C41 Philidor Defence (1.e4 e5 2.Nf3 d6 3.d4 Bg4 4.dxe5 Bxf3 5.Qxf3 dxe5 6.Bc4 Qf6 7.Qb3)

It seems that if there is any possibility, however small, chance to mess things up, I am likely to do so... I thought I had been careful when publishing these new posts, but I have done one mistake with them that I noticed yesterday. The game that is shared now was shared in a post called C41 Philidor Defence (7.Qb3), I failed to notice that this game had one different move during those seven moves than the first game in that post. That post now has all the moves considered to be theory by Deep Fritz 14 in the name of the post like I have done with this game. I think I now need to this same thing to all my other posts too... This game was played in a team match called CS Africa vs King Hunters (jp). The match was played on 5 boards between Chess Society Africa and King Hunters. I played on board 3 for King Hunters and I was able to win both my games against keem2016. The final result of the match was 3.5 - 6.5 in favor of King Hunters.

The move 4...Bxf3 creates a position that is clearly favorable for White. The first move that could have been the losing one was my opponent's 7th move, b6, in the position below.

The best choice for keem2016.

A better option for keem2016 would have been 7...Nd7, but even then the game would have been very tough for my opponent. Keem2016 kept fighting on and was almost rewarded for the fight later on in the game. The first time I lost my winning advantage was in the position below because I blundered with 34.Rd3??

The correct move was 34.Rd1.

It was difficult for me to convert my material advantage into a win and indeed I had to be very careful with my moves. There was only one move to keep my winning advantage and sadly I could not find the correct idea. Instead of 34.Rd3 I should have played 34.Rd1. Keem2016 replied with 34...Qe2, blundering the game away again. I made a second horrible move in a row, my 35th move actually gave my opponent for the first time a chance to fight for the win. Then my opponent took a wrong path again and played 35...Qf1+, the correct move was 35...Re8. I continued with 36.Kb2, which gave the last chance to keem2016 to get a win from this game. Unfortunately for him, he played 36...Qxg2+, which became the losing move of the game.

