110 Most Fantastic Moves

[David Dahlem]

I found another page with the "best moves" ever played.

http://www.ajschess.com/lifemasteraj/best_moves.html

[Dann Corbit]

http://www.xs4all.nl/~timkr/chess/fant100.htm

Is there an epd test suite of these 110 positions? If not, i may try to create such a suite.

I have found quite a few alternative solutions already.
When the analysis is finished, I will post it.

[jdart]

Arasan did not solve #1 even after 45 minutes:

[D] rnq2rk1/1pn3bp/p2p2p1/2pPp1PP/P1P1Pp2/2N2N2/1P1B1P2/R2QK2R b KQ -

I am not sure Nc6 is correct.

[Marc MP]

Arasan did not solve #1 even after 45 minutes:

[D] rnq2rk1/1pn3bp/p2p2p1/2pPp1PP/P1P1Pp2/2N2N2/1P1B1P2/R2QK2R b KQ -

I am not sure Nc6 is correct.

Jon,

This is a list of spectacular moves.... many of them are incorrect. Here the story says that Spassky thought his position was strategically compromised so he preferred to sac his knight to get practical chances.

[Dann Corbit]

These are the 51 difficult problems in the set.
For each problem, I analyzed the base position, and also the position after the key move has been made.

For several problems, the proposed solution is clearly wrong (or equivalently there is an alternative solution that is just as good or better).

For several problems, they are very hard to solve.

There are a couple of "Wall" problems (akin to WAC.230) that the computers simply do not understand. In at least one case, the alternative move proposed by the computer also leads to a draw.

So here is the current analysis I have created for the hard ones:

Code: Select all

rnq2rk1/1pn3bp/p2p2p1/2pPp1PP/P1P1Pp2/2N2N2/1P1B1P2/R2QK2R b KQ - acd 26; ce -123; bm Nd7; id "Pos.1 Averbakh-Spassky, Leningrad 1956"; c0 "original position"; pv Nd7 Nh4 Qe8 Qg4 Nb6 b3 Qf7 hxg6 hxg6 a5 Nc8 Na4 Rd8 Nb6 Rb8 O-O-O Na8 Nxc8 Rdxc8 Qh3 Qe8 Nf3 Kf7 Qg4 Nc7 Kb2 Kf8 Rh7 b5 a5xb6/ep Rb8xb6 Kb2a2 Rc8b8;
r1q2rk1/1pn3bp/p1np2p1/2pPp1PP/P1P1Pp2/2N2N2/1P1B1P2/R2QK2R w KQ - acd 26; ce 257; bm dxc6; id "Pos.1 Averbakh-Spassky, Leningrad 1956"; c0 "after making move Nc6"; pv dxc6 bxc6 a5 Qg4 Qe2 Rab8 hxg6 hxg6 Nh4 Qe6 Na4 Rf7 O-O-O Bf8 Kb1 Rh7 Bc3 Qf7 Nb6 Na8 Nxa8 Rxa8 Nf3 Rb8 Ka2 Qb7 Rxh7 Qxh7 Qd3 Rb7 Bd2 Qh5;
2kr3N/pbpq4/1p2p2b/3pPp2/2nP1n2/P1NB1QP1/1PP2B1P/R3K2R b KQ - acd 27; ce -141; bm Nxd3+; id "Pos.101 Bogdanovic-Planinc, Novi Sad 1965"; c0 "original position"; pv Nxd3+ cxd3 Rxh8 Qe2 Na5 b4 Nc6 h4 Kb8 Kd1 Rg8 h5 Rg4 Rh4 Rg8 Kc2 Qe7 Kb2 a6 Rah1 Qg5;
2kr3N/pbpq4/1p2p2b/3pPp2/3P1n2/P1NB1QP1/1PPn1B1P/R3K2R w KQ - acd 25; ce 167; bm Kxd2; id "Pos.101 Bogdanovic-Planinc, Novi Sad 1965"; c0 "after making move Nd2"; pv Kxd2 Nxd3+ Ke2 Nxf2 Kxf2 Rxh8 a4 c5 Ne2 a5 h4 Rg8 h5 Kb8 c3 Qc7 Rh4 Qc6 Nf4 Ba6 Kg2 Bc4 Ng6 Qd7 dxc5 bxc5 Qf2 Qb7 Kh2 Be3 Qc2 Bh6;
1nrqk2r/p3bpp1/bpn1p3/3pP2p/3P4/PP3N1P/1B2NPP1/RB1QR1K1 b k - acd 25; ce -84; bm Na5; id "Pos.104 Filguth-Kortchnoi, Sao Paulo 1979"; c0 "original position"; pv Na5 Bd3 Bxd3 Qxd3 Nbc6 Rf1 O-O Nf4 h4 Bc1 Qc7 Bd2 Nb8 Ra2 Qb7 Qb1 Rfe8 Re1 Nd7 Qd3 a6 Nh5 g6 Bxa5 bxa5 Nf4 Qb5;
1nrq3r/p2kbpp1/bpn1p3/3pP2p/3P4/PP3N1P/1B2NPP1/RB1QR1K1 w - - acd 25; ce 61; bm b4; id "Pos.104 Filguth-Kortchnoi, Sao Paulo 1979"; c0 "after making move Kd7"; pv b4 g5 Nh2 Bc4 Ng3 h4 Ngf1 a5 bxa5 Nxa5 Nd2 Ke8 Ng4 Nbc6 a4 Ba6 Qf3 Nb4 Bc3 Nbc6 Bd3 Nc4 Qe2 Nb4 Bxc4 dxc4 Bxb4 Bxb4 Nf6+ Kf8;
1rb2rk1/p1p3pp/2pb4/3p4/3Pp3/4B2q/PPPQBP1P/2KR3R b - - acd 27; ce 118; bm Bb4; id "Pos.106 Bird-Morphy, London 1858"; c0 "original position"; pv Bb4 c3 Bd6 Rdg1 Be6 Kb1 a5 Ka1 g6 Bd1 Rb6 Bc2 Bg4 Bg5;
1rb3k1/p1p3pp/2pb4/3p4/3Pp3/4B2q/PPPQBr1P/2KR3R w - - acd 27; ce -26; bm Bxf2; id "Pos.106 Bird-Morphy, London 1858"; c0 "after making move Rxf2"; pv Bxf2 Qa3 c3 Qxa2 b4 Qa1+ Kc2 Qa4+ Kc1 Bf5 Be1 Qa1+ Kc2 e3+ Kb3 exd2 Rxa1 dxe1=Q Rhxe1 Bxh2 Rxa7 Bd6 Bd1 g5 Rg1 Bf4 Re1 Kf7 Ra6 Bd7 Rh1 Kg7 Bh5 Rf8 Rg1 h6 Kb2 Kf6 Ra7 Be6;
r4b1r/p1P3pp/1pN1pqb1/1Bkp1p2/P3n2Q/7P/2P3KB/7R w - - acd 23; ce 0; bm Bg1+; id "Pos.107 Braga-Timman, Mar del Plata 1982"; c0 "original position"; pv Bg1+ Kd6 Bh2+ f4 Bxf4+ Kc5 Be3+ Kd6 Bf4+;
rN3b1r/p1P3pp/1p2pqb1/1Bkp1p2/P3n2Q/7P/2P3KB/7R b - - acd 25; ce 0; bm Qxh4; id "Pos.107 Braga-Timman, Mar del Plata 1982"; c0 "after making move Nb8"; pv Qxh4 c8=Q+ Kb4 Rb1+ Ka3 Ra1+ Kb4 Rb1+;
r3k2r/1pp2ppp/pb1p1qn1/4p2b/2B1P3/N2P1NPP/PPP1QPK1/R4R2 b kq - acd 23; ce 370; bm Nh4+; id "Pos.108 Gomes-Neto, Rio 1942"; c0 "original position"; pv Nh4+ gxh4 Rg8 Qd2 Bxf3+ Kh2 Qxh4 Rg1 Bxf2 Qg5 Bxg1+ Qxg1 Qf4+ Qg3 Qd2+ Kg1 Qe3+ Qf2 Qxf2+ Kxf2 Bh5 Rf1 Rf8 Kg3 g6 Kh4 c6 Nb1 b5 Bb3 f6 Nd2 Kd7 Kg3 f5 exf5 Rxf5;
r3k1r1/1pp2ppp/pb1p1qn1/4p2b/2B1P3/N2P1NPP/PPP1QPK1/R4R2 w q - acd 25; ce -304; bm Rae1; id "Pos.108 Gomes-Neto, Rio 1942"; c0 "after making move Rg8"; pv Rae1 Nh4+ Nxh4 Bxe2 Rxe2 O-O-O Bb3 Ba7 Nc4 g5 Nf3 Kb8 Nfd2 h5 Ne3 Rge8 Nf5 Rh8 Ne3 g4 h4 c6 c3 Rd7 Nf5 d5 Rd1 Rhd8 Bc2;
k4b1r/p3pppp/B1p2n2/3rB1N1/7q/8/PPP2P2/R2Q1RK1 w - - acd 24; ce 384; bm Nxf7; id "Pos.12 Rossolimo-Livingstone, New York 1961"; c0 "original position"; pv Nxf7 Rxd1 Rfxd1 Qg4+ Bg3 Nd5 c4 e5 cxd5 Bc5 Rd3 Qa4 Nxh8 Qxa6 Rad1 cxd5 Nf7 d4 Nxe5 Qxa2 b4 Bb6 Nd7 Kb7 Nxb6 Kxb6 Rxd4 Kb5 R4d2 Qa6 Rd7 g5 Rxh7 Kxb4 Rb7+ Kc4 Rc7+ Kb3 Rb1+ Ka2 Rb8 Qa4 Re7;
k4b1r/p3pppp/B1p2n2/3rB1N1/2P4q/8/PP3P2/R2Q1RK1 b - - acd 26; ce 82; bm Qxg5+; id "Pos.12 Rossolimo-Livingstone, New York 1961"; c0 "after making move c4"; pv Qxg5+ Bg3 Rxd1 Rfxd1 Nd7 Rxd7 e5 Kf1 Bc5 b4 Rd8 Rxd8+ Qxd8 bxc5 Qd4 Re1 f6 Kg1 Qd3 Bc8 h5 Be6 g5 Re3 Qd1+ Kg2 h4 Bh2 g4 Bg1 Qd4 Kh1 Qf4 Kg2 Kb7 Bh2 Qd4 Bg1 h3+ Kh1 Kc7 Kh2 Qf4+;
1nbk1b1r/r3pQpp/pq2P3/1p1P2B1/2p5/2P5/5PPP/R3KB1R b KQ - acd 27; ce -16; bm Nd7; id "Pos.13 Sosonko-Rivas, Amsterdam 1978"; c0 "original position"; pv Nd7 Be2 Qd6 exd7 Rxd7 O-O Qxd5 Qh5 h6 Be3 e6 Qh3 Bc5 Bg4 Re8 Rfd1 Qe5 Bxc5 Qxc5 Bxe6 Rxd1+ Rxd1+ Ke7 Re1 Kd8 Rd1+;
1nbk1b1r/3rpQpp/pq2P3/1p1P2B1/2p5/2P5/5PPP/R3KB1R w KQ - acd 26; ce 86; bm Be3; id "Pos.13 Sosonko-Rivas, Amsterdam 1978"; c0 "after making move Rd7"; pv Be3 Qd6 Be2 Bb7 exd7 Nxd7 O-O Bxd5 Qh5 g6 Qh4 Bg7 Rfd1 Bf6 Bg5 Bxc3 Rxd5 Qxd5 Rd1 Qe5 Qh3 Ke8 Qxd7+ Kf7 Be3 Qe6 Qb7 Bf6 h3 Qc8 Qa7 Rd8 Rxd8 Qxd8 Qxa6 Qd5 Bf3 Qf5 Qa3 Kg7 Qb4 c3;
5r2/7k/1pPP3P/8/4p3/3p4/P4R1P/7K b - - acd 25; ce 949; bm Rxf2; id "Pos.14 Gligoric-Stein, Lvov 1962"; c0 "original position"; pv Rxf2 d7 d2 d8=Q Rf1+ Kg2 d1=Q Qe7+ Kxh6 Qh4+ Kg7 Qe7+ Rf7 Qe5+ Rf6 Qe7+ Kg6 Qxe4+ Kf7 Qh7+ Ke6 Qh3+ Kd5 Qd7+ Rd6 Qf5+ Kxc6 Qe4+ Qd5 Qxd5+ Kxd5 a4 Ke5 Kf2 Rd2+ Kg1 Rd4 Kf2 Rxa4;
5r2/7k/1pPP3P/8/8/3pp3/P4R1P/7K w - - acd 28; ce -505; bm Rxf8; id "Pos.14 Gligoric-Stein, Lvov 1962"; c0 "after making move e3"; pv Rxf8 d2 c7 d1=Q+ Kg2 Qg4+ Kf1 Qc4+ Kg1 e2 Kf2 Qe6 Ke1 Qxd6 Rh8+ Kg6 Rd8 Qxc7 Rd2 Qxh2 Rxe2 Qg3+ Kd1 Qf3 Kd2 Qa3 Ke1 Qc1+ Kf2 Kxh6 Kf3 Kg5 Re5+ Kg6 Re2 Kf5 Kf2 Qc3 Kf1 Qd3 Ke1 Kf4 Rd2 Qc3 Kd1 Ke3 Rd6 Qe5 Rh6 Qa1+ Kc2 Qxa2+ Kc3 Qd2+ Kc4;
r2q1rk1/pp2bpp1/4p2p/2pPB2P/2P3n1/3Q2N1/PP3PP1/2KR3R w - - acd 27; ce -28; bm Qe2; id "Pos.17 Karpov-Hübner, Tilburg 1982"; c0 "original position"; pv Qe2 Nxe5 Qxe5 Bf6 Qe2 exd5 Rxd5 Qb6 f3 Rae8 Qc2 Re6 Kb1 Bd4 Rd1 Rfe8 Ne4 a6 g3 Qc6 Qb3 Qc7 Qa4 R8e7 Qa3 Rb6 b3 Rd7 f4;
r2q1rk1/pp2bpB1/4p2p/2pP3P/2P3n1/3Q2N1/PP3PP1/2KR3R b - - acd 25; ce 67; bm Nxf2; id "Pos.17 Karpov-Hübner, Tilburg 1982"; c0 "after making move Bxg7"; pv Nxf2 Qf3 Bg5+ Kb1 Nxd1 Bxf8 Nxb2 Kxb2 Qb6+ Qb3 Bf6+ Kb1 Kxf8 Ne4 Bg7 Rf1 exd5 cxd5 Rd8 d6 Qxb3+ axb3 Be5 Nxc5 Rxd6 Re1 Bd4 Nxb7 Rb6 Re4 Rxb7 Rxd4 Rxb3+ Kc2 Rg3 Rd6 Rxg2+ Kd3 Kg7 Ra6 Rg5 Rxa7 Rxh5 Ke4 Rg5;
r2qk2r/1b3ppp/p2p1b2/2nNp3/1R2P3/2P5/1PN2PPP/3QKB1R w Kkq - acd 25; ce 13; bm Nce3; id "Pos.18 Kasparov-Shirov, Horgen 1994"; c0 "original position"; pv Nce3 O-O Rb6 a5 Nc4 Ra6 Rxb7 Nxb7 Nxe5 Ra8 Nc4 Nc5 Bd3 Re8 O-O g6 Bc2 Bg7 Re1 Rc8 Qe2 Rb8 Qd2 Qd7 Bb1 a4 Ndb6 Qe7 Qxd6 Be5;
r2qk2r/1R3ppp/p2p1b2/2nNp3/4P3/2P5/1PN2PPP/3QKB1R b Kkq - acd 27; ce 6; bm Nxb7; id "Pos.18 Kasparov-Shirov, Horgen 1994"; c0 "after making move Rxb7"; pv Nxb7 Ncb4 Nc5 Qf3 Kf8 Bc4 Rc8 Qf5 Qd7 Qxd7 Nxd7 Bxa6 Rb8 O-O Nc5 Bd3 Bg5 Rd1 g6 g3 h5 h4 Bh6 Kg2 Kg7 Bc2 Rhc8 f3 Rh8 Ra1 Ra8;
8/8/4kpp1/3p1b2/p6P/2B5/6P1/6K1 b - - acd 29; ce 200; bm Be4; id "Pos.2 Topalov-Shirov, Linares 1998"; c0 "original position"; pv Be4 g3 f5 Kf2 Kd6 Bb4+ Kc6 Ba3 Kb5 Ke3 Kc4 Kd2 d4 Bb2 d3 Ba1 Kb3 Bf6 a3 Kc1 a2 Kd2 Ka3 Ba1 Kb4 Kc1 Kb3 Be5 Kc4 Bh8 Bd5 Kd2 Bf3 Bb2 Bc6 Ba1 Be4 Kc1 Bd5 Bb2 Kb4 Ba1 Kb3 Be5 Kc4 Kd2 Bf3 Bb2;
8/8/4kpp1/3p4/p6P/2B4b/6P1/6K1 w - - acd 28; ce -365; bm Kf2; id "Pos.2 Topalov-Shirov, Linares 1998"; c0 "after making move Bh3"; pv Kf2 Kf5 Ke3 Bxg2 Bb2 Be4 Kf2 g5 h5 Kg4 h6 Kh5 Bxf6 Kxh6 Kg3 Kg6 Bd4 a3 Kf2 Kh6 Bc3 Kh5 Ke3 Kg6 Ba1 a2 Bc3 Kf5 Kf2 Kf4 Bg7 Bf5 Bb2 g4 Bc1+ Ke4 Bb2 d4 Ba1;
r2qkb1r/pb1p1p1p/1pn2np1/2p1p3/2P1P3/2NP1NP1/PP3PBP/R1BQ1RK1 w kq - acd 25; ce 41; bm Nd5; id "Pos.20 Zuniga-Seirawan, Buenos Aires 1993"; c0 "original position"; pv Nd5 Bg7 a3 d6 b4 Nxd5 exd5 Nd4 Nxd4 cxd4 Qa4+ Qd7 Qxd7+ Kxd7 a4 h5 f4 f5 fxe5 dxe5 Rb1 Ba6 h4 Rac8 Kh2 Bf6 Bd2 Kd6 b5 Bb7 Bb4+ Kd7;
r2qkb1r/pb1p1p1p/1pn2np1/2p1N3/2P1P3/2NP2P1/PP3PBP/R1BQ1RK1 b kq - acd 26; ce 0; bm Nxe5; id "Pos.20 Zuniga-Seirawan, