(21) Sowell,N (1700) - Casares,N (1600) [D11]
BCC Nov 2004 (1), 05.11.2004

1.d4 d5 2.c4 dxc4 3.Nf3 Diagram

3...c6 [ 3...a6 4.e3 Nf6 5.Bxc4 e6 6.0-0 c5 ( 6...Nbd7 7.b3 Bd6 8.Bb2 0-0 9.Nbd2 c5 10.Re1 cxd4 11.Nxd4 Nb6 12.Be2 e5 13.N4f3 Qe7 14.Qc2 Bd7 15.Ne4 Rac8 16.Nxf6+ Qxf6 17.Qe4 Bc6 18.Qg4 Qe7 19.Bd3 Bd7 20.Qh5 e4 21.Ng5 Bf5 22.Be2 Bg6 23.Qg4 f5 24.Qh4 h6 25.f4 hxg5 26.fxg5 Be5 27.Bh5 Rc6 28.Rac1 Rfc8 29.Rxc6 Rxc6 30.Bxg6 Rxg6 31.Bxe5 Qxe5 32.Rf1 Nd5 33.Qh5 Rc6 34.g6 Nxe3 35.Qg5 Qd4 36.Kh1 Nxf1 37.Qxf5 Qf6 38.Qd5+ Re6 0-1 Prokes,L-Duras,O/Plzen 1911/EXT 99 (38)) 7.Bb3 ( 7.Qe2 b5 8.Bb3 Bb7 9.Rd1 Nbd7 10.e4 ( 10.Nc3 Be7 11.e4 b4 12.e5 bxc3 13.exf6 Bxf6 14.d5 e5 15.bxc3 0-0 16.Nd2 Be7 17.Nc4 a5 18.Nxe5 Nxe5 19.Qxe5 Bf6 20.Qg3 c4 21.Ba4 Qe7 22.Bf4 Rfd8 23.d6 Qe4 24.Re1 Qf5 25.d7 h5 26.Re8+ Kh7 27.h4 Ra6 28.Bg5 Rxd7 29.Bxd7 Qxd7 30.Rae1 Rd6 31.Bxf6 Rxf6 32.Qb8 Rf5 33.Rh8+ Kg6 34.Rd8 Qb5 35.Rd6+ Kh7 36.Rd8 Qc5 37.Re3 Bd5 38.Rh8+ Kg6 39.Qd8 Bf3 40.Rxf3 Rxf3 41.gxf3 1-0 Smyslov,V-Keres,P/Zuerich 1953/Candidates (41)) 10...cxd4 11.e5 Bxf3 12.gxf3 Nh5 13.f4 g6 14.Rxd4 Qb6 15.Rd1 Rd8 16.Nc3 Be7 17.f5 0-0 18.Be3 Bc5 19.Rd6 Bxe3 20.Rxb6 Bxb6 21.Rd1 Nc5 22.Qf3 Nxb3 23.axb3 Bd4 24.Rd3 exf5 25.Qd1 Bb6 26.Nd5 Rb8 27.Rh3 Bd8 28.Rxh5 gxh5 29.Qxh5 Kh8 30.Qxf5 Rg8+ 31.Kf1 Rg7 32.Nf4 Kg8 33.e6 Be7 34.Nh5 Rf8 35.Nxg7 Kxg7 36.Qe5+ Kg6 37.Kg2 b4 38.f4 f5 39.Kf3 h5 40.Qe2 h4 41.Qxa6 Rd8 42.Qe2 Rd6 43.Qe3 Rd8 44.Ke2 Kf6 45.Qe5+ Kg6 46.Qe3 Kg7 47.Qg1+ Kf6 48.h3 Rf8 49.Kd3 Kxe6 50.Qe3+ Kd7 51.Kd4 Rf6 52.Qg1 Rf8 53.Kd5 Rf6 54.Qg8 Ra6 55.Qb8 Rh6 56.Qb7+ Kd8 57.Ke5 Rf6 58.Qb8+ Kd7 59.Qg8 Rc6 60.Kxf5 Rf6+ 61.Ke5 Rc6 62.Qd5+ Kc7 63.Qa5+ Kb7 64.Qa4 Bf8 65.Qb5+ Kc7 66.Qa5+ Rb6 67.Qa7+ Rb7 68.Qa6 Bg7+ 69.Kd5 Rb6 70.Qa7+ Rb7 71.Qa5+ Kb8 72.Qd8+ Ka7 73.Qxh4 Ka6 74.Qd8 Bxb2 75.f5 Bc3 76.f6 Rh7 77.Kc6 1-0 Timman,J-Seirawan,Y/Indonesia 1983/MCD (77)) 7...Nc6 8.Qe2 Qc7 9.Nc3 Bd6 10.Bd2 0-0 11.Rac1 cxd4 12.exd4 Bf4 13.Rfd1 Bd7 14.Ne4 Nd5 15.Nc5 Bxd2 16.Qxd2 Rad8 17.Bxd5 exd5 18.Ne5 Be8 19.Qc3 Nxe5 20.dxe5 Bb5 21.Qd4 Qe7 22.a4 Be2 23.Re1 Bc4 24.a5 Rc8 25.b4 Rc6 26.Rc3 b6 27.axb6 a5 28.Rg3 g6 29.e6 fxe6 30.Rge3 axb4 31.Nxe6 Qf6 32.Qxf6 Rxf6 33.b7 Rb6 34.Nc5 Rfc6 35.Re8+ Kg7 36.b8Q Rxb8 37.Rxb8 Rxc5 38.Rxb4 Rc7 39.f3 Kf7 40.Kf2 Kf6 41.Rb6+ Kf7 42.Reb1 h6 43.Rb7 Rxb7 44.Rxb7+ Kf6 45.Rb6+ Kf5 46.Rd6 h5 47.h4 Bb3 48.Ke3 Ba2 49.g3 g5 50.Rh6 1-0 Petrosian,A-Gulko,B/Tashkent 1984/MCD (50); 3...Bg4 4.Ne5 Bh5 5.Nxc4 e6 6.Qb3 Nc6 7.e3 Rb8 8.Nc3 Nf6 9.Be2 Bxe2 10.Nxe2 Bb4+ 11.Nc3 0-0 12.0-0 Nd5 13.Nxd5 Qxd5 14.Qc2 e5 15.Nxe5 Nxe5 16.dxe5 Qxe5 17.Bd2 Bxd2 18.Qxd2 Rfd8 19.Qc2 Rd5 20.Rad1 Rbd8 21.Rxd5 Rxd5 22.Rd1 g6 23.Rxd5 Qxd5 24.a3 c5 25.h3 b5 26.Qc3 c4 27.f4 Qe4 28.Kf2 a5 29.g4 h6 30.h4 Qh1 31.Kg3 Qg1+ 32.Kf3 Qh2 33.g5 h5 34.Ke4 Qxh4 35.Qxa5 Qh1+ 36.Ke5 Qc6 37.Qa7 h4 38.f5 gxf5 39.Kxf5 Qf3+ 40.Ke5 h3 41.Kd4 Qg4+ 0-1 Gruenfeld,E-Tartakower,S/Semmering 1926/HCL (41)] 4.g3 Diagram

