10.cxd5 Nxd5 11.e4 N5f6 12.Nc3 cxd4 13.Qxd4 Nc5 14.Rfd1 Qxd4 15.Rxd4 Rfd8 16.Rad1 Rxd4 17.Rxd4 Rd8 18.e5 Rxd4 19.Nxd4 Nfd7 20.Nf3 Nd3 21.Ba1 N3xe5 22.Nxe5 Nxe5 23.Nb5 Nc6 Habitzreiter,C (1815)-Monteiro,D (1467) Caioba 2018 1/2-1/2 (41) 9...dxc4 10.bxc4 Qc7 11.Qe2 Rac8 12.d3 Rfd8 13.Rfd1 Ne8 14.Rab1 Bf6 15.Nb5 Qb8 16.Bxf6 Ndxf6 17.Rb3 Nd6 18.Rdb1 Nxb5 19.Rxb5 b6 20.a4 Qd6 21.Ne1 Rb8 22.a5 Andersson,U (2535)-Huguet,B (2255) Las Palmas 1972 1-0 (42) 8.d3 8.c4 0-0 9.Nc3 Rc8 10.d3 a6 11.Qd2 Bb8 12.Rac1 Qc7 13.g3 Qc6 14.Qe2 b5 15.cxd5 exd5 16.Nh4 Rfe8 17.Nd1 Qe6 18.Re1 Qh3 19.Qf1 Qxf1+ 20.Kxf1 Ng4 21.Nf3 Nde5 22.Nxe5 Nxe5 Honfi,K-Kluger,G Budapest 1968 1/2-1/2 (60) 8...Qc7 9.Nc3 a6 10.e4 0-0 11.Re1 d4 12.Ne2 Rad8 13.Bc1 h6 14.g3 Kh7 15.Bf4 e5 16.Bd2 b5 17.c4 Ng8 18.Nh4 Ne7 19.g4 g6 20.Ng3 Ng8 21.Ng2 f6 22.h4 Tartakower,S-Nimzowitsch,A Dresden 1926 0-1 (58) 7...Be7 7...Bd6 8.Nxf7?
8.Nf3= 8...Kxf7-+ Black is winning. 9.Nc3 d4 10.Ne4? 10.Ne2 10...dxe3? 10...Nxe4 11.exd4 cxd4 12.Bxd4 Ndf6 11.fxe3? 11.Ng5+ Kg8 12.dxe3 11...Qc7?
11...Nxe4 12.Qf3+ Nef6 12.Nxf6 12.Ng5+ was necessary. Kg8 13.Qf3 12...Nxf6 13.Qf3 Qc6 14.Qxc6 bxc6 15.Rf1 Rhd8 16.g3 Rd7 17.Bxf6 gxf6 18.Rd1 Rg8 19.c3 h5 20.Rc1 Rgd8 21.b4 21.Rf2 21...Rxd2 22.Rb1 Rxa2 23.h3 Ra3 24.bxc5 Bxc5 25.Rf4 Rxc3 26.Kf1 Rxe3 27.g4 hxg4 28.hxg4 Rg3 29.Rb7+ Kg6 30.g5 Rxg5 31.Rf3 Rd1+ 32.Ke2 Rgg1 33.Rc3 Rc1 34.Rxc1 Rxc1 Endgame KRB-KR 35.Rb8 Rc3 Black mates. 36.Rg8+ Kf5 37.Rh8 Ke5 38.Kd2 Rb3 39.Kc2 Rb7 40.Rh5+ f5 41.Rh3 a5 42.Rh1 Ra7 43.Rh6 a4 44.Rh2 a3 45.Kb3 a2! 46.Rxa2 Rxa2 47.Kxa2 f4 48.Kb3 f3 49.Kc4 f2 50.Kxc5 f1Q 51.Kxc6 Kf5 52.Kb6 e5 53.Kc5 Qd1 54.Kc6 e4 55.Kc5 e3 56.Kc4 e2 57.Kb5 e1Q 58.Kc6 Qc3+ 59.Kb5 Qb1+ 60.Ka4 Qca1# Accuracy: White = 1%, Black = 35%. 0–1
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Josh - Age 7-Vierjoki,T-0–1
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A06 Réti Opening: 1.Nf3 d5 (1.Nf3 d5 2.b3 Nc6)

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 d5 2.b3 Nc6)
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1.Nf3 d5 2.b3 A06 Nimzo-Larsen Attack: Classical Variation Nc6 A06 Réti Opening: 1.Nf3 d5 3.a3 3.Bb2 Bg4 4.d4 Bxf3 5.exf3 Qd6 6.g3 g5 7.h4 gxh4 8.Rxh4 Bg7 9.Qd3 0-0-0 10.Bh3+ e6 11.Ba3 Qd7 12.Nc3 h5 13.Na4 b6 14.Bf1 Nge7 15.0-0-0 Nf5 16.Qa6+ Kb8 17.Bb5 Qc8 Maryasin,B (2250)-Shereshevski,M (2460) Minsk 1978 1-0 (42) 3...Bf5 4.e3 e5N 4...Nf6 5.Bb2 e6 6.h3 Bd6 7.Be2 Be4 8.d3 Bxf3 9.Bxf3 Be5 10.d4 Bd6 11.Nd2 Ne7 12.c4 c6 13.cxd5 cxd5 14.b4 0-0 15.0-0 Ng6 16.Rc1 Rc8 17.Qb3 Qd7 18.Be2 e5 19.dxe5 Gross,H (1473)-Gordziel,M (1290) Saarlouis Steinrausch 2005 1/2-1/2 5.Bb5 e4 5...Bd6 6.Ne5 White should play 6.Nd4!= Bd7 7.Nc3 6...Bd7 Black should try 6...Qg5 7.Nxc6 a6 8.Nd4+ axb5 9.Nxf5 Qxf5 7.Qh5 7.Nxd7 Qxd7 8.Bb2 7...g6 7...Nxe5 8.Qxe5+ Ne7 9.Bxd7+ Qxd7 8.Bxc6?? 8.Nxc6 gxh5 9.Nxd8 8...gxh5-+ 9.Bxd7+ Ke7 Threatens to win with ...Bg7. 10.a4 intending Ba3+. Nf6??
10...c5-+ 11.Bh3 Bg7 11.Ba3+ c5 12.Bxc5# 1–0
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Mariah-Vierjoki,T-1–0
Les-Vierjoki,T-0–1
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6 Feb 2020