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Move	N	Result	Elo

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1.e4 e5 2.Nf3 d6 3.d4 Philidor Defense Bg4 3...exd4 4.Qxd4 Bd7 Philidor Defense: Boden Variation 3...f5 4.Nc3 Philidor Defense: Philidor Countergambit, Zukertort Variation 3...Nd7 4.Bc4 c6 5.c3 Philidor Defense: Hanham Variation, Delmar Variation 4.dxe5 Bxf3 5.Qxf3 dxe5 6.Bc4 Qf6 7.Qb3 C41 Philidor Defence b6 8.Nc3 c6 9.Be3 9.0-0 Bd6 10.Be3 Ne7 11.Rad1 0-0 12.Rd2 Ng6 13.Rfd1 Bc7 14.g3 b5 15.Bc5 bxc4 16.Qb7 Na6 17.Qxa6 Rfd8 18.Qxc4 Rxd2 19.Rxd2 Rd8 20.Rxd8+ Qxd8 21.Bxa7 Qa8 22.Bc5 Bd8 23.b4 h5 Biccari,A (1848)-Vivoda,S (1697) Trieste 2017 1-0 (85) 9...b5 9...Nd7 10.a4 Bc5 11.0-0 Qe7 12.Rae1 Bxe3 13.Rxe3 Ngf6 14.Rd1 0-0 15.Re2 Nc5 16.Qb4 Rad8 17.f3 Rxd1+ 18.Nxd1 Rd8 19.Ne3 g6 20.b3 Kf8 21.Rd2 Rxd2 22.Qxd2 Qd7 23.Qxd7 Nfxd7 24.Kf2 Mossakowski,F (2229) -Woestmann,U Bad Zwesten 1999 1-0 (43) 10.Be2 a5 11.Nxb5N 11.a3 Bd6 12.Rd1 b4 13.Na4 Nd7 14.Qd3 Ke7 15.Bg5 Qxg5 16.Qxd6+ Ke8 17.Qxd7+ Kf8 18.Qxc6 Rb8 19.Qd6+ 1-0 (19) Klein, O-Heiser,K Mehlingen 1992 11.Nd5 and White takes home the point cxd5 12.Bxb5+ Nc6 13.exd5 Bb4+ 14.c3+- 11...cxb5 12.Bxb5+ Nc6 13.0-0-0 Nge7 13...Rc8 hardly improves anything 14.Rd3 Bb4 15.Qd5+- 14.Rd3 14.Bc5 secures the point a4 15.Qb4 g6+- 14...g6 15.Rhd1 Rc8 15...Bg7 there is nothing else anyway 16.Rd6 Qh4 17.Rxc6 0-0+- 16.Qa4 16.Rd6 and White can already relax Qxd6 17.Rxd6 Bg7 18.Bxc6+ Nxc6+- 16...Bg7 17.Rd6 Qh4 18.Bxc6+ 18.g3 ends the debate Qh3 19.Rd8+ Rxd8 20.Bxc6+ Nxc6 21.Qxc6+ Qd7 22.Rxd7 Rxd7 23.Bg5+- 18...Nxc6 19.Rxc6 0-0 20.h3 20.Rxc8 seems even better Rxc8 21.Qxa5 Bh6 22.Bxh6 Qxh6+ 23.Qd2 Qxh2+- 20...Rcd8 20...Rxc6 21.Qxc6 Bh6 22.Qc3+- 21.Rcd6 21.Rxd8!? keeps an even firmer grip Qxd8 22.b3 Qd7+- 21...Rc8 21...Bh6 22.Qa3 Rc8 23.Bxh6 Qxh6+ 24.R1d2+- 22.R1d5 22.Kb1 might be the shorter path Ra8+- 22...Bh6 23.Bxh6 Qxh6+ 24.Kb1 24.Rd2+- nails it down 24...Qf4± 25.f3 Qg3?? but even a better move would not have saved the game 25...Qh2 26.g4 Qh1+ 27.Rd1 Qxf3± 26.Rd2+- Kg7 26...Qe1+ 27.Rd1 Qf2 28.R6d2+- 27.c4 Qe1+ 28.Kc2 Rc5 29.b3 Rfc8 29...Rb8 30.R6d5 Rxd5 31.Rxd5 31.exd5?! e4 32.Qa3 e3= 31.cxd5?? Rc8+ 32.Qc6 Rxc6+ 33.dxc6 Qe3-+ 31...Qf2+ 32.Rd2+- 30.R6d5 Rxd5 31.exd5 Weaker is 31.Rxd5 Qg1 32.Qd7 Ra8+- 31...e4 32.Qxa5 e3 33.Qc3+ f6 34.Rd3 White threatens to win material: Rd3xe3 34.Rd1 makes it even easier for White Qe2+ 35.Kc1 Qxa2+- 34...Qe2+?? causes further problems for White 34...Qf2+ 35.Kc1 Ra8 36.Rxe3 Rxa2= 35.Kb1 35.Kc1 finishes off the opponent Re8 36.d6 Qxg2 37.d7+- 35...Qf1+ 36.Kb2?? releasing the pressure on the opponent 36.Kc2 Qe2+ 37.Kc1+- 36...Qxg2+?? throws away a nice position 36...Re8 with excellent chances for Black 37.d6 Qf2+ 38.Qc2 Qxc2+ 39.Kxc2 e2-+ 37.Qc2+- Qxf3 38.d6 Qxh3 38...Re8 is one last hope 39.a4 Qf1+- 39.Qe2 Qd7 40.Qxe3 Re8 41.Qf2 Re5 42.c5 Kf7 43.Kc3 43.Qc2 f5 44.c6 Qe6 45.c7 Re2 46.c8Q Qxc8 47.Qxe2 Qd8 48.Qe5 Qe8 49.Qa5 f4 50.d7 Qe2+ 51.Rd2 Qe7 52.d8Q Qxd8 53.Rxd8 Ke6 54.Re8+ Kd6 55.Qa6+ Kc7 56.Re7+ Kd8 57.Qd6+ Kc8 58.Qc7# 43...Qb5 43...g5 praying for a miracle 44.Qd4 Kg6+- 44.b4 Re4 45.Rd4 Re2 46.Qf3 Kg7 47.Kb3 47.d7 Qa6 48.a4 Qe6 49.d8Q Re3+ 50.Qxe3 Qxe3+ 51.Kb2 Qe2+ 52.Rd2 Qe5+ 53.Qd4 Qe1 54.c6 Qg3 55.Qd7+ Kh6 56.c7 Qe5+ 57.Ka2 f5 58.c8Q Qg3 59.Qc1 Kh5 60.Qh1+ Kg4 61.Rd4+ Qf4 62.Qg2+ Kh5 63.Qxh7+ Qh6 64.Qgxg6# 47...f5 48.d7 Re1 48...Qa6 doesn't change anything anymore 49.Qxe2‼ Mate threat Qxe2 50.d8Q Qe6+ 51.Qd5 Qe1 52.c6 Kh6 53.Ka4 Qc3 54.Qd7 f4 55.c7 Qc2+ 56.Ka5 Qxa2+ 57.Kb6 Qc2 58.c8Q Qxc8 59.Qxc8 Kh5 60.Qh3+ Kg5 61.Qh2 Kf6 62.Qxf4+ Kg7 63.Rd7+ Kh8 64.Qb8# 49.d8Q Re8 49...Re6 doesn't change the outcome of the game 50.c6! Mate attack Qxc6 51.Qxc6 Re3+ 52.Ka4 f4 53.Qdf6+ Kg8 54.Rd8+ Re8 55.Rxe8# 50.Rd7+ Kf8 50...Qxd7 doesn't do any good 51.Qc3+ Qd4 52.Qcxd4+ Kf7 53.Q8f6+ Kg8 54.Qg7# 51.Qf6+ 51.Qf6+ Kg8 52.Qg7# 1–0

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White	EloW	Black	EloB	Res

Vierjoki,T

1815

keem2016

1721

1–0

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