I spent two or three fun evenings analyzing the Traxler counter-attack with Komodo 9.3, Stockfish 7, and the latest development build of Stockfish (which was 160129 then), and even though the safe way to play against Traxler is well-known (to humans) to be 5. Bxf7+, modern strong engines consistently fall into the Traxler's trap and seek adventure by playing 5. Nxf7. Before I get to the games played by the mighty Komodo and Stockfish, let me illustrate the dangers that an unsuspecting strong engine may be facing by a game played by Strelka 5.1 against Critter 1.2 back in 2011:jdart wrote:If you like this sort of thing, another wild line is:
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5
(Traxler gambit). White can sac two ways: 5. Bxf7+ and 5. Nxf7. After 5. Nxf7, Black can play the counter-sac .. Bxf2+:
[D] r1bqk2r/pppp1Npp/2n2n2/4p3/2B1P3/8/PPPP1bPP/RNBQK2R w KQkq - 0 6
with a very complex game, so much so that you mostly see this line only in correspondence, if at all.
--Jon
[pgn][Event "Computer chess game"]
[Site "DMITRI-ASUS"]
[Date "2011.12.05"]
[Round "?"]
[White "Strelka_5.1x64"]
[Black "Critter_1.2_64bit"]
[Result "*"]
[BlackElo "2200"]
[ECO "C57"]
[Opening "Two Knights"]
[Time "01:19:24"]
[Variation "Traxler, 5.Nxf7 & 6.Kxf2"]
[WhiteElo "2200"]
[TimeControl "1800"]
[Termination "normal"]
[PlyCount "77"]
[WhiteType "program"]
[BlackType "program"]
1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5 5. Nxf7 Bxf2+ {(Bc5xf2+ Ke1xf2
Nf6xe4+ Kf2-g1 Qd8-h4 g2-g3 Ne4xg3 Nf7xh8 Ng3xh1 Bc4-f7+ Ke8-d8 Kg1xh1
Qh4-e4+ Kh1-g1 Qe4-d4+ Kg1-g2 Qd4-e4+ Qd1-f3 Qe4xf3+ Kg2xf3 Nc6-d4+ Kf3-e4
Nd4xc2 d2-d4 d7-d5+ Bf7xd5 Nc2xa1 Nh8-f7+ Kd8-e8 d4xe5) -2.91/12 1} 6. Kxf2
{(Ke1xf2 Nf6xe4+ Kf2-g1 Qd8-h4 g2-g3 Ne4xg3 Nf7xh8 Ng3xh1 Bc4-f7+ Ke8-d8
Kg1xh1 Qh4-e4+ Kh1-g1 Qe4-d4+ Kg1-g2 Qd4-e4+ Qd1-f3 Qe4xf3+ Kg2xf3 Nc6-d4+
Kf3-e4 Nd4xc2 d2-d4 d7-d5+ Bf7xd5 Nc2xa1 Nh8-f7+ Kd8-e8 d4xe5) +4.11/10 0}
Nxe4+ {(Qd8-e7 Nf7xh8 Qe7-c5+ d2-d4 Qc5xc4 d4-d5 Nc6-d4 c2-c3 Nd4-b5 Qd1-e2