4...Bg4 [ 4...Nf6 5.Bg2 b5 ( 5...Bg4 6.Ne5 Be6 7.Nc3 Nbd7 8.0-0 Nxe5 9.dxe5 Qxd1 10.Rxd1 Nd7 11.f4 f6 12.exf6 exf6 13.Kf2 Bc5+ 14.Be3 0-0-0 15.Ne4 Bxe3+ 16.Kxe3 Kc7 17.Kf2 Bd5 18.Nd2 Bxg2 19.Kxg2 Rhe8 20.Kf3 b5 21.a4 Kb6 22.Ne4 a6 23.axb5 axb5 24.Nd6 Rf8 25.Nc8+ Kc7 26.Nd6 Ra8 27.Nf5 g6 28.Nd4 Nc5 29.g4 Rxa1 30.Rxa1 Kb6 31.f5 Rd8 32.e3 b4 33.h4 gxf5 34.gxf5 Nd3 35.Rb1 c5 36.Ne6 Ne5+ 37.Ke4 Rg8 38.Kd5 Rg2 39.Nf8 Rg7 40.Ke6 Rf7 41.Ng6 hxg6 42.fxg6 Rg7 43.Kxf6 Rxg6+ 44.Kxe5 Rh6 45.Rh1 Kb5 46.e4 c3 47.bxc3 Rh5+ 48.Kd6 bxc3 49.e5 c2 50.Rc1 Rxh4 51.Rxc2 Rd4+ 52.Kc7 Re4 53.Kd6 Rd4+ 54.Ke7 Re4 55.e6 c4 56.Kd6 Re3 57.e7 Kb4 58.Rb2+ Ka3 1/2-1/2 Pasztor,F-Bugyinszki,I/Hungary 1993/TD (58); 5...e6 6.Nc3 Bb4 7.0-0 Nbd7 8.Qc2 b5 9.e4 Bb7 10.a4 a6 11.axb5 cxb5 12.e5 Nd5 13.Ng5 Qb6 14.Nxd5 Bxd5 15.Bxd5 exd5 16.Bd2 Bxd2 17.Qxd2 0-0 18.f4 f6 19.Nf3 Rae8 20.Kg2 f5 21.Qb4 Nb8 22.Qa5 Qxa5 23.Rxa5 Re6 24.Re1 h6 25.Kf2 Rc8 26.g4 fxg4 27.f5 Rb6 28.Nh4 Nc6 29.Raa1 Nxd4 30.Rad1 Nxf5 31.Nxf5 Rf8 32.e6 Rxf5+ 33.Kg3 Kf8 34.Kxg4 Rg5+ 35.Kf4 Ke7 36.h4 Rh5 37.Kg4 g6 0-1 Cid Royo,O-Anglada Bigorda,J/Cerrado 1994/EXT 2004 (37)) 6.a4 ( 6.0-0 Bb7 7.Ne5 e6 8.a4 Qb6 9.b3 cxb3 10.Qxb3 a6 11.Bb2 Nbd7 12.Nxd7 Nxd7 13.Nd2 Be7 14.d5 Nc5 15.Qe3 cxd5 16.Bxg7 Rg8 17.Bd4 Qd6 18.axb5 axb5 19.Rxa8+ Bxa8 20.Rc1 1-0 Pessi,J-Sammalvuo,T/Jyvaskyla 1994/EXT 2000 (20)) 6...Bb7 7.Ne5 Qb6 8.e4 e6 9.0-0 Nbd7 10.Be3 Qc7 11.Nxd7 Qxd7 12.b3 cxb3 13.Qxb3 Be7 14.Rd1 0-0 15.axb5 cxb5 16.d5 exd5 17.e5 Ng4 18.Bxd5 Bxd5 19.Rxd5 Qf5 20.Bd4 Rfd8 21.Nc3 Qf3 22.e6 Bf6 23.exf7+ Kh8 24.Re1 Rf8 25.Qd1 Qxd1 26.Rxd1 b4 27.Nb5 Rxf7 28.h3 Nh6 29.g4 Ng8 30.Nd6 Rd7 31.g5 Bxd4 32.R5xd4 a5 33.h4 g6 34.h5 gxh5 35.f4 Rad8 36.f5 b3 37.f6 b2 38.Nf7+ Rxf7 39.Rxd8 Rb7 40.Ra8 b1Q 41.Rxb1 Rxb1+ 42.Kf2 Rb2+ 43.Kg3 Rb3+ 44.Kh4 Rf3 45.Rf8 h6 46.f7 hxg5+ 47.Kxg5 1-0 Erler,M-Hack,K/Germany 1987/GER (47); 4...e6 5.Bg2 b5 6.0-0 Bb7 7.Ne5 ( 7.Nc3 Nd7 8.e4 Ngf6 9.Qe2 Be7 10.d5 cxd5 11.exd5 Nxd5 12.Nxb5 0-0 13.Qxc4 Rc8 14.Qe2 Ba6 15.a4 Nc5 16.Bd2 Bf6 17.Rfd1 Qb6 18.Ne5 Nxa4 19.Bxd5 Bxb5 20.Bc4 Bxc4 21.Nxc4 Qb5 22.Rdc1 Bxb2 23.Rab1 Qa6 24.Rc2 Bc3 25.Bxc3 Qxc4 26.Qf3 Nxc3 27.Kg2 Qd5 0-1 Bellin,J-Engqvist,T/Gausdal 1990/CBM 16 ext (27)) 7...Bd6 8.Nc3 Bxe5 9.dxe5 Qc7 10.Ne4 Ne7 11.Nd6+ Kf8 12.a4 Nd7 13.axb5 Nxe5 14.Nxb7 Qxb7 15.Bf4 Qxb5 16.Qd6 N5g6 17.Rfd1 Kg8 18.Bg5 Qxg5 19.h4 Qe5 20.Qd7 Qc5 21.Qb7 Rf8 22.Rxa7 Nc8 23.Ra6 Qb5 24.Qa8 Nb6 25.Qb7 Nc8 26.Qa8 Nce7 27.Qa7 Nd5 28.e4 Nc7 29.Rb6 Qe5 30.Rxc6 Nb5 31.Qa2 Nd4 32.Rxc4 Ne2+ 33.Kf1 Nxg3+ 34.fxg3 Qxg3 35.b4 Nxh4 36.b5 Nxg2 37.Qxg2 Qb3 38.Rdc1 Qxb5 39.Kg1 h5 40.Rc5 Qb6 41.Kh1 g6 42.Rg5 Kh7 43.Qf3 Qd8 44.Rxh5+ Kg7 45.Qc3+ Qf6 46.Rh2 Rxh2+ 47.Kxh2 Qxc3 48.Rxc3 Kf6 49.Kg3 Ke5 50.Kf3 Rh8 51.Re3 0-1 Hamann,F-Schierling,E/Gluecksburg 1988/EXT 2000 (51); 4...b5 5.Bg2 Bb7 6.Ne5 Nd7 7.0-0 Ngf6 8.a4 Nxe5 9.dxe5 Nd5 10.Nc3 e6 11.axb5 cxb5 12.Nxb5 Qd7 13.Nc3 Bb4 14.Nxd5 Bxd5 15.Bxd5 exd5 16.Qd4 0-0 17.e4 Qg4 18.Bf4 dxe4 19.Qxc4 a5 20.Qxe4 h6 21.Rac1 Rac8 22.Kg2 Qe6 23.Rfd1 Rxc1 24.Rxc1 Rd8 25.Rc6 Qd5 26.Qxd5 Rxd5 27.Kf3 Rb5 28.Ke4 Bc5 29.f3 Rb4+ 30.Kd3 Bd4 31.Ra6 Bg1 32.Kc2 Rb5 33.Ra8+ Kh7 34.Rf8 a4 35.Bd2 Kg6 36.Re8 Bxh2 37.Bc3 Bxg3 38.e6 Be5 39.exf7 Kxf7 40.Rxe5 Rxe5 41.Bxe5 Ke6 42.Bc7 1-0 Kozul,Z-Varga,Z/Makarska 1994/EXT 97 (42); 4...g6 5.Bg2 Bg7 6.0-0 Nf6 7.a4 0-0 8.Na3 Nbd7 9.Nxc4 Nb6 10.Nce5 a5 11.Bd2 Ne4 12.Be1 c5 13.e3 cxd4 14.exd4 Be6 15.Qe2 Bd5 16.b4 axb4 17.Bxb4 Rxa4 18.Rxa4 Nxa4 19.Ra1 Nb6 20.Ba5 Qd6 21.Qb5 Nc8 22.Bb4 Qd8 23.Rc1 Nf6 24.Bh3 Nd6 25.Qc5 Qa8 26.Ne1 Qa2 27.Qc7 Nfe4 28.Rc2 Qb1 29.Qa5 b5 30.Rc7 Ra8 31.Rc8+ Nxc8 32.Qd8+ Bf8 33.Qxd5 Ng5 34.Qxa8 Qxb4 35.N5d3 Nxh3+ 36.Kg2 Qxd4 37.Kxh3 Nd6 38.Kg2 e5 39.Qb8 e4 40.Nf4 Qd2 41.Kf1 e3 42.fxe3 Qxh2 43.Nf3 Qxg3 44.Ne5 Qxe3 0-1 Briffel,F-Dreev,A/Moscow 1985/MCL (44)] 5.Bg2 Nf6 Diagram

6.0-0 [ 6.Ne5 Be6 7.Nc3 Nbd7 8.0-0 Nxe5 9.dxe5 Qxd1 10.Rxd1 Nd7 11.f4 f6 12.exf6 exf6 13.Kf2 Bc5+ 14.Be3 0-0-0 15.Ne4 Bxe3+ 16.Kxe3 Kc7 17.Kf2 Bd5 18.Nd2 Bxg2 19.Kxg2 Rhe8 20.Kf3 b5 21.a4 Kb6 22.Ne4 a6 23.axb5 axb5 24.Nd6 Rf8 25.Nc8+ Kc7 26.Nd6 Ra8 27.Nf5 g6 28.Nd4 Nc5 29.g4 Rxa1 30.Rxa1 Kb6 31.f5 Rd8 32.e3 b4 33.h4 gxf5 34.gxf5 Nd3 35.Rb1 c5 36.Ne6 Ne5+ 37.Ke4 Rg8 38.Kd5 Rg2 39.Nf8 Rg7 40.Ke6 Rf7 41.Ng6 hxg6 42.fxg6 Rg7 43.Kxf6 Rxg6+ 44.Kxe5 Rh6 45.Rh1 Kb5 46.e4 c3 47.bxc3 Rh5+ 48.Kd6 bxc3 49.e5 c2 50.Rc1 Rxh4 51.Rxc2 Rd4+ 52.Kc7 Re4 53.Kd6 Rd4+ 54.Ke7 Re4 55.e6 c4 56.Kd6 Re3 57.e7 Kb4 58.Rb2+ Ka3 1/2-1/2 Pasztor,F-Bugyinszki,I/Hungary 1993/TD (58)] 6...Nbd7 7.Qc2 b5 8.Rd1 e6 9.Ne5 Nxe5 10.dxe5 Nd5 11.h3 Bh5 12.Nc3 Qc7 13.a4 Bg6 14.Nxd5 cxd5 15.e4 b4 16.f4 Bc5+ 17.Kh2 b3 18.Qe2 Bxe4 19.Bxe4 dxe4 20.Qxe4 0-0 21.Bd2 Rab8 22.Rac1 Rfd8 23.Rxc4 Qb6 24.Qe2 Rd7 Diagram

25.Rdc1 The scoresheets have degenerated and a very interesting thing ended up happening. I think I might have managed to reconstruct the aftermath down below. When I looked at the board, Nick's clock read that he had been down on time for about 5 minutes. I did this after Nick had stood up, stopping the clock to ask Bret Rohmer about the legality of winning on time without complete scoresheets. Bret told him he needed an almost complete scoresheet so they played on. I told Nelson to keep score only because I wanted to have access to the position. After they made time control or whatever, they picked up keeping score. Craig Andries was baffled, but then it occured to me, Nelson didn't want to win on time because that would prevent him from winning on the board. A very beautiful situation, I must concurr. [ Rico jumped at that point that 25.Ba5 Qxa5 a) 25...Bg1+ 26.Kh1 (a) 26.Kg2 Qxa5 27.Rxd7) 26...Qxa5 27.Rxd7; b) 25...Qa6 26.Rxd7 (b) 26.Rxc5?? Qxe2+) 26...Qxa5; c) 25...Qc6 26.Rxd7 Qxd7 27.Rxc5; d) 25...Qb7 26.Rxd7 (d) 26.Rxc5 Rxd1 (d) 26...Rf8) ) 26...Qxd7 (d) 26...Bg1+ 27.Kxg1 Qxd7) 27.Rxc5 Qxa4; 26.Rxd7 I was desparately trying to reconstruct the game before we left the club.] 25...Rbd8 26.Be1 Bf2? Diagram