Looking at some of the blog's current chess statistics

Looking at some of the blog's current chess statistics

I like to take a look at some of the blog's statistics from time to time and now it is time for some chess stats. At the time I am typing this, there are 925 different opening variations published and the amount of chess games appearing in the blog is 1200, out of which I have won 704 (58.67%), drawn 110 (9.17%) and lost 386 (32.17%). So far the most played opening variation is A00 Irregular Openings (1.e3 e5), which has 16 games in it. Out of those games I have won 12 (75%), drawn 2 (12.5%) and lost 2 (12.5%). I have now published all my games between the ECO codes A00 and A05, as far as I know anyway. With the current pace of publishing the games, it will still take a very long time to get all the 9600+ chess games I have in my database published.

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A06 Réti Opening: 1.Nf3 d5 (1.e3 d5 2.Nf3 g6)

A06 Réti Opening: 1.Nf3 d5 (1.e3 d5 2.Nf3 g6)
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1.e3 A00 Van't Kruijs Opening d5 2.Nf3 g6 A06 Réti Opening: 1.Nf3 d5 3.Be2N 3.d4 Bg7 4.c4 e6 5.Nc3 Ne7 6.Be2 b6 7.0-0 Nd7 8.b3 Bb7 9.Bb2 0-0 10.Rc1 a6 11.Nb1 c5 12.Nbd2 Rc8 13.Ne5 cxd4 14.exd4 Nf5 15.Ndf3 dxc4 16.bxc4 Nxe5 17.dxe5 Qc7 Albin,A-Hodges,A New York 1893 0-1 (81) 3.c4 Nf6 3...e6 4.Nc3 Bg7 5.b3 Ne7 6.Bb2 0-0 7.Be2 c5 8.d4 cxd4 9.Nxd4 Nbc6 10.Nxc6 bxc6 11.0-0 Rb8 12.Qc2 e5 13.Rad1 Qc7 14.Ba3 d4 15.exd4 exd4 16.Na4 Re8 17.Bc5 Bf5 18.Bd3 Bergman,C-Donnelly,H San Francisco 1949 0-1 (46) 3...c6 4.Nc3 Bg7 5.cxd5 cxd5 6.Qa4+ Bd7 7.Qb3 Bc6 8.d4 e6 9.Ne5 Bxe5 10.dxe5 Nd7 11.f4 Ne7 12.Bd2 Nf5 13.0-0-0 Nc5 14.Qb4 Qe7 15.Nb5 Ne4 16.Qxe7+ Kxe7 17.Re1 Rhc8 18.Bb4+ Barcza,G-Tarnowski,A Debrecen 1961 0-1 (51) 4.Qa4+ Nbd7 5.Nc3 c6 6.cxd5 Nxd5 7.Qb3 Bg7 8.Nxd5 Nc5 9.Qc2 Qxd5 10.d4 Ne4 11.Bd3 Bf5 12.0-0 Bf6 13.b3 Nc5 14.Bxf5 gxf5 15.Bb2 Rg8 16.Ne1 Ne6 17.f4 c5 Ehlvest,J (2600)-Ganguly,S (2531) Hyderabad 2002 1/2-1/2 (38) 3.g3 Bg7 4.Bg2 Nf6 5.d4 Bg4 6.Nbd2 Nbd7 7.c4 c6 8.Qc2 Rc8 9.0-0 Bf5 10.Qb3 b6 11.Re1 0-0 12.Ne5 Nxe5 13.dxe5 Ne4 14.Nxe4 Bxe4 15.f4 Bxg2 16.Kxg2 dxc4 17.Qxc4 Qd5+ Gantes Leon,M (2044)-Almenar Montaner,V Valencia 2003 0-1 (33) 3...Bg7 4.c3 Nf6 5.Qa4+ Bd7 5...Nbd7 6.Qa5 6.Qd1= 6...Nc6 7.Qc5 7.Qa3 7...0-0 7...e5-+ And now ...Bf8 would win. 8.Qa3 e4 8.Bb5 8.d4 8...Ne4?
8...a5-+ Threatens to win with ...b6. 9.d4 b6 9.Qxd5= Nf6 9...Nd6= 10.Be2 e5 10.Qc5 10.Qb3! 10...Re8 11.Bc4 11.0-0= keeps the balance. 11...e6 Better is 11...Bf8! 12.Qg5 e5 12.Ng5?
12.0-0= and White is okay. 12...Bf8-+ 13.Qb5 13.Nxf7 Kxf7 14.Qg5 13...Rb8? Black should play 13...Nb4-+ 14.Qxb4 Bxb4 15.cxb4 b5 14.Nf3? 14.Bb3! 14...Ne5?? 14...Nb4-+ and all is fine. 15.Qxb4 Bxb4 16.cxb4 Bc6 15.Qxe5+- Bg7 16.Na3 Bc6 17.Ng5? 17.d4+- 17...Qe7? 17...Nh5! 18.Qc5 Bf8 19.Nxf7 Kxf7 20.Qxa7 Bxg2 18.Nxe6 18.Nf3 18...fxe6 19.Qg3 19.Qg5!+- is more deadly. 19...b5± 20.Nxb5? 20.Bb3± keeps the pressure on. 20...Bxb5-+ 21.Qf3? 21.Bxb5 Rxb5 22.0-0 21...Bxc4 22.Qf4 Bd5 23.f3 Nh5 24.Qg4 e5 White must now prevent ...Nf4! 25.Qa4 Rb7 26.e4 Bf7 27.d3 Nf4 28.Bxf4 exf4 29.Rb1 Qd6 30.0-0 Qxd3 31.Rbd1 Qb5 32.Qxb5 Rxb5 33.Rd7 Rb7 34.e5 Bxe5 35.Kh1 Rxb2 36.Rg1 Rxa2 37.h3 Rc2 Black mates. 38.Rgd1 Bd6 39.h4 Rxc3 40.Ra1 Be6 41.Rb1 Bxd7 42.Kh2 Kf7 43.Rd1 h6 44.Kh1 g5 45.Kh2 gxh4 46.Ra1 Bc5 47.Rd1 Rd8 48.Re1 Re8 49.Rd1 Bf5 50.Rd5 Ke6 51.Rd1 Be3 52.Ra1 c5 53.Re1 Ra3 54.Rd1 c4 55.Re1 c3 56.Re2 c2 57.Re1 c1Q 58.Rxc1 Bxc1 59.Kg1 Be3+ 60.Kh2 Ra1 61.g3 hxg3+ 62.Kg2 Rg1# Accuracy: White = 10%, Black = 17%. 0–1
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Miranda-Vierjoki,T-0–1
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A06 Réti Opening: 1.Nf3 d5 (1.Nf3 c5 2.d3 d5)

A06 Réti Opening: 1.Nf3 d5 (1.Nf3 c5 2.d3 d5)
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1.Nf3 c5 A04 Zukertort Opening: Sicilian Invitation 2.d3 d5 A06 Réti Opening: 1.Nf3 d5 3.c4 3.Nbd2 Nc6 4.e4 d4 5.Be2 e5 6.0-0 Bd6 7.c3 Nge7 8.cxd4 cxd4 9.Nc4 Bc7 10.Bd2 b5 11.Na3 a6 12.Rc1 0-0 13.Nh4 Be6 14.Qc2 Rc8 15.Qb1 Qd7 16.Bd1 Bd6 17.Nc2 f6 Janoschka,A (2220)-Wendt,R (2290) Germany 1995 1-0 (54) 3...Nc6N 3...e6 4.g3 b6 5.Bg2 Bb7 6.0-0 Nf6 7.Na3 g6 8.Bd2 Bg7 9.Rb1 0-0 10.b4 Nbd7 11.bxc5 Nxc5 12.Bb4 Bc6 13.d4 Na4 14.Bxf8 Nc3 15.Qd3 Nxb1 16.Bxg7 Nxa3 17.Bxf6 Qxf6 18.cxd5 Swicarz,M (2145)-Bylica,M (2000) Augustow 1996 1-0 (49) 3...Nf6 4.cxd5 Nxd5 5.g3 Nc6 6.Bg2 g6 7.Qb3 Bg7 8.Bd2 0-0 9.Nc3 Nb6 10.Ne4 Be6 11.Qc2 Rc8 12.Nc3 c4 13.dxc4 Bf5 14.e4 Nb4 15.Qb1 Nd3+ 16.Ke2 Be6 17.b3 Nxc4 18.Qxd3 Lehotzky,A-Finegold,R East Lansing 1995 0-1 (67) 4.cxd5 Qxd5 5.Nc3 Qd6 Better is 5...Qd7= 6.Ne4 6.g3! 6...Qd5 7.Be3 e5 7...Nf6= remains equal. 8.Qc2 8.g3± 8...Nf6 8...Nd4! is superior. 9.Qd1 Nf6 9.Bxc5?
9.Nxc5= and White has nothing to worry. Ng4 10.Ne4 9...Nxe4-+ 10.dxe4 Qxc5 11.Qxc5 Bxc5 12.e3 Bb4+ 13.Nd2 0-0 14.a3 Bxd2+ 15.Kxd2 Rd8+ 16.Ke1 Be6 17.Rd1 Rxd1+ 18.Kxd1 Rd8+ 19.Ke2 Bg4+ 20.f3 Be6 21.g3 Bc4+ 22.Kf2 Rd2+ 23.Kg1 Bxf1 24.Kxf1 Rxb2 Endgame KRN-KR 25.Rg1 Rxh2 26.Rg2 Rxg2 27.Kxg2 KN-KP Kf8 28.f4 f6 29.fxe5 Nxe5 Black mates. 30.Kh3 Nc4 31.a4 Nxe3 KN-K3P 32.g4 Ke7 33.Kh4 Kd6 34.g5 Ke5 35.Kh5 fxg5 36.Kxg5 Kxe4 KN-KP 37.Kh4 Kf4 38.Kh5 g5 39.Kh6 g4 40.Kxh7 g3 41.Kg6 Ke4 42.Kf6 b6 43.Ke6 a6 44.Kd6 Kf3 45.Kc6 Nc4 46.Kb7 b5 47.axb5 axb5 48.Ka6 b4 49.Kb5 b3 50.Kxc4 KP-KP b2 51.Kc3 b1Q 52.Kd4 Qd1+ 53.Ke5 Qa1+ 54.Kd5 g2 55.Kc4 Qa2+ 56.Kc3 g1Q 57.Kd3 Qe3# Accuracy: White = 26%, Black = 65%. 0–1
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Vierjoki,T-Lacey-0–1
vuduman1382Vierjoki,T15990–1
Kojjootti1549Vierjoki,T15580–1
electa1574Vierjoki,T1690½–½
gael721914Vierjoki,T18411–0
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2 Feb 2020

A05 Réti Opening: 1.Nf3 Nf6 (1.g3 Nf6 2.Bg2 d5 3.b3 g6 4.Bb2 Bg7 5.Nf3 O-O 6.O-O c5 7.d3 Nc6 8.Nbd2)

A05 Réti Opening: 1.Nf3 Nf6 (1.g3 Nf6 2.Bg2 d5 3.b3 g6 4.Bb2 Bg7 5.Nf3 O-O 6.O-O c5 7.d3 Nc6 8.Nbd2)
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1.g3 Nf6 A00 Hungarian Opening: Indian Defense 2.Bg2 d5 3.b3 g6 4.Bb2 Bg7 5.Nf3 0-0 6.0-0 c5 7.d3 Nc6 8.Nbd2 A05 Réti Opening: 1.Nf3 Nf6 8.Ne5= 8...h6 8...Qc7 8...b6 9.e3 Bb7 10.Qe2 Qc7 11.c4 Rad8 12.Rac1 e5 13.cxd5 Nxd5 14.a3 Qe7 15.Rfd1 Rfe8 16.Rc2 h6 17.Rdc1 Na5 18.e4 Nf6 19.Nxe5 Qd6 20.Ndc4 Nxc4 21.Nxc4 Qxd3 22.Qxd3 Rxd3 23.e5 Zoler,D (2455)-Tseitlin,M (2545) Tel Aviv 1996 1-0 (39) 9.e3N 9.Ne5 9.c4 d4 10.a3 a5 11.Ne1 e5 12.Nc2 Bf5 13.Rb1 Re8 14.f3 Qe7 15.Bc1 Nh7 16.Re1 Ng5 17.g4 Bd7 18.Nf1 Ne6 19.Ng3 Kh7 20.Bd2 Nf4 21.b4 axb4 22.axb4 cxb4 23.Nxb4 Nxb4 Wagner,F (1905)-Di Franco,P (2111) Bad Homburg 2011 0-1 (34) 9...Be6 Better is 9...Qc7 10.c4 Qd7 10...Re8= 11.cxd5 11.Rc1 11...Nxd5 12.Bxg7 Kxg7 13.Qc2 b6 14.Nc4 f6 14...Rac8 15.a3 15.d4= 15...Rac8 Black should try 15...Bg4! 16.Rfd1 16.Qb2 might be stronger. 16...Bf7 16...Bg4 17.Qb2 17.d4= 17...e5! 18.d4 18.Rac1= remains equal. 18...cxd4 19.exd4 b5? 19...e4 stays on course. 20.Nfd2 b5 20.Ne3?
20.dxe5+- Qe6 21.Ng5! hxg5 22.Bxd5 20...exd4 20...Nxe3! 21.fxe3 exd4 21.Nxd4 21.Nc2 stays ahead. 21...Nxe3 22.Bxc6?? 22.fxe3= and White is okay. Nxd4 23.exd4 22...Nxd1-+ Black is clearly winning. And not 22...Rxc6 23.fxe3 Rc7 24.Qf2= 23.Rxd1 Rxc6 24.Rd2 Rc7 Accuracy: White = 6%, Black = 32%. 0–1
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Vierjoki,T1856pkktet16910–1
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A05 Réti Opening: 1.Nf3 Nf6 (1.g3 d5 2.Bg2 Nf6 3.d4 g6 4.Nf3 Bg7 5.O-O O-O 6.b3 c5 7.Bb2 Nc6 8.e3 Ne4 9.Nbd2)

A05 Réti Opening: 1.Nf3 Nf6 (1.g3 d5 2.Bg2 Nf6 3.d4 g6 4.Nf3 Bg7 5.O-O O-O 6.b3 c5 7.Bb2 Nc6 8.e3 Ne4 9.Nbd2)
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1.g3 A00 Hungarian Opening d5 2.Bg2 Nf6 3.d4 g6 4.Nf3 Bg7 5.0-0 0-0 6.b3 c5 7.Bb2 Nc6 8.e3 Ne4 9.Nbd2 A05 Réti Opening: 1.Nf3 Nf6 9.Ne5= should be considered. 9...cxd4 9...Bf5 10.Nxd4 10.Nxe4 dxe4 11.Nxd4 10...Nxd4= 11.Bxd4 Bxd4 11...Nc3= 12.Qe1 Bxd4 13.exd4 Bg4 12.exd4± Nc3 13.Qe1N 13.Qf3 Qa5 13...Qc7 14.Rfe1 Bf5 15.g4 Be6 16.Re3 Rac8 17.a4 Qa5 18.Qf4 Qb4 19.Nf1 Rfd8 20.Rae1 Qd6 21.Qh6 Ne4 22.Bxe4 dxe4 23.Rxe4 Rxc2 24.Ne3 Rc3 25.g5 Bxb3 26.Rh4 e5 27.Qxh7+ Kf8 28.dxe5 Velasquez,M (2260)-Alonso,S (2484) Dos Hermanas 2004 0-1 (61) 14.Nb1 Nxb1 15.Rfxb1 13...b6?
13...Bg4 keeps the upper hand. 14.f3 Bf5 14.Nf3 14.Qe3± Qc7 15.Nb1 14...Ba6? 14...Qc7= and Black has nothing to worry. 15.Qxc3+- Bxf1 16.Bxf1 16.Rxf1 Qd6+- 16...Rc8 17.Qd2 Qc7 18.Rc1 Qc3 19.Qxc3 Rxc3 20.Kg2 Rfc8 21.Ne1 a5 22.a4? 22.Bb5+- 22...Rxb3± 23.Bd3 23.Bb5± 23...Rb4!= 24.Bb5! Rxd4 25.Nf3 Re4 Black should play 25...Rb4= 26.Nd2 Better is 26.Rd1 26...Re6? 26...Rb4 stays ahead. 27.c4? 27.Bd7+- Rec6 28.Bxc6 Rxc6 29.c4 27...d4? 27...Rd6= 28.Nf3? 28.Bd7+- 28...Rd6 29.Rd1 White has compensation. d3 30.Rd2 30.Ne1± 30...Rc5 30...Kg7 31.Ne1± Rc8 32.Kf3 Rcd8
33.Ng2 White should try 33.c5!± bxc5 34.Rxd3 33...e5 33...Rf6+= remains equal. 34.Ke3 Re6+ 35.Kf3 Rf6+ 36.Ke3 Re6+ 37.Kf3 Kg7 34.Ne3 f5 35.Nd5 e4+ 36.Ke3 Rc8? 36...Re6± 37.f3? 37.Ne7+ Kf7 38.Nxc8 37...Rc5? 37...Rf8 38.fxe4 Re6 38.fxe4+- Re6 39.Kxd3 fxe4+ 40.Kd4 e3 41.Nxe3 41.Re2 41...Rd6+? 41...Rc8 42.Nd5 Rd8 42.Nd5 Re6 43.Rf2 Accuracy: White = 28%, Black = 16%. 1–0
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Vierjoki,T1651pkktet14381–0
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A05 Réti Opening: 1.Nf3 Nf6 (1.b3 Nf6 2.Bb2 g6 3.g3 Bg7 4.Bg2 O-O 5.Nf3 d6 6.O-O e5 7.d3 Nc6)

A05 Réti Opening: 1.Nf3 Nf6 (1.b3 Nf6 2.Bb2 g6 3.g3 Bg7 4.Bg2 O-O 5.Nf3 d6 6.O-O e5 7.d3 Nc6)
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1.b3 Nf6 2.Bb2 g6 3.g3 Bg7 4.Bg2 0-0 5.Nf3 d6 6.0-0 A49 Zukertort Opening: Double Fianchetto Attack e5 7.d3 Nc6 A05 Réti Opening: 1. Nf3 Nf6 7...a5= 8.Nbd2 8.Qd2 8...h6 8...a5 9.e3N 9.e4 Be6 10.d4 Bg4 10...exd4 11.Nxd4 Nxd4 12.Bxd4 Qd7 13.Re1 Bh3 14.c4 Bxg2 15.Kxg2 Rfe8 16.f3 c6 17.Nf1 d5 18.exd5 Rxe1 19.Qxe1 Re8 20.Qf2 cxd5 21.Rc1 dxc4 22.Bxf6 Bxf6 23.Rxc4 Qd3 24.Rc2 b5 25.Qd2 Rishovd,S (2126)-Dolzhikova,K (2319) Kragero 2018 1/2-1/2 (77) 11.Qe1 Re8 12.d5 Ne7 13.h3 Bd7 14.c4 b6 15.Qd1 a5 16.Ne1 Nh5 17.Nd3 Rf8 18.a3 Qe8 19.b4 f5 20.c5 Bb5 21.Qc2 Nf6 22.a4 Bxd3 23.Qxd3 axb4 24.cxd6 Tichy,V (2370) -Kaposztas,M (2335) Trnava 1988 1/2-1/2 (38) 9.c4 Be6 10.c5 10.d4 exd4 11.Nxd4 Nxd4 12.Bxd4 d5 13.Rc1 Rc8 14.c5 c6 15.b4 Re8 16.Nf3 Bf5 17.a4 a6 18.e3 Be4 19.Bh3 Bxf3 20.Qxf3 Rc7 21.Rfd1 Ne4 22.Bf1 Bxd4 23.Rxd4 Re6 24.Bd3 Rce7 Kovacs,E (2251)-Ivan,A (2268) Hungary 2011 1/2-1/2 (79) 10.a3 Qd7 11.b4 Bh3 12.e4 Nh7 13.Qe2 Ng5 14.Nxg5 hxg5 15.Bxh3 Qxh3 16.f3 f5 17.Qg2 g4 18.Qxh3 gxh3 19.Nb3 a5 20.b5 Nd8 21.a4 Ne6 22.Bc1 Rf7 23.Be3 f4 24.Bd2 fxg3 Dragomirescu,C (2213)-Berbatov,K (2471) Eforie Nord 2010 1/2-1/2 (51) 10...Qd7 11.cxd6 cxd6 12.Ba3 b5 13.Rc1 Rac8 14.Re1 Rfe8 15.Ne4 b4 16.Bb2 Nd5 17.Ned2 Nc3 18.Bxc3 bxc3 19.Ne4 1/2-1/2 (19) Stromboli,C (2304) -Stromboli,E (2304) Campobasso 2011 9...Re8 9...Be6= 10.c4 10.a3 10...Nb4 10...Bf5 11.Qe2 11.Ne1 11...e4? 11...c5 stays ahead. 12.dxe4 12.Nxe4+- Nxe4 13.dxe4 12...Nxe4 12...Na6± is a better defense. 13.Bxg7+- Kxg7 14.a3? 14.Nxe4± Rxe4 15.Nd4 14...Nc6? Black should play 14...Nc3-+ 15.Qe1 Nd3 15.Qd3 15.Nxe4± Rxe4 16.Qb2+ Qf6 17.Qxf6+ Kxf6 18.c5 15...Nxd2= 16.Nxd2 Bf5 17.e4 17.Qc3+± Qf6 18.Qxf6+ Kxf6 19.Rfc1 17...Bc8 17...Be6= remains equal. 18.f4 18.Nb1± 18...Qf6 19.Rae1 19.Nf3 19...Qd4+ 20.Qxd4+ 20.Re3 keeps more tension. a5 21.Nb1 a4 22.b4 Be6 23.Nd2 20...Nxd4 21.Ra1 21.Re3= 21...Bg4 21...Bd7 22.Kf2= c5 22...g5 23.h3 23.b4= 23...Bd7 23...Be6 24.Ra2 24.b4= 24...Bc6 24...a5 25.Re1 25.b4= 25...Re7 25...a5! 26.b4! Rae8 27.b5 Bd7 28.a4 b6 29.a5 f5 30.axb6 axb6 31.Ra6 fxe4 31...Bc8= 32.Rxb6 Ra7 32.Rxe4 Bf5 33.Rxe7+ Rxe7 34.Bf1! Strongly threatening g4. Rb7 34...Bxh3 feels stronger. 35.Rxb6 Bxf1 36.Kxf1 Nf5 35.g4± Bc8 35...Bc2± 36.Ra8 36.Bd3+- 36...Be6
37.Bg2 37.Rd8!± 37...Re7= 38.Rb8 38.Bf1! 38...h5? 38...Ra7= and Black is okay. 39.gxh5? White must play 39.Rxb6+- Black must now prevent gxh5. hxg4 40.Rb7 40.Rxd6? g3+ 41.Kf1 Bf5-+ 40...Rxb7 41.Bxb7 39...gxh5? 39...Ra7= 40.Rxb6+- Nf5? 40...Bc8 might work better. 41.Nf3? 41.Ra6+- 41...Bxc4= 42.Bf1 42.Ng5!= 42...Bxf1 43.Kxf1 Endgame KRN-KRN Re3 44.Kf2 Rb3 45.Rb7+ Kf6 46.b6! Rb2+ 46...Ke6 47.Rb8 Rb2+ 48.Ke1 Ne7 47.Ke1= c4 48.Rb8 48.Rc7!= 48...c3 ...Rb1+ is the strong threat. 49.Rc8 c2 49...Rxb6 And now ...Rb3 would win. 50.Rxc3 Rb4 50.Kd2= Rxb6 51.Kxc2
51.Rf8+= keeps the balance. Kg6 52.Rg8+ Kf6 53.Rf8+ Kg6 54.Rg8+ Kf6 55.Rf8+ 51...Ne3+ 51...Rb4! 52.Kd3 Rxf4 52.Kd3 Nd5 53.Rd8 53.Rf8+= Kg7 54.Rf5 Rb3+ 55.Ke2 Nc3+ 56.Ke3 53...Nxf4+ 54.Ke4 Rb4+ 54...Nxh3 Hoping for ...Nf2+. 55.Rf8+ Kg6 55.Ke3 Threatens to win with Rf8+. Nd5+ 56.Kf2 56.Kd3 Ke7 57.Rh8 56...Ke7 Better is 56...Ke6 57.Rh8 Nf4 Black should try 57...Nf6 58.Ke3 d5 59.h4 59.Nd4= Ng2+ 60.Kd3 59...Ke6 59...Re4+ 60.Kf2 Nd3+ 61.Kg1 Ne5 60.Rh6+? 60.Nd4+= Kf7 61.Kxf4 Rxd4+ 62.Kg5 60...Kf5-+ 61.Rh7 intending Rf7+. Rb3+ 61...Re4+ 62.Kf2 Nd3+ 63.Kg2 Kf4 62.Kf2 Ke4?? 62...Rb2+-+ 63.Kf1 Kg4 63.Rg7?? 63.Nd2++- Kd4 64.Nxb3+ Kc3 65.Na5 63...Rb2+ 64.Kg1 Ne2+ Accuracy: White = 25%, Black = 22%. 64...Kxf3 - 65.Kh1 d4 66.Rd7 d3 67.Re7 d2 68.Rd7 Kg3 69.Rg7+ Kh3 70.Rg1 Rc2 71.Rf1 Rc1 72.Kg1 Kg3 73.Rxc1 dxc1Q# 0–1
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Vierjoki,T1583pkktet15110–1
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A05 Réti Opening: 1.Nf3 Nf6 (1.b3 e5 2.e3 Nf6 3.Nf3 d6 4.Bb2)

A05 Réti Opening: 1.Nf3 Nf6 (1.b3 e5 2.e3 Nf6 3.Nf3 d6 4.Bb2)
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1.b3 e5 A01 Nimzo-Larsen Attack: Modern Variation 2.e3 Nf6 3.Nf3 d6 4.Bb2 A05 Réti Opening: 1.Nf3 Nf6 Bg4 5.Be2 Nc6 5...Be7= 5...Nbd7 6.d4 e4 7.Nfd2 Bxe2 8.Qxe2 d5 9.c4 c6 10.Nc3 a6 11.0-0 Bd6 12.f3 Qe7 13.fxe4 dxe4 14.Rf5 0-0 15.c5 Bc7 16.Nc4 Qe6 17.Rff1 Nd5 18.Nxd5 cxd5 19.Nd2 f5 20.Ba3 Doucet,A (1901)-Peyre,T (2072) Avoine 2012 0-1 (54) 6.d4 6.0-0± 6...e4N 6...exd4= 7.Nxd4 Bxe2 8.Qxe2 Nxd4 9.Bxd4 c6 9...a6 10.0-0 Be7 11.Qf3 Qd7 12.c4 0-0 13.Nc3 c6 14.h3 b5 15.Rac1 bxc4 16.Na4 Qe6 17.Rxc4 d5 18.Rc2 Ne4 19.Rfc1 Bh4 20.Rxc6 Rac8 21.Qg4 Qxg4 22.hxg4 Rxc6 23.Rxc6 Nxf2 24.Nc3 Gundersen,H (2226)-Villing,D (2174) Dresden 2007 1-0 (39) 7.Nfd2 Bxe2 7...Bf5 8.Qxe2± White is better. d5 9.c4 9.0-0± 9...Nb4 10.0-0 Nc2 11.cxd5 11.Nxe4! keeps the upper hand. Nxa1 12.Nxf6+ Qxf6 13.Bxa1 11...Qxd5? 11...Nxa1 keeps the pressure on. 12.Qb5+ Qd7 13.Qxb7 Qxd5 14.Qxc7 Nxb3! 15.axb3 Bd6 12.Nc3 Black is under strong pressure. Qd7 12...Qh5 13.Rac1 Stronger than 13.Ncxe4 Nxe4 14.Nxe4 Nxa1 Weaker is 13.Ndxe4 Nxa1 14.Nxf6+ 14.Bxa1 Nxe4 15.Nxe4 0-0-0 14...gxf6= 13...Nb4 14.Ndxe4 Nxe4 15.Nxe4 Nxa2 16.Ra1 Nb4 17.Nc5 17.Rfd1+- and White stays clearly on top. 17...Bxc5± 18.dxc5 0-0 19.Rfd1 19.Qc4± Nc6 20.Rfd1 19...Qf5 19...Qe6= 20.Qc4 Nc6 21.Rd5 21.e4± Qe6 22.Qxe6 fxe6 23.Rd7 21...Qg6 21...Qe6 22.h4 White should play 22.h3± 22...h6! 23.h5 Qe6! 24.Qc3 24.Bc3± 24...f6= 25.Rad1 Rad8 26.Rxd8 Rxd8 27.Rxd8+ Nxd8 28.b4 Qg4 29.Qd2 Nc6 30.b5 Ne5 White must now prevent ...Nf3+. 31.Bxe5 fxe5 Endgame KQ-KQ 32.Qd5+ Kh7 33.Qxe5 c6 34.bxc6 bxc6 35.f3 Qa4! 36.Qf5+ Kg8 37.e4 a5 37...Qd4+= keeps the balance. 38.Kf1 Qd1+ 39.Kf2 Qd2+ 40.Kg3 a5 41.Qe6+ Kh7 38.e5 38.Qe6+± Kf8 39.Qd6+ Ke8 40.Qb8+ Kf7 41.Qb7+ Kf8 42.Qc8+ Kf7 43.Qd7+ Kg8 44.Kh2 38...Qd4+ 39.Kh2 Qxc5 40.Qc8+ Kf7 41.e6+ Kf6 42.Qe8! Qe5+ 43.Kg1 Qf7+ is the strong threat. Qxe6 44.Qg6+ Ke5 45.Qxg7+ Kd6 aiming for ...Qe1+. 46.Qd4+ Qd5! 47.Qf4+ Qe5 48.Qxh6+ Kd5 48...Ke7= 49.Qd2+ 49.Kf1!± 49...Ke6 50.h6 And now h7 would win. Qc5+? 50...Kf6= 51.Kh2? 51.Kf1 Threatens to win with h7. Qc4+ 52.Kf2 Qh4+ 53.Ke2 Qc4+ 54.Kd1 Qa4+ 55.Qc2 Qa1+ 56.Kd2 51...Qh5+ 51...Qe5+ 52.f4 Qf5 52.Kg3+- Qe5+ 53.Kh4 Qf6+ 54.Kh3 Qf5+
54...c5± 55.Qe2+ Kf7 55.Kh2 55.Kh4!+- is more deadly. Qf6+ 56.Kg3 55...Qh5+? 55...Kf7± is a better defense. 56.Kg1 Qc5+?
56...Qe5 57.h7 Qa1+ 58.Kf2 Kf7 59.Qd7+ Kg6 57.Kf1! Hoping for h7. Kf6 58.Qb2+ Kf5 59.g4+ Kf4 60.Kg2 Qd5 61.Qf6+ Ke3 62.Qe7+ Kd2 63.h7 Qd4 64.Qg5+ 64.Qe8 Kc2 65.h8Q Qc3 66.Qxc3+ Kxc3 67.Qxc6+ Kd3 68.Kf2 Kd4 69.g5 64...Ke2 65.Qe7+ Kd2 66.Qe8 Accuracy: White = 39%, Black = 36%. 1–0
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Kojjootti1740Vierjoki,T17711–0
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A05 Réti Opening: 1.Nf3 Nf6 (1.Nf3 c5 2.b3 g6 3.Bb2 Nf6)

A05 Réti Opening: 1.Nf3 Nf6 (1.Nf3 c5 2.b3 g6 3.Bb2 Nf6)
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1.Nf3 c5 A04 Zukertort Opening: Sicilian Invitation 2.b3 g6 3.Bb2 Nf6 A05 Réti Opening: 1.Nf3 Nf6 4.g4 Bg7 5.g5 5.h4 Rg8 6.g5 Nh5 7.Qc1 Nc6 8.Bxg7 Nxg7 9.Qb2 d6 10.d3 Bg4 11.Nbd2 Ne6 12.e3 Nc7 13.Be2 Nd5 14.c4 Nb6 15.d4 Nd7 16.d5 Nce5 17.Nh2 Bxe2 18.Kxe2 f5 19.f4 Nf7 Van Ackeren,F (1991)-Noering,A (1851) Germany 2015 1-0 5...Nh5 6.Bxg7 Nxg7 7.Nc3N 7.d4 d5 8.Qd2 Qd6 9.Nc3 e6 10.e4 0-0 11.0-0-0 cxd4 12.Nxd4 dxe4 13.Nxe4 Qe7 14.Nf6+ Kh8 15.h4 Nd7 16.Nxd7 Bxd7 17.h5 Nxh5 18.Be2 e5 19.Bxh5 gxh5 20.f3 Kg8 21.Rxh5 exd4 Becker,T-Reth,I Porz 1989 1/2-1/2 7...0-0 8.d3 8.d4= 8...Nc6 9.Qd2 d5 10.0-0-0 White should play 10.Bg2 10...e5 10...d4 11.Ne4 f5 12.gxf6 exf6 11.h4 Nf5 11...Be6 12.Bh3 Nfd4 13.Nxd4?
13.h5= 13...cxd4 14.Nb1 Qd6 15.Rdf1 Nb4 15...Bxh3 16.Rxh3 Rfc8 16.Kb2 Bxh3 17.Rxh3 Rfc8 18.Rc1 Rc7 Hoping for ...Rac8. 19.a3 Na6 20.Rhh1 Rac8
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Vierjoki,T1468pkktet13691–0
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A05 Réti Opening: 1.Nf3 Nf6 (1.Nf3 Nf6 2.g3 g6 3.Bg2)