Nf6xe4+ Kf2-e3 Qc4xe2+ Ke3xe2 Ne4-f6 Nb1-d2 Nb5-d6 c3-c4 b7-b5 c4-c5 Nd6-f5
Nd2-f3 e5-e4 Nf3-g5 Nf6xd5) -0.62/16 38} 7. Ke3 {(Kf2-e3 Qd8-h4 g2-g3
Ne4xg3 h2xg3 Qh4-d4+ Ke3-f3 d7-d5 Rh1-h4 e5-e4+ Kf3-g2 O-O Nb1-c3 Qd4xc4
d2-d3 Qc4-c5 Qd1-h5 Rf8xf7 Qh5xh7+ Kg8-f8 Bc1-e3 Qc5-d6 d3xe4 d5-d4 Qh7-h8+
Kf8-e7 Nc3-d5+ Ke7-d7 Rh4-f4 Rf7xf4) +2.36/17 29} Qh4 {(Qd8-e7 Nf7xh8 d7-d5
Qd1-h5+ g7-g6 Nh8xg6 Qe7-c5+ Ke3-e2 Ne4-f6 Qh5-g5 Nf6-e4 Qg5-e3 Qc5xc4+
Ke2-e1 h7xg6 d2-d3 Qc4xc2 d3xe4 Nc6-b4 Bc1-d2 Nb4-d3+ Ke1-f1 Bc8-g4 e4xd5
Qc2-d1+ Bd2-e1 O-O-O Qe3-d2 Rd8-f8+ Kf1-g1 Qd1xe1+ Qd2xe1 Nd3xe1 Nb1-c3
Ne1-d3 Ra1-f1 Rf8xf1+ Kg1xf1 Nd3xb2 h2-h3 Bg4-f5 Kf1-f2 Nb2-c4 Nc3-b5
a7-a6) -0.57/17 54} 8. g3 {(g2-g3 Ne4xg3 h2xg3 Qh4-d4+ Ke3-f3 d7-d5 Rh1-h4
e5-e4+ Kf3-g2 O-O Nb1-c3 Qd4xc4 d2-d3 Qc4-c5 Qd1-h5 Rf8xf7 Qh5xh7+ Kg8-f8
Bc1-e3 Qc5-d6 d3xe4 d5-d4 Qh7-h8+ Kf8-e7 Nc3-d5+ Ke7-d7 Rh4-f4 Rf7xf4)
+1.76/15 0} Nxg3 9. hxg3 {(h2xg3 Qh4-d4+ Ke3-f3 d7-d5 Kf3-g2 Bc8-g4 Bc4-e2
Qd4-e4+ Be2-f3 Bg4xf3+ Qd1xf3 Qe4xf3+ Kg2xf3 O-O Kf3-g4 Rf8xf7 b2-b3 Rf7-f6
Bc1-b2 Rf6-g6+ Kg4-h3 Rg6-h6+ Kh3-g2 Rh6xh1 Kg2xh1 Nc6-b4 Nb1-a3) +1.83/14
0} Qd4+ {(Qh4xg3+ Qd1-f3 Qg3xf3+ Ke3xf3 Rh8-f8 Nb1-c3 Nc6-b4 Rh1xh7 d7-d5
Nc3xd5 Ke8xf7 Kf3-g3 Kf7-g6 Rh7-h4 Nb4xc2 Nd5xc7 Nc2xa1 Nc7xa8 Na1-c2
Rh4-h2 Nc2-d4 Na8-c7 Bc8-d7 b2-b3 Rf8-f3+ Kg3-g2 Bd7-c6 Nc7-d5 Bc6-d7
Nd5-e7+) -0.67/16 17} 10. Kf3 {(Ke3-f3 d7-d5 Kf3-g2 Bc8-g4 Bc4-e2 Qd4-e4+
Be2-f3 Bg4xf3+ Qd1xf3 Qe4xf3+ Kg2xf3 O-O Kf3-g4 Rf8xf7 b2-b3 Rf7-f6 Bc1-b2
Rf6-g6+ Kg4-h3 Rg6-h6+ Kh3-g2 Rh6xh1) +1.57/13 0} d5 {(O-O Rh1-h4 e5-e4+
Kf3-g2 d7-d5 Bc4-b3 Rf8xf7 Qd1-g1 Qd4-e5 d2-d3 e4xd3 Nb1-c3 d3xc2 Qg1-e3
Qe5xe3 Bc1xe3 Bc8-f5 Bb3xd5 Ra8-e8 Bd5xf7+ Kg8xf7 g3-g4 Re8xe3 g4xf5 Nc6-e5
Kg2-f2 Re3xc3 b2xc3 Ne5-d3+ Kf2-e3 c2-c1Q+ Ra1xc1 Nd3xc1 Rh4xh7 Nc1xa2
Ke3-d4 Kf7-f6) -0.61/18 52} 11. Rh4 {(Rh1-h4 e5-e4+ Kf3-g2 O-O Bc4-b3
Rf8xf7 Qd1-g1 Bc8-e6 Qg1xd4 Nc6xd4 d2-d3 Nd4xb3 a2xb3 Be6-f5 d3-d4 e4-e3
Bc1xe3 Ra8-e8 Be3-f2 Bf5xc2 Nb1-c3 a7-a6 b3-b4 Bc2-f5 Ra1-e1 Re8xe1 Bf2xe1
Rf7-e7 Rh4-f4 g7-g6 g3-g4) +2.14/19 30} e4+ 12. Kg2 {(Kf3-g2 O-O Bc4-b3
