Deep trap

[Look]

Hi,

Following an online game, the play reached to this position:

[d]b1r3r1/2qkbpQp/pP1pp3/N7/2P5/4B3/5PPP/R4RK1 w - - 1 24

White played the intuitive Qxg8 and was in a forced mate line later. Even though he could have evaded the mate.

[pgn]
[Event "Rated Blitz game"]
[ECO "B42"]
[Opening "Sicilian Defense: Kan Variation, Modern Variation"]
[Termination "Normal"]
[Annotator "lichess.org"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 { B42 Sicilian Defense: Kan Variation, Modern Variation } Qc7 6. O-O Nf6 7. a4 b6 8. c4 Bb7 9. Nc3 d6 10. Nb3 Nbd7 11. a5 Rc8 12. axb6 Nxb6 13. Na5 Ba8 14. Be3 Be7 15. Na4 Nbd7 16. Nc3 Nc5 17. b4 Ncxe4 18. Nxe4 Nxe4 19. Bxe4 Bxe4 20. Qd4 Ba8 21. Qxg7 Rf8 22. b5 Kd7 23. b6 Rg8 24. Qxg8 Rxg8 25. bxc7 Rxg2+ 26. Kh1 Rxf2+ 27. Kg1 Rg2+ 28. Kh1 Rg3+ { White resigns. } 0-1
[/pgn]

[Leo]

I like deep traps.

[Dann Corbit]

The blunder was not here:
[d]b5r1/2qkbp1p/pP1pp3/N7/2P5/4B3/5PPP/R4RK1 w - - acd 30; acs 16; bm Rfb1; c3 "bxc7"; ce -160; pm Rfb1; pv Rfb1 Rxg2+ Kf1 Qb8 b7 Rxh2 Ke2 Rh5 Ba7 Qxa7 b8=Q Re5+ Kf1 Qxb8 Rxb8 Be4 Rb6 Bf6 Ra3 Rf5 Rxa6 Bd4 Nb3 Bxf2 Ke2 Kc7 R6a4 Bb6 c5 Bf3+ Kd2 dxc5 Na5 Kc8 Rd3 Bd5 Nc4 Bc7 Ne3 Rf4 Rxf4 Bxf4 Ke2;

Which was almost surely lost anyway.

The blunder for white was here:
[d]b1r2r2/2qkbpQp/p2pp3/NP6/2P5/4B3/5PPP/R4RK1 w - - acd 36; acs 363; bm Qh6; c3 "b6"; ce 283; pm Qh6; pv Qh6 axb5 cxb5 Qc2 Rfc1 Qe4 Nc6 Bxc6 bxc6+ Ke8 Qh5 Qe5 Qd1 Qd5 Qa4 f6 c7+ Kf7 Qd7 e5 Qf5 Rg8 g3 Qe6 Qxh7+ Rg7 Qh5+ Rg6 h3 f5 Kh2 Kf6 Rab1 f4 gxf4 Qf5 fxe5+ Qxe5+ Qxe5+ Kxe5 Rb8 Rgg8 Rxc8 Rxc8 Kg3 Kf5 f4 Ke6 h4 d5 Kg4 Kd7 h5 Bd6;

The game is won with Qh6 but b6 gives all the advantage and then some back to black. A full piece blunder.

The full game by move with analysis:

Code: Select all

rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - acd 53; acs 4579200; bm d4; c0 "e4"; c2 "perft 1 20 perft 2 400 perft 3 8902 perft 4 197281 perft 5 4865609 perft 6 119060324"; c3 "e4"; c4 "c4"; cce 38; ce 24; id "Fundamental Opening Position"; pm e4 {2379495} d4 {1725526} Nf3 {483679} c4 {479713} g3 {39820} f4 {35589} b3 {27764} Nc3 {13010} e3 {2686} b4 {2458} g4 {2450} c3 {1654} d3 {1649} a3 {1150} h3 {717} a4 {552} h4 {425} f3 {363} Nh3 {82} Na3 {28}; pv d4 Nf6 c4 e6 Nf3 b6 a3 Bb7 Nc3; white_wins 1826279; black_wins 1425008; draws 1430947; Opening Fundamental opening position; 
rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - acd 48; acs 212911; bm e6; c0 "d5"; c3 "c5"; c4 ""; cce -38; ce -16; id "es-dc-neutral.0005"; pm c5 {1218905} e5 {412609} e6 {257916} c6 {204175} d5 {78062} d6 {71821} g6 {57457} Nf6 {46929} Nc6 {20542} b6 {4882} a6 {1853} g5 {987} h6 {878} a5 {501} h5 {447} Na6 {410} f6 {336} f5 {276} Nh6 {273} b5 {241}; pv e6 d4 d5 Nd2 c5 Ngf3 Nf6 exd5 exd5 Bb5+ Bd7 Bxd7+ Nbxd7 O-O Be7 dxc5 Nxc5 Nb3 Nce4 Nfd4 O-O Nf5 Re8 Nxe7+ Rxe7 Nd4 Rc8 Re1 Nd6 Rxe7 Qxe7 Bf4 a6 Bxd6 Qxd6 c3 g6 g3 Ne4 Kg2 Qb6 Qb3 Qxb3; white_wins 874667; black_wins 685852; draws 642462; Opening ECO:B00; Opening: King's pawn opening; 1. e4 *; 
rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq - acd 39; acs 2877; bm Nf3; c3 "Nf3"; c4 "Nc3"; cce 29; ce 14; id "es-dc-neutral.0001"; pm Nf3 {985387} Nc3 {97297} c3 {81458} f4 {8522} d4 {8027} Ne2 {7615} d3 {7365} g3 {5548} b3 {5485} c4 {3255} Bc4 {2574} b4 {1485} a3 {1393} a4 {1002} h3 {637} Na3 {523} Be2 {317} Qf3 {271} Bd3 {184} Qe2 {125} f3 {125} Bb5 {102} e5 {76} h4 {65} Qh5 {47} Nh3 {14} Ke2 {6} Qg4 {3} g4 {3}; pv Nf3 d6 Nc3 e5 Bc4 Be7 d3 Nf6 h3 O-O O-O Nc6 Bd2 h6 a4 a6 Nd5 Nxd5 Bxd5 Be6 c3 Rc8 Re1 Bf6 Be3 Bxd5 exd5 Ne7 c4 Qd7 Rb1 Nf5 b4 Nxe3 fxe3 cxb4 Rxb4 Bd8 e4 Bf6; white_wins 455845; black_wins 380012; draws 321955; Opening Sicilian Defense: General. 1.e4 c5; CaxtonID: 2099; ECO: B20-; 
rnbqkbnr/pp1ppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq - acd 37; acs 1045; bm d6; c3 "e6"; c4 "e6"; cce -32; ce -16; id "es-dc-neutral.0014"; pm d6 {493525} Nc6 {251116} e6 {227189} g6 {17677} a6 {9061} Nf6 {5454} b6 {1422} Qc7 {792} Qa5 {470} h6 {324} d5 {273} Qb6 {108} f5 {100} f6 {69} Nh6 {65} e5 {41} h5 {10} a5 {5} c4 {4}; pv d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Be2 e6 O-O Be7 Qd3 O-O a4 Bd7 Rd1 Nc6 Nxc6 Bxc6 a5 Qc7 Be3 Rac8 Bb6 Qb8 Bd4 d5 e5 Nd7 f4 Bb4 Qe3 Rfd8 f5 exf5 e6 Nf6 e7 Re8; white_wins 379885; black_wins 310077; draws 264647; Opening Sicilian Defense: Misc. Defenses. 1.e4 c5 2.Nf3; CaxtonID: 2139; ECO: B27; 
rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq - acd 40; acs 3230; bm d4; c3 "d4"; c4 "d4"; cce 37; ce 22; id "ATG_Reg_19-015"; pm d4 {173117} Nc3 {21160} c3 {12445} d3 {9578} b3 {5026} c4 {4020} g3 {1377} Be2 {926} Qe2 {722} b4 {457} Bb5 {225} Bc4 {175} Na3 {67} Bd3 {63} e5 {28} a3 {27} Nd4 {18} a4 {5} h3 {5}; pv d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Be2 d6 O-O Be7 Qd3; white_wins 85372; black_wins 67231; draws 67999; Opening Sicilian Defense: French Variation. 1.e4 c5 2.Nf3 e6; CaxtonID: 2095; ECO: B40; 
rnbqkbnr/pp1p1ppp/4p3/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq - acd 39; acs 598; bm cxd4; c3 "cxd4"; c4 "cxd4"; cce -40; ce -24; id "C.A.P. 445466"; pm cxd4 {176085} d5 {263} a6 {226} Nf6 {116} b6 {50} Nc6 {47} d6 {31} Be7 {24} Qa5+ {19} Qb6 {14} Ne7 {6} Qc7 {6} g6 {6} h5 {5} c4 {4} Na6 {1} h6 {1}; pv cxd4 Nxd4 Nf6 Nc3 d6 Be3 a6 a3 e5 Nf3 Be7 Bc4 O-O O-O Nbd7 a4 Qc7 Qe2 Nc5 Nd5 Nxd5 Bxd5 Be6 Bxc5 Qxc5 Rfd1 Rac8 c3 Qc7 a5 g6 Qe3 Kg7 Rd3 Bxd5 Rxd5 f5 Nd2 Qc6 Qd3 fxe4; white_wins 66660; black_wins 51443; draws 51388; Opening ECO:B40i; Sicilian: 2...e6 3.d4; 1.e4 c5 2.Nf3 e6 3.d4 *; 
rnbqkbnr/pp1p1ppp/4p3/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq - acd 37; acs 1099; bm Nxd4; c3 "Nxd4"; c4 "Nxd4"; cce 39; ce 15; id "es-dc-neutral.0566"; pm Nxd4 {175550} c3 {455} Bc4 {230} Qxd4 {127} Be2 {57} Bg5 {14} Bd3 {3} Bf4 {1} Ke2 {1} Nc3 {1} Ng1 {1} c4 {1}; pv Nxd4 Nf6 Nc3 Nc6 Nxc6 bxc6 e5 Nd5 Ne4 Qc7 f4 Qa5+ c3 Be7 Bd3 Ba6 O-O Qb6+ Rf2 O-O Bxa6 Qxa6 b3 f5 exf6 Bxf6 Bb2 Qb6 g3 a5 Rb1 Qe3 Qe1 Qxe1+ Rxe1 a4 c4 Bxb2 Rxb2 Nf6 Rd2 axb3 Nxf6+ gxf6 axb3; white_wins 66369; black_wins 51383; draws 51322; Opening Sicilian Defense: French Variation. Open 1.e4 c5 2.Nf3 e6 3.d4 cxd4; CaxtonID: 2097; ECO: B40; 
rnbqkbnr/pp1p1ppp/4p3/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq - acd 38; acs 3601; bm Nf6; c3 "a6"; c4 "Nc6"; cce -40; ce -12; pm a6 {68977} Nc6 {58705} Nf6 {41449} d6 {2414} Qb6 {1964} Bc5 {1422} Qc7 {803} Bb4+ {27} g6 {19} d5 {8} e5 {7} b6 {4} Ne7 {3} Qh4 {3} a5 {3} Ba3 {2} Be7 {2} Qa5+ {2} f6 {1}; pv Nf6 Bd3 Be7 O-O d6 Be3 Nc6 Nxc6 bxc6 c4 O-O Nc3 Rb8 b3 Qc7 Rc1 e5 Qe2 Rd8 f3 Nd7 Na4 Nb6 Nxb6 axb6 Rcd1 Be6 Qf2 Bf6 a4 Rb7 f4 exf4 Qxf4 Be5; white_wins 66155; black_wins 51102; draws 51204; Opening ECO:B40l; Sicilian: Open, 2...e6, 4.Nxd4; 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 *; 
rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq - acd 37; acs 2906; bm Bd3; c3 "Bd3"; cce 34; ce 33; id "ATG_Reg_19-012"; pm Bd3 {36361} Nc3 {25983} c4 {4138} Be2 {1239} Be3 {393} g3 {355} Nd2 {286} a3 {102} f4 {60} Nb3 {59} a4 {37} Bc4 {23} c3 {22} Bf4 {21} f3 {5} b3 {4} g4 {4} h3 {4} Qd3 {2} Qe2 {2} Bd2 {1} Bxa6 {1} Nf3 {1}; pv Bd3 d5 Nd2 Nc6 Nxc6 bxc6 b3 Nf6 Bb2 Bb4 O-O O-O c3 Ba5 Qe2 Bb7 Rad1 c5 c4 d4 e5 Nd7 Be4 Rb8 Bxb7 Bxd2 Be4 Bf4 Bxh7+ Kh8 Be4 g6 g3 Bxe5 Bc6 Bf6 Be4 Kg8 f4; white_wins 25888; black_wins 20751; draws 19873; Opening Sicilian Defense: Kan Variation. 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6; CaxtonID: 2109; ECO: B41; 
rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/3B4/PPP2PPP/RNBQK2R b KQkq - acd 37; acs 3780; bm d5; c3 "Qc7"; cce -47; ce -27; pm Nf6 {14740} Bc5 {11545} Qc7 {2686} Nc6 {2435} g6 {2171} Qb6 {1116} Ne7 {649} d6 {607} d5 {189} b5 {131} b6 {76} Bd6 {37} Be7 {5} e5 {3}; pv d5 exd5 Qxd5 O-O Nd7 Be3 Bc5 c4 Qd6 Be2 Ne7 Qd2 b6 Nc3 Bb7 Rfd1 Rd8 Na4 O-O Nxc5 Nxc5 Qc2 e5 Nb3 Qc6 Bf3 Rxd1+ Rxd1 e4 Nxc5 exf3 Nd7 Re8 g3 Nc8 c5 Qc7 Bg5 bxc5; white_wins 14081; black_wins 10351; draws 10738; Opening Sicilian Defense: Kan Variation. Modern Variation 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3; CaxtonID: 2114; ECO: B42; 
rnb1kbnr/1pqp1ppp/p3p3/8/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq - acd 37; acs 3601; bm O-O; c3 "O-O"; cce 69; ce 24; pm O-O {2013} Nc3 {412} Qe2 {98} c4 {77} Be3 {66} f4 {22} Nd2 {4} a4 {3} c3 {3} Nb3 {2}; pv O-O Nf6 Re1 Bd6 h3 Nc6 Nf3 O-O Qe2 Ne5 Nxe5 Bxe5 Nd2 d6 Nc4 Nd7 Bd2 b6 Nxe5 Nxe5 Bc3 Bb7 Qe3 Nd7 Be2 Nc5 f3 Rac8 a4 e5 Red1 a5 Qd2; white_wins 1154; black_wins 745; draws 731; Opening ECO:B42d; Sicilian: Kan, 5.Bd3 Qc7; 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Qc7 *; 
rnb1kbnr/1pqp1ppp/p3p3/8/3NP3/3B4/PPP2PPP/RNBQ1RK1 b kq - acd 36; acs 472; bm Nf6; c3 "Nf6"; cce -77; ce -20; pm Nf6 {1460} Nc6 {344} Bc5 {54} d6 {47} b5 {39} g6 {26} Ne7 {23} Bd6 {15} b6 {4}; pv Nf6 Qe2 Bd6 h3 Nc6 Nxc6 dxc6 a4 e5 Nd2 Bc5 Rd1 O-O Nf3 Re8 a5 h6 Bd2 Be6 Bc3 Bd6 Bc4 Qe7 Bxe6 Qxe6 Rd2 Rad8 Rad1 Bc7 Rxd8 Rxd8 Rxd8+ Bxd8 Nd2 Nd7 b4 c5 b5 axb5 Qxb5; white_wins 869; black_wins 530; draws 563; 
rnb1kb1r/1pqp1ppp/p3pn2/8/3NP3/3B4/PPP2PPP/RNBQ1RK1 w kq - acd 36; acs 277; bm Qe2; c3 "a4"; cce 50; ce 19; pm Qe2 {4981} Nc3 {1197} c4 {994} Kh1 {481} Be3 {204} Nd2 {146} f4 {114} Re1 {59} Bg5 {28} b3 {22} c3 {19} Nb3 {13} a4 {9} Nf3 {6} Qe1 {1} Qf3 {1} g3 {1}; pv Qe2 Bd6 h3 Nc6 Nxc6 dxc6 a4 e5 Nd2 Bc5 Bc4 O-O Nb3 Be7 a5 h6 Bd2 Bd7 Bc3 Rad8 Nd2 Bc5 Rfe1 Bc8 Nf3 Rfe8 b4 Bd6 Rad1 c5 b5 axb5 Bxb5 Bd7 Bxd7 Rxd7 a6; white_wins 3280; black_wins 2373; draws 2401; Opening ECO:B42l; Sicilian: Kan, 5.Bd3 Nf6 6.O-O Qc7; 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Nf6 6.O-O Qc7 *; 
rnb1kb1r/1pqp1ppp/p3pn2/8/P2NP3/3B4/1PP2PPP/RNBQ1RK1 b kq - acd 30; acs 268; bm Be7; c3 "b6"; cce 34; ce -12; pm b6 {5} Nc6 {4} Be7 {3} Bc5 {1}; pv Be7 Bg5 h6 Bh4 O-O Nd2 d6 Re1 Rd8 Qe2 e5 Nf5 Bxf5 exf5 Nbd7 c4 Rac8 Ne4 Qb6 a5 Qb4 Bxf6 Nxf6 Nxf6+ Bxf6 Be4 Rc7 Bd5 Bg5 Qe4 Qxb2 Rab1; white_wins 3; black_wins 4; draws 6; 
rnb1kb1r/2qp1ppp/pp2pn2/8/P2NP3/3B4/1PP2PPP/RNBQ1RK1 w kq - acd 30; acs 185; bm Nd2; c3 "c4"; cce -266; ce 58; pm Nc3 {2} Qe2 {2} Be3 {1}; pv Nd2 Nc6 Nxc6 dxc6 Qf3 Nd7 Nc4 b5 axb5 cxb5 Na5 Rb8 Qg3 Bd6 Qxg7 Bxh2+ Kh1 Be5 Qh6 Rg8 f4 Bd6 Bd2 Bf8 Qh5 Nc5 Qxh7 Rg7 Qh3 f5 Qh5+ Qf7 Qxf7+ Rxf7 Rae1 Nxd3 cxd3 fxe4 dxe4 Bc5 Be3 Bb4 Nc6 Bxe1 Nxb8; white_wins 1; black_wins 4; draws 0; 
rnb1kb1r/2qp1ppp/pp2pn2/8/P1PNP3/3B4/1P3PPP/RNBQ1RK1 b kq - acd 30; acs 54; bm Nc6; c3 "Bb7"; ce 0; pm Nc6; pv Nc6 Nxc6 dxc6 a5 bxa5 Nc3 Bd6 f4 e5 f5 Bc5+ Kh1 Bd4 Ne2 Bc5 Nc3;
rn2kb1r/1bqp1ppp/pp2pn2/8/P1PNP3/3B4/1P3PPP/RNBQ1RK1 w kq - acd 30; acs 54; bm Nc3; c3 "Nc3"; ce 0; pm Nc3; pv Nc3 Bd6 h3 O-O Be3 Bh2+ Kh1 Bf4 Qe2 Bxe3 Qxe3 d6 Rad1 Rd8 Kg1 Nbd7 b3 Qc5 Rd2 Qb4 Bc2 Rac8 Re1 Qc5 Red1 h6 Qg3 Nh5 Qe3 Nhf6;
rn2kb1r/1bqp1ppp/pp2pn2/8/P1PNP3/2NB4/1P3PPP/R1BQ1RK1 b kq - acd 30; acs 90; bm Bd6; c3 "d6"; ce -17; pm Bd6; pv Bd6 h3 Bc5 Nb3 Bb4 Qe2 Nc6 f4 d6 Be3 Na5 Nxa5 bxa5 Bd4 O-O Bxf6 gxf6 Qg4+ Kh8 Qh4 Qd8 Kh2 Rb8 Rad1 Rg8 g4 Bxc3 bxc3 Bc6 Rb1 Rxb1 Rxb1 Bxa4;
rn2kb1r/1bq2ppp/pp1ppn2/8/P1PNP3/2NB4/1P3PPP/R1BQ1RK1 w kq - acd 30; acs 120; bm Be3; c3 "Nb3"; ce 25; pm Be3; pv Be3 Nbd7 Nb3 Be7 a5 bxa5 Nxa5 O-O b3 Ne5 Bd4 Nxd3 Qxd3 Rfc8 Rfd1 Rab8 Ba7 Ra8 Be3 Nd7 Bd4 Rab8 Qg3 Bf6 Bxf6 Nxf6 Qe3 Ba8 f3 Nd7 Qd4 Nc5 Qxd6;
rn2kb1r/1bq2ppp/pp1ppn2/8/P1P1P3/1NNB4/1P3PPP/R1BQ1RK1 b kq - acd 30; acs 30; bm Nc6; c3 "Nbd7"; ce 0; pm Nc6; pv Nc6 Be3 Be7 Be2 Nd7 Nd4 O-O Nxc6 Qxc6 Rc1 Qc7 Qd2 Rfd8 Rfd1 Nc5 Qc2 Nd7 Qd2;
r3kb1r/1bqn1ppp/pp1ppn2/8/P1P1P3/1NNB4/1P3PPP/R1BQ1RK1 w kq - acd 30; acs 72; bm a5; c3 "a5"; ce 19; pm a5; pv a5 Be7 axb6 Qxb6 Na5 O-O Qe2 Ne5 Bc2 Nfd7 Be3 Qc7 Bd4 Rac8 b3 Bf6 Rfd1 Rfd8 Qe3 Nc6 Bxf6 Nxf6 Nxc6 Qxc6 Rd2 Qc5 Qxc5 dxc5 Rad1 Rxd2 Rxd2 Bc6 Rd6 h6 f4 Ng4 g3;
r3kb1r/1bqn1ppp/pp1ppn2/P7/2P1P3/1NNB4/1P3PPP/R1BQ1RK1 b kq - acd 30; acs 33; bm Be7; c3 "Rc8"; ce -25; pm Be7; pv Be7 axb6 Qxb6 Na5 Ne5 Be3 Qc7 Be2 O-O f3 Nc6 Nxc6 Qxc6 Bd4 a5 b3 Nd7 Qd2 Rfd8 Rfd1 Nc5 Ra3 h6 Qb2 Bg5 Nb5 a4 b4 Nb3 Bf2 Bf6;
2r1kb1r/1bqn1ppp/pp1ppn2/P7/2P1P3/1NNB4/1P3PPP/R1BQ1RK1 w k - acd 30; acs 63; bm axb6; c3 "axb6"; ce 47; pm axb6; pv axb6 Qxb6 Be3 Qc7 Na5 Ba8 b4 Be7 Nb3 Bb7 b5 axb5 Nxb5 Qd8 Bd4 O-O Na5 Ba8 f3 Nc5 Bc2 Nfd7 Qd2 Rb8 Rfd1 Qc8 Qc3 e5 Bf2 Rb6 Qd2 h6 Be3 Qd8 Nb3 Bb7;
2r1kb1r/1bqn1ppp/pP1ppn2/8/2P1P3/1NNB4/1P3PPP/R1BQ1RK1 b k - acd 30; acs 35; bm Qxb6; c3 "Nxb6"; ce -86; pm Qxb6; pv Qxb6 Be3 Qc7 Na5 Be7 b4 Ba8 Nb3 Bb7 b5 axb5 Nxb5 Qd8 Be2 O-O Nxd6 Bxd6 Qxd6 Nxe4 Qb4 Bc6 Nd4 Rb8 Qe1 Bb7 Nb5 Qe7 Ra7 e5 f3 Nec5 Qg3 Rfd8 Rd1 Ra8;
2r1kb1r/1bq2ppp/pn1ppn2/8/2P1P3/1NNB4/1P3PPP/R1BQ1RK1 w k - acd 30; acs 69; bm Na5; c3 "Na5"; ce 96; pm Na5; pv Na5 Nbd7 b4 Be7 b5 Ra8 Be3 O-O b6 Qc8 Qe2 Ne5 Bc2 Nc6 Nxb7 Qxb7 f4 Nd7 Rab1 a5 e5 dxe5 fxe5 Ndxe5 c5 Kh8 h3 Rad8 Rbd1 f5 Rxd8 Rxd8 Rd1 Rxd1+ Bxd1 Nb4;
2r1kb1r/1bq2ppp/pn1ppn2/N7/2P1P3/2NB4/1P3PPP/R1BQ1RK1 b k - acd 30; acs 45; bm Nbd7; c3 "Ba8"; ce -68; pm Nbd7; pv Nbd7 b4 Be7 b5 Ra8 Be3 O-O b6 Qc8 Qe2 Rb8 Rfb1 Ba8 Bc2 Bd8 Na4 Nxe4 Qd1 Bf6 Ra2 d5 Rc1 d4 Bxd4 Bxd4 Qxd4 e5 Qe3 Nec5 Nxc5 Qxc5 Qxc5 Nxc5 Rb1 Rfd8 Rab2 Bb7 Nxb7 Rxb7 f3;
b1r1kb1r/2q2ppp/pn1ppn2/N7/2P1P3/2NB4/1P3PPP/R1BQ1RK1 w k - acd 30; acs 77; bm Bf4; c3 "Be3"; ce 109; pm Bf4; pv Bf4 Be7 c5 Qxc5 Bxa6 Rb8 Bb5+ Nbd7 Qa4 Qc7 Rfc1 O-O Nd5 Qd8 Nb4 Qb6 Nbc6 Bxc6 Nxc6 Nc5 Nxe7+ Kh8 Rxc5 Qxc5 Bf1 Rxb2 Be3 Qb4 Qxb4 Rxb4 f3 Rb7 Nc6 d5 e5 Nd7 Be2 h6 Bd4 Rc7 Bb5 Rfc8 Ra7 Rxa7;
b1r1kb1r/2q2ppp/pn1ppn2/N7/2P1P3/2NBB3/1P3PPP/R2Q1RK1 b k - acd 30; acs 222; bm Be7; c3 "Be7"; ce -36; pm Be7; pv Be7 Bd4 O-O Qd2 Ng4 Be2 Ne5 b3 Nbd7 f4 Nc6 Nxc6 Bxc6 Rxa6 Nc5 Bxc5 dxc5 Nb5 Qb8 Bd3 Bb7 Ra7 Rcd8 Qe2 e5 fxe5 Rd7 e6 fxe6 Rxf8+ Qxf8 Qe3 e5 Be2 Bc6;
b1r1k2r/2q1bppp/pn1ppn2/N7/2P1P3/2NBB3/1P3PPP/R2Q1RK1 w k - acd 30; acs 122; bm b4; c3 "Na4"; ce 42; pm b4; pv b4 O-O Qe2 Nbd7 Bf4 g6 Rfc1 Rfd8 c5 Nh5 Be3 dxc5 Bxa6 Rb8 bxc5 Nxc5 Na4 Qxa5 Nxc5 Qb4 f3 Bf6 Ra4 Qb2 Ra2 Qe5 g3 Qd6 Kg2 Bc6 Rd2 Qe5 Rdc2 Qd6 Nxe6 Bxe4;
b1r1k2r/2q1bppp/pn1ppn2/N7/N1P1P3/3BB3/1P3PPP/R2Q1RK1 b k - acd 30; acs 73; bm Nbd7; c3 "Nbd7"; ce 17; pm Nbd7; pv Nbd7 Nc3 O-O Bd4 Nc5 Re1 Rb8 b3 Rfc8 Qe2 Nxd3 Qxd3 Nd7 Qg3 g6 Qe3 Nc5 Reb1 e5 Bxc5 Qxc5 Qe1 Bd8 Nd5 Kg7 Rd1 Bxd5 Rxd5 Qb4 Qxb4 Rxb4 Rxd6 Bxa5 Rxa5 Rxb3 f3 Rxc4;
b1r1k2r/2qnbppp/p2ppn2/N7/N1P1P3/3BB3/1P3PPP/R2Q1RK1 w k - acd 30; acs 47; bm Nc3; c3 "Nc3"; ce -8; pm Nc3; pv Nc3 O-O Bd4 Rb8 b3 Nc5 Re1 Rfc8 Qd2 Nxd3 Qxd3 Nd7 Qg3 g6 Qe3 Nc5 Reb1 e5 Bxc5 Qxc5 Qe1 Bd8 Nd5 f5 exf5 gxf5 Rd1 Qa7 b4 Qg7 Qc3 f4 Nb3 Qg6 Rd2 f3 g3 Qe4 Ne3 Qg6 Rxa6;
b1r1k2r/2qnbppp/p2ppn2/N7/2P1P3/2NBB3/1P3PPP/R2Q1RK1 b k - acd 30; acs 67; bm Rb8; c3 "Nc5"; ce 8; pm Rb8; pv Rb8 Bd4 Nc5 b3 O-O Re1 Nxd3 Qxd3 Nd7 Qg3 g6 Qe3 Nc5 Reb1 e5 Bxc5 Qxc5 Nd5 Bd8 Rd1 Qxe3 Nxe3 Bxe4 Rxd6 Bb6 Nd5 Bxd5 cxd5 Bxa5 Rxa5 Rxb3 g3 Ra8 Rdxa6 Rxa6 Rxa6 Rb1+ Kg2 Rd1 Ra5 Kg7 d6 Rxd6 Rxe5;
b1r1k2r/2q1bppp/p2ppn2/N1n5/2P1P3/2NBB3/1P3PPP/R2Q1RK1 w k - acd 30; acs 34; bm Bxc5; c3 "b4"; ce 0; pm Bxc5; pv Bxc5 dxc5 Nb3 Bd6 g3 Qb7 f4 O-O Bc2 Be7 Ra2 Rfd8 Qe2 Nd7 Rfa1 Nb8 h3 Qd7 Qf2 Bb7 Na5 Ba8 Nb3;
b1r1k2r/2q1bppp/p2ppn2/N1n5/1PP1P3/2NBB3/5PPP/R2Q1RK1 b k - acd 30; acs 88; bm Nxd3; c3 "Ncxe4"; ce 29; pm Nxd3; pv Nxd3 Qxd3 d5 c5 Ng4 g3 Qe5 Rfd1 Qh5 h4 O-O exd5 Bf6 Rac1 Ne5 Qe4 Nf3+ Kg2 Bxc3 Qxf3 Qxf3+ Kxf3 Bxb4 Nc6 Bxc6 dxc6 Rxc6 Rd6 Rxd6 cxd6 Bxd6 Rc6 Be5 Rxa6 g6 g4 Rb8 Ra5 Bc7 Ra3 Kg7 Bd4+ e5 Bc3;
b1r1k2r/2q1bppp/p2ppn2/N7/1PP1n3/2NBB3/5PPP/R2Q1RK1 w k - acd 30; acs 52; bm Qa4+; c3 "Nxe4"; ce 119; pm Qa4+; pv Qa4+ Qd7 Qxd7+ Kxd7 Na4 Bd8 f3 Bxa5 bxa5 Nc5 Bxc5 dxc5 Nb6+ Kc7 Nxc8 Rxc8 Bc2 Rd8 Rad1 Nd7 Kf2 Bc6 Rfe1 h6 f4 g5 f5 e5 g3 h5 h4 gxh4 gxh4 Rb8 Rb1 Rd8 Be4 Bxe4 Rxe4 Nf6 Re2 Ng4+ Kg3;
b1r1k2r/2q1bppp/p2ppn2/N7/1PP1N3/3BB3/5PPP/R2Q1RK1 b k - acd 30; acs 32; bm Bxe4; c3 "Nxe4"; ce -96; pm Bxe4; pv Bxe4 Bxe4 Nxe4 Qd3 d5 cxd5 exd5 Rac1 Qd7 Rxc8+ Qxc8 Rc1 Qd7 Nc6 Bf6 f3 Nd6 Qxd5 Nb5 Qc5 Qd6 Qxd6 Nxd6 Nb8 Ke7 Nxa6 Ra8 Nc7 Ra3 Bc5 Ra1 Rf1 Kd7 Nd5 Rxf1+ Kxf1 Ba1 Ke2 Kc6 Ne3 Be5 g3 Nb7 Bf8 Nd6;
b1r1k2r/2q1bppp/p2pp3/N7/1PP1n3/3BB3/5PPP/R2Q1RK1 w k - acd 30; acs 26; bm Bxe4; c3 "Bxe4"; ce 135; pm Bxe4; pv Bxe4 Bxe4 Qd4 Bxg2 Kxg2 Bf6 Qb6 Qxb6 Bxb6 Bxa1 Rxa1 d5 c5 Kd7 c6+ Rxc6 Nxc6 Kxc6 Bc5 Ra8 Ra5 e5 Kf3 Kb7 Ke3 Rd8 Kd3 f6 h4 h5 Ra1 Rd7 Rg1 Kc6 Bf8 Kb5 Rxg7;
b1r1k2r/2q1bppp/p2pp3/N7/1PP1B3/4B3/5PPP/R2Q1RK1 b k - acd 30; acs 54; bm Bxe4; c3 "Bxe4"; ce -125; pm Bxe4; pv Bxe4 Qd4 d5 Qxg7 Rf8 Rac1 Qb8 cxd5 Bxd5 Bf4 Qa8 h3 Kd7 Qa1 Rg8 g3 Rxc1 Rxc1 Rc8 Qa4+ Kd8 Rd1 f6 b5 Bc5 Nb3 axb5 Qxa8 Bxf2+ Kxf2 Rxa8 Nd4 Ra2+ Rd2 Rxd2+ Bxd2 Bc4 Bb4 Ke8;
2r1k2r/2q1bppp/p2pp3/N7/1PP1b3/4B3/5PPP/R2Q1RK1 w k - acd 30; acs 81; bm Qd4; c3 "Qd4"; ce 186; pm Qd4; pv Qd4 Bxg2 Kxg2 Bf6 Qd2 Bxa1 Rxa1 Rb8 c5 Rd8 c6 O-O Qd4 Rc8 Rc1 e5 Qa7 Qxa7 Bxa7 Rfe8 c7 Kf8 Rc6 Ke7 Bb8 Rxb8 cxb8=Q Rxb8 Rxa6 Rb5 Kf3 Ke6 Nc6 Kd5 Kg4 Kc4 Kf5;
2r1k2r/2q1bppp/p2pp3/N7/1PPQb3/4B3/5PPP/R4RK1 b k - acd 30; acs 34; bm d5; c3 "Ba8"; ce -191; pm d5; pv d5 Qxg7 Rf8 Rac1 Bxb4 cxd5 Bc3 Bd4 Bxd4 Rxc7 Bxg7 Rxc8+ Kd7 Rxf8 Bxf8 dxe6+ Kxe6 Re1 Kd5 Rd1+ Ke6 Rd4 Bd5 Rh4 h6 Nc4 Bc6 g3 f6 Na5 Bb5 Kg2 Kf7 Kf3 Bc5 Nb3 Bb6 Nd4 Bxd4 Rxd4 a5 Ke3 a4;
b1r1k2r/2q1bppp/p2pp3/N7/1PPQ4/4B3/5PPP/R4RK1 w k - acd 30; acs 70; bm Qxg7; c3 "Qxg7"; ce 169; pm Qxg7; pv Qxg7 Rf8 b5 Qd8 b6 Bf6 Qg4 Bxa1 Rxa1 f5 Qh5+ Rf7 b7 Bxb7 Nxb7 Qe7 Na5 Qf6 Rb1 f4 Bd2 Qf5 Qxf5 Rxf5 Rb6 Rh5 Rxd6 Rd8 Rxd8+ Kxd8 Nb3 e5 f3 Kc7 Nc5 Kb6 Nd3 a5 Bc3 Kc6 Bxe5 a4;
b1r1k2r/2q1bpQp/p2pp3/N7/1PP5/4B3/5PPP/R4RK1 b k - acd 30; acs 15; bm Rf8; c3 "Rf8"; ce -179; pm Rf8; pv Rf8 b5 Qd8 b6 Bf6 Qg4 Bxa1 Rxa1 f5 Qh5+ Rf7 b7 Bxb7 Nxb7 Qe7 Na5 Qf6 Rb1 f4 Bd2 Qf5 Qxf5 Rxf5 Rb6 Rh5 Rxd6 Rd8 Rxd8+ Kxd8 f3 e5 Nc6+ Kc7 Nb4 Kb6 Nd3 a5 Bc3 a4 Bb4 Kc6 Nc5;
b1r1kr2/2q1bpQp/p2pp3/N7/1PP5/4B3/5PPP/R4RK1 w - - acd 30; acs 13; bm b5; c3 "b5"; ce 182; pm b5; pv b5 Qd8 b6 Bf6 Qg4 Bxa1 Rxa1 f5 Qh5+ Rf7 b7 Bxb7 Nxb7 Qe7 Na5 Qf6 Rb1 f4 Bd2 Qf5 Qxf5 Rxf5 Rb6 Rh5 Rxd6 Rd8 Rxd8+ Kxd8 f3 e5 Nc6+ Kc7 Nb4 Kb6 g4 Rh6 Nd3 a5 Nxe5 Re6 Nd3 a4 Bb4 Rc6 Ne5 Re6 Nd7+ Kc6 Nc5;
b1r1kr2/2q1bpQp/p2pp3/NP6/2P5/4B3/5PPP/R4RK1 b - - acd 30; acs 25; bm Qd8; c3 "Kd7"; ce -205; pm Qd8; pv Qd8 b6 Bf6 Qg4 Bxa1 Rxa1 f5 Qh5+ Rf7 b7 Bxb7 Nxb7 Qe7 Na5 Qf6 Rb1 f4 Bd2 Qf5 Qxf5 Rxf5 Rb6 Ke7 g4 fxg3 hxg3 Rf3 Be3 Rff8 Kg2 Rg8 Rxa6 Ra8 Nc6+ Kd7 Rb6 e5 c5;
b1r2r2/2qkbpQp/p2pp3/NP6/2P5/4B3/5PPP/R4RK1 w - - acd 36; acs 363; bm Qh6; c3 "b6"; ce 283; pm Qh6; pv Qh6 axb5 cxb5 Qc2 Rfc1 Qe4 Nc6 Bxc6 bxc6+ Ke8 Qh5 Qe5 Qd1 Qd5 Qa4 f6 c7+ Kf7 Qd7 e5 Qf5 Rg8 g3 Qe6 Qxh7+ Rg7 Qh5+ Rg6 h3 f5 Kh2 Kf6 Rab1 f4 gxf4 Qf5 fxe5+ Qxe5+ Qxe5+ Kxe5 Rb8 Rgg8 Rxc8 Rxc8 Kg3 Kf5 f4 Ke6 h4 d5 Kg4 Kd7 h5 Bd6;
b1r2r2/2qkbpQp/pP1pp3/N7/2P5/4B3/5PPP/R4RK1 b - - acd 30; acs 19; bm Rg8; c3 "Rg8"; ce 55; pm Rg8; pv Rg8 g3 Rxg7 bxc7 Rxc7 Rfb1 d5 Rd1 Rg8 Rab1 Bc5 cxd5 Bxd5 Nc4 Ke7 Nb6 Bxb6 Bxb6 Rc2 Ra1 Bf3 Rdb1 Be2 Be3 Bb5 Rb4 h5 Rh4 Rh8 g4 Rg8 g5 Be2 Rb4 Rgc8 Rb7+ R2c7 Rxc7+ Rxc7 Kg2 Ke8 Kg3;
b1r3r1/2qkbpQp/pP1pp3/N7/2P5/4B3/5PPP/R4RK1 w - - acd 30; acs 14; bm bxc7; c3 "Qxg8"; ce -70; pm bxc7; pv bxc7 Rxg7 g3 Rxc7 Rfb1 d5 Rb8 Rc8 Rxc8 Kxc8 Ra4 Rg8 Nb3 dxc4 Rxc4+ Kd7 Nc5+ Bxc5 Rxc5 Bd5 Ra5 Rb8 Kf1 Rb1+ Ke2 Bc4+ Kf3 Bb5 g4 Kd6 Ra3 Rb2 h3 Kd5 Kg3 Rc2 Ra1;
b1r3Q1/2qkbp1p/pP1pp3/N7/2P5/4B3/5PPP/R4RK1 b - - acd 30; acs 20; bm Rxg8; c3 "Rxg8"; ce 161; pm Rxg8; pv Rxg8 Rfb1 Rxg2+ Kf1 Qb8 b7 Rxh2 Ke2 Rh5 Ba7 Qxa7 b8=Q Re5+ Kf1 Qxb8 Rxb8 Be4 Ra3 Kc7 Rg8 Rf5 Re3 Bf3 Rg7 Bh5 Nb3 Rf4 Rxh7 Bg6 Rg7 Bh4 f3 Bf6 Rg8 Rxc4 Rxg6 fxg6 Rxe6;
b5r1/2qkbp1p/pP1pp3/N7/2P5/4B3/5PPP/R4RK1 w - - acd 30; acs 16; bm Rfb1; c3 "bxc7"; ce -160; pm Rfb1; pv Rfb1 Rxg2+ Kf1 Qb8 b7 Rxh2 Ke2 Rh5 Ba7 Qxa7 b8=Q Re5+ Kf1 Qxb8 Rxb8 Be4 Rb6 Bf6 Ra3 Rf5 Rxa6 Bd4 Nb3 Bxf2 Ke2 Kc7 R6a4 Bb6 c5 Bf3+ Kd2 dxc5 Na5 Kc8 Rd3 Bd5 Nc4 Bc7 Ne3 Rf4 Rxf4 Bxf4 Ke2;
b5r1/2Pkbp1p/p2pp3/N7/2P5/4B3/5PPP/R4RK1 b - - acd 13; acs 0; bm Rxg2+; c3 "Rxg2+"; ce 32756; dm 6; pm Rxg2+; pv Rxg2+ Kh1 Rxf2+ Nc6 Bxc6+ Kg1 Rg2+ Kh1 Rg3+ Rf3 Bxf3#;
b7/2Pkbp1p/p2pp3/N7/2P5/4B3/5PrP/R4RK1 w - - acd 11; acs 0; bm Kh1; c3 "Kh1"; ce -32757; dm -5; pm Kh1; pv Kh1 Rxf2+ Nc6 Bxc6+ Kg1 Rg2+ Kh1 Rg3+ Rf3 Bxf3#;
b7/2Pkbp1p/p2pp3/N7/2P5/4B3/5PrP/R4R1K b - - acd 11; acs 0; bm Rxf2+; c3 "Rxf2+"; ce 32758; dm 5; pm Rxf2+; pv Rxf2+ Nc6 Bxc6+ Kg1 Rg2+ Kh1 Rg3+ Rf3 Bxf3#;
b7/2Pkbp1p/p2pp3/N7/2P5/4B3/5r1P/R4R1K w - - acd 9; acs 0; bm Nc6; c3 "Kg1"; ce -32759; dm -4; pm Nc6; pv Nc6 Bxc6+ Kg1 Rg2+ Kh1 Rg3+ Rf3 Bxf3#;
b7/2Pkbp1p/p2pp3/N7/2P5/4B3/5r1P/R4RK1 b - - acd 9; acs 0; bm Rg2+; c3 "Rg2+"; ce 32760; dm 4; pm Rg2+; pv Rg2+ Kh1 Rg3+ Nc6 Bxc6+ Rf3 Bxf3#;
b7/2Pkbp1p/p2pp3/N7/2P5/4B3/6rP/R4RK1 w - - acd 7; acs 0; bm Kh1; c3 "Kh1"; ce -32761; dm -3; pm Kh1; pv Kh1 Rg3+ Nc6 Bxc6+ Rf3 Bxf3#;
b7/2Pkbp1p/p2pp3/N7/2P5/4B3/6rP/R4R1K b - - acd 7; acs 0; bm Rg3+ Rg4+ Rg5+ Rg6+ Rg7+ Rg8+; c3 "Rg3+"; ce 32762; dm 3; pm Rg3+ Rg4+ Rg5+ Rg6+ Rg7+ Rg8+; pv Rg3+ Nc6 Bxc6+ Rf3 Bxf3#;
b7/2Pkbp1p/p2pp3/N7/2P5/4B1r1/7P/R4R1K w - - acd 5; acs 0; bm Nc6; ce -32763; dm -2; pm Nc6; pv Nc6 Bxc6+ Rf3 Bxf3#;

[Dann Corbit]

I see that the position in question was actually this one (I reanalyzed it a bit deeper):
[d]b1r3r1/2qkbpQp/pP1pp3/N7/2P5/4B3/5PPP/R4RK1 w - - acd 37; acs 351; bm g3; c3 "Qxg8"; ce -91; pm g3; pv g3 Rxg7 bxc7 Rxc7 Rfb1 Rg8 Rb6 Bf3 Rxa6 Rb8 c5 Rb4 c6+ Bxc6 Nxc6 Rxc6 Ra7+ Rc7 Rxc7+ Kxc7 Kg2 Rb7 Ra6 d5 Bd4 Bd6 f4 Rb4 Ra7+ Kb8 Rd7 Rxd4 Rxd6 Kc7 Ra6 Kb7 Rd6 Rc4 Kf3 Rc3+ Ke2 Kc7 Ra6 Rc2+ Kd3 Rxh2 Ra7+ Kd6 Rxf7;

Choosing g3 over Qxg8 loses about 3/4 of a pawn, so it is a blunder of sorts, but White is already behind.