A05 Réti Opening: 1.Nf3 Nf6 (1.Nf3 Nf6 2.g3 g6 3.Bg2)
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1.Nf3 Nf6 2.g3 g6 A05 King's Indian Attack: Symmetrical Defense 3.Bg2 A05 Réti Opening: 1.Nf3 Nf6 c5 4.0-0 4.b3 d6 5.0-0 e5 6.d3 Bg7 7.e4 0-0 8.Bb2 Nc6 9.Nbd2 h6 10.Re1 Re8 11.c3 d5 12.exd5 Nxd5 13.a3 Rb8 14.b4 cxb4 15.axb4 b5 16.Ne4 Qc7 17.Nc5 a5 18.Qb3 Rd8 Dubov,D (2638)-Grischuk,A (2779) Khanty Mansiysk 2013 1-0 (57) 4...Bg7 5.e3N 5.d4 cxd4 6.Qxd4 Nc6 7.Qh4 Qb6 8.Na3 d5 9.c4 dxc4 10.Nxc4 Qa6 11.b3 Ng4 12.Bb2 Bxb2 13.Nxb2 Qxe2 14.Nc4 0-0 15.h3 Nge5 16.Nfxe5 Nxe5 17.Nxe5 Qxe5 18.Rfe1 Qf6 19.Qxf6 exf6 Sagit,R (2389)-Pajeken,W (2269) Stockholm 2016 1/2-1/2 (47) 5.Re1 d5 6.c4 Nc6 7.cxd5 Nxd5 8.Nc3 0-0 9.Qb3 Nb6 10.Na4 Be6 11.Qd1 Nxa4 12.Qxa4 h6 13.d3 Qd7 14.a3 Rae8 15.Bd2 Bd5 16.Bc3 e5 17.Nd2 Kh7 18.Rac1 Bxg2 19.Kxg2 f5 Tokovic,S (2268)-Pajzer,I (2152) Subotica 2008 1-0 (31) 5...0-0 6.c4 d5 7.cxd5 Nxd5 8.Nc3 The position is equal. Nxc3 9.bxc3 c4 10.a4 Nc6 11.Ba3 Bf5 12.Ra2 12.Nd4!? 12...Na5 13.Rb2 Nb3 13...Re8= 14.Nd4 Nxd4 15.exd4 Rb8 16.Rxb7 Rxb7 17.Bxb7 Qb6 Black should play 17...Qc7 18.Qf3 Rd8 18.Bd5± Rc8 18...Bf6± 19.Bxc4 Bh3 19.Bxe7+- Be6 19...Qa5 20.Bxe6 Qxe6 21.Bc5 a6 22.Re1 Qf5 23.Qe2 Rb8?
23...Qd5 was necessary. 24.Qf1 h5 24.Qxc4 Accuracy: White = 53%, Black = 4%. 1–0
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Vierjoki,T1493pkktet13441–0
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A05 Réti Opening: 1.Nf3 Nf6 (1.Nf3 c5 2.g3 g6 3.Bg2 Bg7 4.O-O Nf6 5.d3 Nc6)

A05 Réti Opening: 1.Nf3 Nf6 (1.Nf3 c5 2.g3 g6 3.Bg2 Bg7 4.O-O Nf6 5.d3 Nc6)
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1.Nf3 c5 A04 Zukertort Opening: Sicilian Invitation 2.g3 g6 3.Bg2 Bg7 4.0-0 Nf6 5.d3 Nc6 A05 Réti Opening: 1.Nf3 Nf6. LiveBook: 160 Games 6.Be3N 6.c4= deserves consideration. a6 6...d5 7.Nc3 7.cxd5 Nxd5 8.a3 0-0 9.Qc2 b6 10.Nc3 Bb7 11.Bd2 Rc8 12.Qa4 a6 13.Qh4 Nd4 14.Nxd4 cxd4 15.Nxd5 Bxd5 16.Bxd5 Qxd5 17.Qxe7 Rfe8 18.Rac1 Ra8 1/2-1/2 (18) Lee,P (2390)-Penrose,J (2450) Blackpool 1971 7...e6 8.Bf4 0-0 9.Qc1 d4 10.Nb5 Ne8 11.Bh6 e5 12.Bxg7 Kxg7 13.e3 Bf5 14.e4 Bg4 15.h3 Bd7 16.Nh4 a6 17.Na3 Nd6 18.Nc2 Qe7 19.Qd2 Rae8 20.b4 b6 21.bxc5 Walczak,P (2128)-Dlugosz,J (2177) Biala 2000 0-1 7.Nc3 Rb8 8.a4 0-0 9.h3 d6 10.Be3 e5 11.Rb1 Bd7 12.Ne1 Nh5 13.Bd2 f5 14.Nc2 a5 15.e3 Nb4 16.Nxb4 axb4 17.Nd5 Bc6 18.b3 Qd7 19.Kh2 Rbe8 20.f4 Nf6 21.Qc2 Martinovic,S (2410) -Ermenkov,E (2495) Smederevska Palanka 1979 1/2-1/2 6.Nbd2 0-0 7.c3 d6 8.Rb1 Rb8 9.b4 Nd5 10.Bb2 cxb4 11.cxb4 Ndxb4 12.Bxg7 Kxg7 13.Qc1 Na6 14.Qc3+ f6 15.Rfc1 Bd7 16.d4 Qa5 17.Qb2 Rfc8 18.Nc4 Qd8 19.e4 Bg4 20.e5 Bf5 Mista,L-Filep,T Reggio Emilia 1968 1-0 (35) 6...d5 Better is 6...Ng4 7.Bc1 7.Bxc5 Bxb2 8.Nbd2 Bxa1 7...d5 7.Bxc5 Nh5 7...Nd7 8.Ba3 0-0 8.Nbd2 8.d4± 8...Qa5?
8...Bxb2 9.Rb1 Bc3 9.Ba3 9.d4!+- 9...Bg4 9...0-0± 10.Rc1 Rd8 10.c4+- Nd4? 10...Nf6 is a better chance. 11.h3 Bd7 11.Nxd4 Bxd4 12.Bxd5 Qa6 12...Qc7 13.Qa4+ Bd7 13.Rb1 Nf6 14.Bf3 Bxf3 15.Nxf3 15.exf3 e5+- 15...Bb6 16.Qb3 0-0? 16...Bd8 is a better defense. 17.e4 0-0 17.Rfd1 17.Bxe7 Ng4 18.Bxf8 Rxf8 19.d4 17...Bxf2+? 17...Rfe8 18.Rbc1 18.c5 Bc7+- 18...Rad8 18.Kxf2 Qe6 19.Qxb7 Ng4+ 20.Kf1 Qe3
21.Kg2? 21.Ke1+- 21...Qxe2+= 22.Kh3? 22.Kg1= Qe3+ 23.Kg2 23.Kh1? Nf2+ 24.Kg2 Nxd1-+ 23...Qe2+ 24.Kg1 Qe3+ 25.Kg2 25.Kh1? Nf2+ 26.Kg2 Nxd1-+ 25...Qe2+ 22...Nf2+-+ 23.Kh4 Qe6 24.Qxe7 Qg4# Accuracy: White = 15%, Black = 1%. 0–1
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Vierjoki,T-Adam-0–1
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