Rf8xf7 Qd1-g1 Bc8-e6 Qg1xd4 Nc6xd4 d2-d3 Nd4xb3 a2xb3 Be6-f5 d3-d4 e4-e3
Bc1xe3 Ra8-e8 Be3-f2 Bf5xc2 Nb1-c3 a7-a6 b3-b4 Bc2-f5 Ra1-e1 Re8xe1 Bf2xe1
Rf7-e7 Rh4-f4 g7-g6 g3-g4) +2.14/18 0} O-O {(Rh8-f8 Nb1-c3 Qd4xc4 Nf7-g5
Qc4-c5 d2-d4 e4xd3/ep Qd1-e1+ Nc6-e7 Ng5xh7 d5-d4 Nh7xf8 d4xc3 Rh4-h8
Ke8-f7 c2xd3 Bc8-f5 Qe1xc3 Qc5-d5+ Kg2-h2 Qd5-f3 Qc3-c4+ Ne7-d5 Qc4-c5
Qf3-e2+ Kh2-g1 Qe2-e1+ Kg1-g2 Qe1-e2+ Qc5-f2 Qe2xf2+ Kg2xf2 Ra8xf8 Rh8xf8+
Kf7xf8 Bc1-e3) -0.65/18 50} 13. Bb3 {(Bc4-b3 Rf8xf7 Qd1-g1 Bc8-e6 Qg1xd4
Nc6xd4 d2-d3 Nd4xb3 a2xb3 Be6-f5 d3-d4 e4-e3 Bc1xe3 Ra8-e8 Be3-d2 Re8-e2+
Kg2-f3 Re2-e6 Kf3-f2 Bf5xc2+ Rh4-f4 a7-a6 Rf4xf7 Kg8xf7 Bd2-f4 Re6-f6
Nb1-d2 g7-g5 Ra1-c1 g5xf4 Rc1xc2 f4xg3+ Kf2xg3) +1.76/18 33} Rxf7 14. Rf4
{(Rh4-f4 Rf7xf4 g3xf4 Bc8-e6 Nb1-c3 Ra8-f8 Qd1-h5 g7-g6 Qh5-h4 a7-a6 a2-a3
Rf8-d8 Nc3-e2 Qd4-g7 d2-d3 e4xd3 c2xd3 Be6-f5 Bb3-c2 Rd8-e8 Qh4-f2 Qg7-h6
Ne2-g3 Bf5-g4 Bc1-d2) +2.18/20 68} Bf5 {(Bc8-e6 Rf4xf7 Be6xf7 Nb1-c3 Nc6-e5
Qd1-e2 c7-c6 Qe2-e3 Qd4xe3 d2xe3 Ra8-f8 Nc3-e2 Bf7-h5 Ne2-d4 Bh5-f3+ Kg2-f2
Rf8-f6 Kf2-e1 Rf6-g6 Nd4-f5 Rg6-f6 Nf5-e7+ Kg8-f7) -0.41/18 48} 15. Nc3
{(Nb1-c3 g7-g5 Rf4-f2 Ra8-d8 d2-d3 Qd4xf2+ Kg2xf2 Bf5-g4+ Kf2-g2 Bg4xd1
Nc3xd1 e4xd3 c2xd3 h7-h6 Nd1-e3 Nc6-e7 Bc1-d2 c7-c6 Ra1-h1 Kg8-g7 Ne3-g4
Ne7-f5 Bd2-c3+ Kg7-h7 a2-a3 Rd8-f8) +1.16/18 24} g5 {(g7-g5 Rf4-f2 Ra8-d8
d2-d3 Qd4xf2+ Kg2xf2 Bf5-g4+ Kf2-g2 Bg4xd1 Nc3xd1 e4xd3 Bc1xg5 Rd8-e8 c2xd3
Re8-e2+ Kg2-h3 Nc6-b4 Nd1-c3 Re2xb2 Bg5-c1 Rb2xb3 a2xb3 Rf7-f1 Kh3-g2
Rf1-e1 d3-d4 Nb4-c2 Ra1-b1 Nc2xd4 Kg2-f2 Re1-e5 Bc1-f4 Re5-f5 Nc3-e2 Nd4-e6
Rb1-a1 a7-a6 Kf2-e3) -0.41/16 0} 16. Rf1 {(Rf4-f1 Bf5-g4 Qd1xg4 Rf7xf1
Qg4xg5+ Kg8-h8 Kg2xf1 Ra8-f8+ Qg5-f4 Rf8xf4+ g3xf4 Nc6-e7 Nc3-e2 Qd4-b6
d2-d3 e4-e3 c2-c3 Qb6-e6 Ne2-d4 Qe6-h3+ Kf1-e2 c7-c5 Bc1xe3 Qh3-h2+ Ke2-f3
c5xd4 Be3xd4+ Kh8-g8 Bd4xa7 Qh2-h3+ Kf3-f2 Qh3-h4+ Kf2-f3 Qh4-h5+ Kf3-f2
Qh5-h2+ Kf2-f3) -0.05/19 61} Bg4 {(Nc6-b4 Qd1-h5 Bf5-h3+ Kg2xh3 Rf7xf1
Qh5xg5+ Kg8-f8 Nc3-e2 Qd4-f2 Qg5-f4+ Kf8-g7 Qf4xf2 Rf1xf2 Ne2-d4 c7-c6
g3-g4 Ra8-g8 Bb3-a4 c6-c5 Nd4-e6+ Kg7-g6 a2-a3 Nb4-c6 Ne6xc5 Rg8-f8 Kh3-h4