This blunder seems to be the path to the material balance and positional duress of the white king reached in the game. The duress proved to be worth it and could be viewed as a simple moving project. The black queen plays the part of the allied moving team (all by herself as will be seen in the coming combination.) [ 26...Bg1+ 27.Kg2] 27.Qxf2 [ 27.Bxf2 e.g. 27...Qa6] 27...Rd2 28.Qxd2 [ 28.Bxd2?? Qxf2+] 28...Rxd2+ 29.Bxd2 Qf2+ 30.Kh1 Qf3+ [ 30...Qxd2?? 31.Rc8+ and mate next move] 31.Kg1 Qxg3+ 32.Kf1 Qf3+ 33.Ke1 Qh1+ 34.Ke2 Qg2+ 35.Kd3 Qxh3+ I'm not 100% sure of all these moves, but I think I have reached the game position now, as the h3 pawn falls with check given to a Kd3 with the coming interposition, according to both players. 36.Be3 h5 37.Rc8+ Kh7 38.R8c7 [ 38.Rb8 might be good, trying to get rid of that irritating b3 pawn.] 38...Qf5+ 39.Kd4 h4 40.Rg1 Kh6 41.Rg5 Diagram

41...Qb1? (Sowell) [ Nelson doesn't like the text, but the engines' immediate assessment disagrees. However, after further consideration it seems that perhaps the principle of keeping active pieces might allow black some chances. 41...Qh7 42.f5 ( 42.Rxf7? probably allows black too much counterplay 42...Qc2 43.Rgxg7 Qxb2+ 44.Kc5 Qc3+ 45.Kd6 Qxe3 46.Kxe6; 42.Rg4 Kh5 43.Rg1 a6 44.Rxf7 Qc2) 42...Qg8 a) 42...Qh8 43.fxe6 Diagram

a1) 43.Rxf7 Qd8+ 44.Kc3 Qa5+ 45.Kxb3 Qd5+ (a1) 45...Qxe5 46.Rg6+ Kh7 47.Rgxg7+ Qxg7 48.Rxg7+ Kxg7 49.fxe6 h3 50.Bg1 and white must only overcome minor technical difficulties for the win.) 46.Kc2 Qc4+ 47.Kd2 Qd5+ (a1) 47...Qb4+ 48.Ke2 Qc4+ a11) Fritz claims 48...Qxb2+? fails miserably 49.Kf3 Qxe5 with forced mate in five 50.Rgxg7+ Qxe3+ puter spite check gives black the longest life (a11) 50...Kh5 51.Rh7#) 51.Kxe3 exf5 52.Kf4 interestingly, the fastest way to mate is with aid from the king here. 52...h3 53.Kxf5 h2 54.Rh7# I think Fritz is right.; a12) 48...exf5? 49.Rgxg7+ f4 50.Bxf4+ Qxf4 (a12) 50...Kh5 51.Rf5#) ; 49.Kf3 Qf1+ 50.Kg4 Qg2+ 51.Kxh4 Qe4+ 52.Rg4+ Qxe3 53.Rg6+ Kh7 54.Rgxg7+ Kh8 55.Rh7+ Kg8 56.Kh5 Qh3+ 57.Kg5 (a1) 57.Kg6 Qg4+ 58.Kf6 Qxf5+ 59.Ke7 Qxe5 60.Rfg7+ Qxg7+ 61.Rxg7+ Kxg7 62.Kxe6 Diagram

ah.. a position for my five piece ending tablebase. 62...Kf8 I think it is telling me mate in 17 now 63.Kd7 (a1) 63.Kd6 apparently, equivalent is 63...Ke8 64.Kc7 now white must close in on c8.) 63...Kf7 64.a5 technique! of course this all seems fairly obvious but white must be sure to keep control of c8 to win. This might not be trivial. 64...a6 (a1) 64...Kf6 now white has five equivalent possibilities with other inferior wins (I didn't mention these before.. here I will only acknowledge their existance) 65.a6 a11) 65.Kc6 Ke7 looks most logical, but it is one amoung equal possibilities for black. (a11) 65...Ke5; a11) 65...Ke6) ; a12) 65.Kc7 Ke5 (a12) 65...Ke6; a12) 65...Ke7) 66.a6 (a12) 66.Kb7 Kd5 (a12) 66...Kd6 67.a6 (a12) 67.Kxa7) ) ) 66...Kd4 a121) 66...Kd5 67.Kb7 Kc5 (a121) 67...Kd6 68.Kxa7 Kc7) 68.Kxa7 Kc6 69.Kb8 (a121) 69.b4 Kb5 70.Kb7[] hah! white's first chance to lose the win, though fairly obvious he must hold onto his pawn(s)) ; a122) 66...Ke4!? 67.b4 this improves white by two moves over alternatives.; ; a13) 65.Kc8 Ke5 66.a6 (a13) 66.Kb7) ; a14) 65.Kd6 Kf7 66.Kc7 Ke6 (a14) 66...Ke7) ; ) ) ) 48.Ke2; a2) 43.Rxa7 Qd8+ 44.Kc3 Qd5 45.fxe6 Qxe6; ; b) 42...exf5? Diagram

43.Rxf5+ Kg6 44.Rg5+ Kh6 45.Rc6+ Qg6 b1) 45...g6?? 46.Rgxg6+ Kh5 47.Rg5#; b2) 45...f6 46.exf6 g6 47.Rf5+ g5[] 48.f7+ Qg6 (b2) 48...Kg7 49.f8Q#; b2) 48...Kh5 49.Rxg5#) 49.Rxg6+ Kxg6 50.f8Q Diagram

with mate in three; ; 43.Rxa7 Qd8+ 44.Kc3 Qd5 ( 44...Qc8+ 45.Kxb3) 45.fxe6 Qe4! ( 45...Qxe6 46.a5) 46.Rg3+ ( 46.Kd2 Qc2+ 47.Ke1 Qb1+ 48.Ke2 Qc2+ 49.Kf3 Qc6+ 50.Kf2 Qc2+ 51.Kg1 Qd1+ 52.Kh2 Qe2+ 53.Rg2+ Qxe3 54.exf7 Qxe5+) 46...Kh5 47.exf7 hxg3 48.f8Q Qxe3+ 49.Kb4 Qxa7; 41...Qh3] 42.Bc1 Diagram

Although the queen is trapped, she also at least ties up a couple of white's pieces. The bishop must remain to keep the queen trapped and protect the b2 pawn, and the Rc7 must protect the bishop. As the above variations show, white's pieces can rip black up with the smallest false move. In all likelihood, though this is probably immanently inevitable in any case. 42...h3 [ I was thinking black should play 42...Qa1 while discussioning the early position where we reached this material balance, Craig Andries came up with the plan of queening the h pawn. It is a good plan, but the way to implement it is to not lose the pawn. Black should be lost, but his best chance is to keep up threats with the queen to improve his position. Right now, black has some bad problems with second rank, but if black can counter on the king in the center, perhaps he can weasel his way into a draw, or even a win with a white blunder. 43.Rc4 ( 43.Rxa7?? Qxc1) 43...g6 Diagram

( 43...f5 44.exf6 gxf6 45.Rg1 f5 ( 45...Kh5? 46.Rc8 Qxa4+ 47.Ke3 Qxf4+ is the least silicon-influentually insane recourse to immediate mate) 46.Rg8 Qb1 47.Ke3 Kh5 48.Re8 ( 48.Rc7 Qe4+ 49.Kf2 Kh6) 48...h3 49.Rxe6 h2? 50.Rc7 Qe4+ ( 50...h1Q?? 51.Rh7+ Kg4 52.Rg6# Diagram #) 51.Rxe4 fxe4 52.Rh7+) ; My first thought was 42...Qa2 but this is inferior because it takes pressure off the Bc1, now white can safely respond with 43.Rxa7 holding onto his a pawn and keeping the queen inactive. 43...Qa1 44.Rg1 ( 44.Ra8!? Kh7 ( 44...Qxc1?? 45.Rh8#) 45.Rg1) ] 43.Rg3 [ 43.Rc3 g6 44.Rxh3+ Kg7 45.Rc3] 43...Qf5 44.Rcc3 g5 45.Rxh3+ [ 45.Rxg5 h2 46.Rxf5 h1Q 47.Rxf7] 45...Kg6 46.fxg5 Qg4+ 47.Kc5 Qe4 48.Rhe3 Qd5+ 49.Kb4 a5+ 50.Ka3 Qb7 51.Rxb3 Qe7+ 52.Ka2 Qc5 53.Rbc3 1-0