Nc6-d4) 0.00/19 47} 17. Qxg4 {(Qd1xg4 Rf7xf1 Qg4xg5+ Kg8-h8 Kg2xf1 Ra8-f8+
Qg5-f4 Rf8xf4+ g3xf4 Nc6-e7 Nc3-e2 Qd4-b6 a2-a4 Qb6-h6 Bb3-a2 Qh6-h3+
Kf1-f2 a7-a5 Ra1-b1 c7-c5 b2-b4 Qh3-h2+ Kf2-e1 a5xb4 Bc1-b2+ Kh8-g8 a4-a5
Qh2-h1+ Ke1-f2 Qh1-h4+ Kf2-f1 Qh4-h3+ Kf1-f2) -0.64/19 38} Rxf1 18. Qxg5+
{(Qg4xg5+ Kg8-h8 Kg2xf1 Ra8-f8+ Qg5-f4 Rf8xf4+ g3xf4 Nc6-e7 a2-a4 c7-c6
Nc3-e2 Qd4-b4 Ra1-a3 Ne7-f5 Bb3-a2 Kh8-g7 c2-c3 Qb4-d6 b2-b4 h7-h5 c3-c4
d5xc4 b4-b5 Qd6-d5 b5xc6 Qd5xc6 Ra3-c3 Qc6xa4 Ba2xc4 a7-a5 Bc4-b3 Qa4-d7
Rc3-c5) -0.61/20 26} Kh8 {(Qd4-g7 Qg5xg7+ Kg8xg7 Kg2xf1 Nc6-d4 Nc3xd5 c7-c6
Nd5-f4 Kg7-f6 Kf1-f2 b7-b6 Bb3-a4 b6-b5 c2-c3 b5xa4 c3xd4 Ra8-d8 Kf2-e3
Rd8-e8 d4-d5 c6xd5 Nf4xd5+ Kf6-f5 b2-b4 Re8-d8 Nd5-e7+ Kf5-e6 Ne7-c6
Rd8-d3+ Ke3xe4 Rd3xg3 Bc1-b2 Rg3-g2) 0.00/18 13} 19. Kxf1 {(Kg2xf1 Ra8-f8+
Qg5-f4 Rf8xf4+ g3xf4 Nc6-e7 a2-a4 c7-c6 Nc3-e2 Qd4-b4 Ra1-a3 Ne7-f5 Bb3-a2
Kh8-g7 c2-c3 Qb4-d6 b2-b4 h7-h5 c3-c4 d5xc4 b4-b5 Qd6-d5 b5xc6 Qd5xc6
Ra3-c3 Qc6xa4 Ba2xc4 a7-a5 Bc4-b3 Qa4-d7 Rc3-c5) -0.61/19 0} Rf8+ {(Ra8-g8
Qg5-h6 Rg8xg3 Qh6-f8+ Rg3-g8 Qf8-f2 Qd4-g7 Nc3xd5 Rg8-f8 Nd5-f4 Nc6-e5
d2-d4 Ne5-f3 Bb3-d5 Nf3xd4 Bd5xe4 b7-b6 Bc1-e3 c7-c5 Be3-d2 b6-b5 Ra1-e1
b5-b4 Qf2-g2 Qg7-h6) 0.00/18 19} 20. Qf4 {(Qg5-f4 Rf8xf4+ g3xf4 Nc6-e7
a2-a4 c7-c6 Nc3-e2 Qd4-b4 Ra1-a3 Ne7-f5 Bb3-a2 Kh8-g7 c2-c3 Qb4-d6 b2-b4
h7-h5 c3-c4 d5xc4 b4-b5 Qd6-d5 b5xc6 Qd5xc6 Ra3-c3 Qc6xa4 Ba2xc4 a7-a5
Bc4-b3 Qa4-d7) -0.63/19 0} Rxf4+ {(Qd4-g7 d2-d4 Nc6xd4 Nc3xd5 Rf8xf4+
Bc1xf4 Nd4xb3 a2xb3 Qg7xb2 Ra1-c1 c7-c6 Nd5-e7 Qb2-c3 Ne7-f5 Kh8-g8 Nf5-e3
b7-b5 Rc1-d1 a7-a5 Rd1-d8+ Kg8-f7 Rd8-a8 a5-a4 b3xa4 Qc3-a1+ Kf1-e2 b5xa4
Ra8-a7+ Kf7-g8 Ra7-a8+ Kg8-f7) +0.30/22 40} 21. gxf4 {(g3xf4 Nc6-e7 a2-a4
c7-c6 Nc3-e2 Qd4-b4 Ra1-a3 Ne7-f5 Bb3-a2 Kh8-g7 c2-c3 Qb4-d6 b2-b4 h7-h5
c3-c4 d5xc4 b4-b5 Qd6-d5 b5xc6 Qd5xc6 Ra3-c3 Qc6xa4 Ba2xc4 a7-a5 Bc4-b3)
-0.78/18 0} Ne7 {(Nc6-b4 Nc3-e2 Qd4-c5 Ne2-c3 Qc5-d6 a2-a3 Qd6xf4+ Kf1-g1
Qf4-g5+ Kg1-h2 Qg5-h6+ Kh2-g2 Qh6-a6 Kg2-f2 Qa6-f6+ Kf2-g2 Nb4-c6 Bb3xd5
Qf6-f3+ Kg2-g1 Nc6-e5 d2-d3 Qf3-g3+ Kg1-f1 e4xd3 c2xd3 Ne5xd3 Kf1-e2
Nd3xc1+ Ra1xc1 c7-c6 Bd5-c4 Qg3-g2+ Ke2-d3 Qg2xb2 Rc1-g1 h7-h5) +0.69/21
143} 22. Ne2 {(Nc3-e2 Qd4-b6 Bb3-a4 Kh8-g8 b2-b4 Qb6xb4 Ba4-b3 Kg8-f7
Ra1-b1 Qb4-d6 Kf1-f2 Qd6-f6 Bb3-a4 Qf6-h4+ Kf2-f1 Qh4-h3+ Kf1-e1 b7-b6
Rb1-b3 Qh3-h1+ Ke1-f2 Qh1-h2+ Kf2-e1 d5-d4 Ba4-b5 Ne7-f5) -1.10/19 40} Qb6
{(Qd4-b6 d2-d3 e4-e3 Kf1-e1 d5-d4 Ke1-d1 Qb6-h6 Bc1-d2 e3xd2 Kd1xd2 Qh6-h2
Ra1-g1 h7-h5 Rg1-g5 h5-h4 Kd2-d1 Qh2-h3 Kd1-e1 Ne7-c6 Bb3-a4 Qh3-e6)
+1.28/19 0} 23. d3 {(d2-d3 e4-e3 Kf1-e1 d5-d4 Ke1-d1 c7-c5 Bb3-c4 Kh8-g7
b2-b4 Qb6-h6 Bc1-d2 e3xd2 Kd1xd2 c5xb4 Ra1-g1+ Kg7-f6 Rg1-g5 Ne7-f5 Bc4-d5
Qh6-h3 Bd5-e4 Nf5-d6 Rg5-e5 Nd6xe4+ Re5xe4 h7-h5 Ne2xd4 h5-h4 Re4-e6+
Kf6-f7 Re6-e2) -4.31/20 237} e3 {(Qb6-h6 d3xe4 d5xe4 Bc1-d2 Qh6-h3+ Kf1-f2
Qh3-f3+ Kf2-e1 Qf3-h1+ Ke1-f2 Qh1-h2+ Kf2-e1 Qh2-h1+) +2.05/19 39} 24. Ke1
{(Kf1-e1 d5-d4 Ke1-d1 c7-c5 Bb3-c4 Kh8-g7 c2-c3 Qb6-c6 Bc1-d2 e3xd2 Kd1xd2
d4xc3+ b2xc3 h7-h5 Ra1-g1+ Kg7-h6 Rg1-g5 h5-h4 Rg5-e5 Qc6-c7 Bc4-b3 b7-b6
d3-d4 c5xd4 c3xd4 h4-h3 Re5-e3 Qc7-d7 f4-f5) -4.27/18 28} d4 {(d5-d4 Ke1-d1
Qb6-c6 Ne2xd4 Qc6-g2 Bc1xe3 Qg2-f1+ Kd1-d2 Qf1xa1 Nd4-e6 Ne7-c6 f4-f5
Qa1-f1 Bb3-d5 Qf1xf5 Ne6-f4 h7-h5 b2-b4 Kh8-g7 a2-a3 h5-h4 Nf4-e6+ Kg7-f6
Be3-g5+ Kf6-f7 Ne6xc7+ Kf7-g7 Bg5-e3 Qf5-e5 Nc7-e6+ Kg7-f6 Ne6-f4 Qe5-b2
Be3-f2) +2.05/18 0} 25. Kd1 {(Ke1-d1 c7-c5 Bc1-d2 e3xd2 Kd1xd2 a7-a5 Ra1-b1
a5-a4 Bb3-c4 Ne7-f5 Rb1-g1 h7-h5 Kd2-c1 h5-h4 Rg1-g8+ Kh8-h7 Rg8-g5 Nf5-e3
Rg5-h5+ Kh7-g7 Rh5xh4 Ne3xc4 d3xc4 Qb6-b4 Rh4-g4+ Kg7-f6 Kc1-b1 Qb4xc4
Ne2-c1 a4-a3 b2xa3 Qc4-b5+ Nc1-b3 Qb5-e2 Rg4-g1 b7-b6) -4.53/19 25} Qc6
{(Ne7-f5 Bc1-d2 e3xd2 Kd1xd2 Qb6-b4+ c2-c3 Qb4-e7 Ra1-g1 Qe7-e3+ Kd2-e1
h7-h5 Rg1-g8+ Kh8-h7 Rg8-g5 Qe3xd3 Bb3-f7 Nf5-h4 Rg5xh5+ Kh7-g7 Rh5xh4
Kg7xf7 c3xd4 Qd3-b1+ Ke1-f2 Kf7-g6 Rh4-g4+ Kg6-f6 Rg4-g3 Qb1xa2 Rg3-a3
Qa2xb2 Ra3xa7 c7-c6 Kf2-e3 Qb2-b3+ Ke3-d2 Kf6-f5 Ra7-a8 Qb3-d5 Ra8-f8+
Kf5-g4) +2.62/19 37} 26. Nxd4 {(Ne2xd4 Qc6-g2 Bc1xe3 Qg2-f1+ Kd1-d2 Qf1xa1
Nd4-e2 Ne7-f5 Be3-c5 b7-b6 Bc5-b4 h7-h5 Bb3-e6 Nf5-g7 Bb4-c3 Kh8-h7 Be6-d5
h5-h4 Bd5-e4+ Kh7-h6 Ne2-c1 Ng7-h5 Bc3-e5 Nh5-g3 Be4-g2 c7-c5 a2-a3 Kh6-g6
Bg2-h3 Qa1-b1 Bh3-g2 Ng3-f5) -6.01/19 36} Qg2 {(Qc6-g2 Bc1xe3 Qg2-f1+
Kd1-d2 Qf1xa1 Nd4-e6 Ne7-c6 f4-f5 Qa1-f1 Bb3-d5 Qf1xf5 Ne6-f4 Kh8-g7 c2-c3
h7-h5 Bd5-e4 Qf5-a5 a2-a4 h5-h4 b2-b3 Kg7-f7 Be4-d5+ Kf7-f6 Bd5-g2 a7-a6
d3-d4 Nc6-d8 d4-d5 Nd8-f7 Nf4-e6) +2.62/18 0} 27. Bxe3 {(Bc1xe3 Qg2-f1+
Kd1-d2 Qf1xa1 Nd4-e2 Ne7-f5 Be3-c5 b7-b6 Bc5-b4 h7-h5 Bb3-e6 Nf5-g7 Bb4-c3
h5-h4 Bc3-e5 Kh8-h7 Be6-d5 Kh7-h6 Ne2-c1 Ng7-f5 Bd5-e4 Nf5-e3 f4-f5 Ne3-f1+
Kd2-d1 Qa1-b1 Be5-f4+ Kh6-g7 Kd1-e1 Nf1-g3 Bf4-e5+ Kg7-f8) -6.22/19 42}
Qh1+ {(Qg2-f1+ Kd1-d2 Qf1xa1 Nd4-e6 Ne7-c6 f4-f5 Qa1-f1 Bb3-d5 Qf1xf5
Ne6-f4 Kh8-g7 c2-c3 h7-h5 Bd5-e4 Qf5-a5 a2-a4 h5-h4 b2-b3 Kg7-f7 Be4-d5+
Kf7-f6 Bd5-g2 a7-a6 d3-d4 Nc6-d8 Nf4-d5+ Kf6-f5 Be3-f4 c7-c5 Bg2-h3+
Kf5-g6) +2.71/18 30} 28. Ke2 {(Kd1-e2 Qh1xa1 Nd4-b5 Ne7-f5 Be3xa7 Qa1-c1
Nb5xc7 Qc1xf4 Nc7-d5 Qf4-e5+ Nd5-e3 Kh8-g7 Ke2-f3 h7-h5 Ne3xf5+ Qe5xf5+
Kf3-g2 b7-b6 Ba7-b8 Qf5-f6 a2-a4 Qf6xb2 Bb8-f4 Qb2-f6 Kg2-g3 Kg7-g6 Bf4-e3
Qf6-e5+ Be3-f4) -5.53/17 18} Qxa1 29. Ne6 {(Nd4-e6 Ne7-c6 Ne6-d8 Qa1xb2
Nd8xc6 b7xc6 Be3xa7 h7-h5 Ba7-f2 Qb2-a3 Bf2-h4 Kh8-g7 Bh4-g5 Kg7-g6 Ke2-f3
Kg6-f5 Bb3-g8 Qa3-a8 Bg8-h7+ Kf5-e6 c2-c4 Qa8xa2 Bh7-g8+ Ke6-d7 f4-f5
Qa2-c2 Bg8-e6+ Kd7-e8 d3-d4 h5-h4 f5-f6 Qc2-d3+ Bg5-e3) -5.67/18 54} Nc6
{(h7-h5 Be3xa7 Ne7-c6 Ba7-f2 Qa1xb2 Ke2-f3 Kh8-h7 Ne6xc7 Nc6-a5 Bb3-d5
Qb2xc2 Bd5-e4+ Kh7-g7 Nc7-e8+ Kg7-f7 Ne8-d6+ Kf7-f6 Nd6-e8+ Kf6-e7 Ne8-g7
Na5-c6 Ng7-f5+ Ke7-f6 Bf2-h4+ Kf6-e6 a2-a3 Qc2-b3 Bh4-g5 Ke6-d7 Nf5-g7
Nc6-d4+ Kf3-g3) +2.73/17 35} 30. Nd8 {(Ne6-d8 Qa1xb2 Nd8xc6 b7xc6 Be3xa7
h7-h5 Ba7-f2 Qb2-a3 Bf2-e3 Kh8-g7 Be3-d4+ Kg7-h7 Ke2-f3 Kh7-g6 Bd4-e5
Kg6-f5 Bb3-g8 Qa3-c1 Bg8-h7+ Kf5-e6 d3-d4 Qc1-d1+ Kf3-e3 h5-h4 f4-f5+
Ke6-f7 Bh7-g6+ Kf7-g8 Ke3-f4 Qd1xc2 Kf4-g4 c6-c5 d4xc5 Qc2-e2+ Kg4-f4
Qe2-c4+ Kf4-g5 Qc4xc5) -5.89/18 29} Qxb2 {(Qa1xb2 Nd8xc6 b7xc6 Be3xa7 h7-h5
Ba7-f2 Kh8-h7 a2-a4 Kh7-g6 a4-a5 Qb2-a3 Bb3-e6 Qa3xa5 f4-f5+ Kg6-g5 Bf2-e3+
Kg5-f6 Be3-d4+ Kf6-e7 Ke2-f3 h5-h4 Bd4-f2 Qa5-a4 Be6-c4 h4-h3 Bf2-h4+
Ke7-d6 Bh4-g3+ Kd6-d7 Kf3-g4) +3.06/16 0} 31. Nxc6 {(Nd8xc6 b7xc6 Be3xa7
h7-h5 Ba7-f2 Qb2-a3 Ke2-f3 Kh8-g7 f4-f5 Qa3-b4 Bb3-c4 Qb4-c3 a2-a4 Qc3-a1
a4-a5 Qa1xa5 Bf2-d4+ Kg7-f8 Kf3-f4 Qa5-d2+ Bd4-e3 Qd2xc2 f5-f6 Qc2-h2+
Kf4-e4 Qh2-g2+ Ke4-e5 Qg2-e2 Ke5-f4 Qe2-g4+ Kf4-e5 Qg4-g3+ Be3-f4 Qg3-e1+
Ke5-f5 Qe1-f2 Kf5-g5) -6.47/19 22} bxc6 {(Qb2-g7 Be3-d4 b7xc6 Bd4xg7+
Kh8xg7 Bb3-a4 c6-c5 Ba4-c6 Kg7-h6 Ke2-f3 Kh6-g7 Kf3-g4 Kg7-f6 Bc6-e4 h7-h6
Kg4-h5 Kf6-g7 a2-a4 a7-a5 c2-c3 c5-c4 d3xc4 c7-c5 Be4-b1 Kg7-f6 Kh5xh6)
+3.46/20 19} 32. Bxa7 {(Be3xa7 h7-h5 Ba7-f2 Qb2-a3 Ke2-f3 Kh8-g7 Bf2-d4+
Kg7-g6 Bb3-e6 c6-c5 Bd4-e5 Qa3-c1 a2-a4 Qc1xc2 f4-f5+ Kg6-g5 f5-f6 Qc2xd3+
Kf3-f2 Qd3-c2+ Kf2-e3 Qc2xa4 f6-f7 Qa4-a3+ Ke3-d2 c5-c4 Be6xc4 h5-h4 Be5xc7
Qa3-e7 Bc7-e5 Kg5-f5 Be5-h2 Kf5-g6 Kd2-d3 Kg6-g7) -6.81/19 52} h5 {(Qb2-g7
Bb3-e6 Qg7-c3 Be6-b3 h7-h5 Ba7-f2 Qc3-g7 Bb3-e6 Qg7-b2 Ke2-d2 Qb2-b4+
Kd2-e2 Qb4xf4 Be6-d7 Qf4-f6 Bf2-e3 Qf6-c3 Ke2-d1 Kh8-g7 Be3-c1) +3.44/18
24} 33. Bf2 {(Ba7-f2 Qb2-a3 Bf2-h4 Kh8-g7 f4-f5 Qa3-b4 f5-f6+ Kg7-f8 Bb3-c4
Qb4-c3 Ke2-f1 Qc3-a1+ Kf1-g2 Qa1-c1 Bc4-b3 Qc1-f4 Bh4-g3 Qf4xf6 a2-a3 h5-h4
Bg3-h2 Kf8-e8 a3-a4 Qf6-g5+ Kg2-h3 Ke8-d7 Bb3-c4 Qg5-d2) -6.92/18 22} Qf6
{(Kh8-g7 a2-a4 Kg7-g6 a4-a5 Qb2-a3 Bb3-e6 Qa3xa5 Bf2-d4 Qa5-a4 Ke2-e3
Qa4xc2 f4-f5+ Kg6-h6 f5-f6 c6-c5 Bd4-e5 Qc2-c1+ Ke3-e2 Qc1-g5 Be5-c3
Qg5-g2+ Ke2-e3 Qg2-g3+ Ke3-e2 Qg3-d6 Be6-c4 h5-h4 f6-f7 h4-h3 Ke2-f3 h3-h2
Kf3-g2 Qd6-f4 Bc4-d5 Kh6-g6 Kg2-h1 Qf4-d6) +4.80/20 33} 34. Kf3 {(Ke2-f3
Kh8-g7 a2-a4 Kg7-g6 a4-a5 Qf6-a1 Bb3-e6 Qa1xa5 f4-f5+ Kg6-g5 Bf2-e3+ Kg5-f6
Be3-d4+ Kf6-e7 Bd4-f2 Qa5-a4 Bf2-c5+ Ke7-f6 Kf3-e3 Qa4xc2 Bc5-d4+ Kf6-e7
Be6-c4 Qc2-c1+ Ke3-e4 Qc1-g5 Bd4-c5+ Ke7-e8 Bc5-e3 Qg5-e7+ Ke4-f4 h5-h4
Be3-d4 h4-h3 f5-f6 Qe7-b4 Bd4-g1 Ke8-f8 Kf4-g3) -8.19/18 51} Qf5 {(Qf6-g6
Kf3-e3 Qg6-g4 Bb3-a4 Qg4-h3+ Ke3-e2 Qh3-g2 Ba4-b3 h5-h4 Bb3-e6 h4-h3 Be6xh3
Qg2xh3 Bf2-d4+ Kh8-h7 Bd4-e5 Qh3-h2+ Ke2-d1 Qh2-g1+ Kd1-d2 Kh7-g6 Kd2-c3
Qg1-c5+ Kc3-b3 Qc5-b5+ Kb3-c3 c6-c5 a2-a3 Qb5-a4 Be5xc7 Qa4xa3+ Kc3-d2
Kg6-f5 Bc7-d6 Qa3-a8 Kd2-e3 Qa8-g2 Bd6xc5 Qg2xc2) +5.63/20 24} 35. Bd4+
{(Bf2-d4+ Kh8-h7 Bd4-e5 Qf5-g4+ Kf3-e3 h5-h4 f4-f5 Qg4xf5 d3-d4 h4-h3
Be5-h2 Qf5-g5+ Ke3-d3 Qg5-g6+ Kd3-c3 Qg6-g2 Bh2xc7 h3-h2 Bc7xh2 Qg2xh2
a2-a4 Kh7-g6 Kc3-d3 Qh2-f2 c2-c3 Kg6-f6 Bb3-d1 Kf6-e7 Bd1-e2 Ke7-d6)
-10.98/17 39} Kh7 36. Be5 {(Bd4-e5 h5-h4 a2-a4 Qf5-h5+ Kf3-e4 h4-h3 f4-f5
Qh5-e2+ Ke4-d4 h3-h2 Be5xh2 Qe2xh2 Kd4-c4 Kh7-g7 d3-d4 Qh2-f4 c2-c3 Qf4xf5
Kc4-b4 Qf5-f8+ Kb4-c4 Kg7-f6 Bb3-c2 Qf8-f7+ Kc4-b4 Qf7-e7+ Kb4-b3 c6-c5
d4xc5 Qe7xc5 Bc2-e4 Kf6-e6) -12.73/18 12} h4 {(Qf5-g4+ Kf3-e3 h5-h4 f4-f5
h4-h3 Be5xc7 Qg4xf5 d3-d4 h3-h2 Bc7xh2 Qf5-h3+ Ke3-d2 Qh3xh2+ Kd2-d3
Qh2-h3+ Kd3-d2 Kh7-g6 a2-a4 Kg6-f6 c2-c3 Kf6-e7 Bb3-c2 Qh3-g2+ Kd2-d3
Ke7-d6 Bc2-b3 Qg2-f3+ Kd3-c4 Qf3-f4 Kc4-d3 Qf4-f5+ Kd3-c4 Qf5-f4) +5.87/21
31} 37. a3 {(a2-a3 Qf5-h5+ Kf3-e4 h4-h3 f4-f5 h3-h2 Be5xh2 Qh5-e2+ Ke4-f4
Qe2xh2+ Kf4-e3 Qh2-e5+ Ke3-d2 Qe5xf5 a3-a4 Qf5-f2+ Kd2-c1 Kh7-g7 Bb3-c4
Qf2-e1+ Kc1-b2 Qe1-b4+ Bc4-b3 Qb4-d4+ Kb2-c1 Kg7-f6 Kc1-d1 Kf6-e5 Kd1-d2
Qd4-c5 c2-c3 Qc5-f2+ Kd2-d1 Qf2-f1+ Kd1-d2 Qf1-g2+) -13.83/18 16} h3
{(Qf5-h5+ Kf3-e4 h4-h3 f4-f5 h3-h2 Be5xh2 Qh5-e2+ Ke4-d4 Qe2xh2 a3-a4
Kh7-g7 Kd4-c3 Qh2-e5+ Kc3-b4 Qe5-e1+ Kb4-c4 Qe1-a5 d3-d4 Kg7-f6 Kc4-d3
Qa5xf5+ Kd3-d2 Qf5-g5+ Kd2-d3 Kf6-e7 c2-c3 Ke7-d6 Bb3-c4 c6-c5 d4xc5+
Kd6xc5 Bc4-b3 Qg5-f5+ Kd3-d2 Kc5-b6 Bb3-c2 Qf5-g5+ Kd2-d3 Qg5-d5+ Kd3-e3)
+7.29/20 23} 38. Kg3 {(Kf3-g3 Qf5-h5 Bb3-e6 h3-h2 Be6-g4 Qh5-g6 Kg3xh2
Qg6xg4 a3-a4 Kh7-g6 a4-a5 Kg6-f5 Kh2-h1 Qg4-d1+ Kh1-g2 Qd1xc2+ Kg2-g3
Qc2xd3+ Kg3-f2 Qd3-d2+ Kf2-f3 Qd2xa5 Kf3-e3 Qa5-a3+ Ke3-d4 Qa3-b4+ Kd4-d3
c6-c5 Kd3-c2 c5-c4 Be5-c3 Qb4-b3+ Kc2-d2 Kf5xf4 Bc3-e5+) -18.67/22 122} Qh5
39. Ba4 {(Bb3-a4 h3-h2 Ba4xc6 Qh5-g6+ Kg3xh2 Qg6xc6 c2-c4 Qc6-h6+ Kh2-g3
Qh6-g6+ Kg3-f2 Qg6xd3 Be5xc7 Qd3xc4 Bc7-e5 Kh7-g6 Kf2-e3 Kg6-f5 Ke3-d2
Kf5-e4 a3-a4 Qc4-a2+ Kd2-c1 Qa2xa4 Kc1-d2 Qa4-b3 Be5-c3 Ke4xf4 Kd2-d3
Kf4-f3 Kd3-d2 Qb3-c4 Kd2-d1 Kf3-e4 Kd1-c2 Qc4-a4+ Kc2-d2 Qa4-b3 Bc3-h8
Qb3-d3+ Kd2-c1 Qd3-f1+ Kc1-b2 Qf1-g2+ Kb2-c3 Qg2-g3+ Kc3-c4 Qg3-g8+ Kc4-c5)
-19.19/22 102 White resigns} *
[/pgn]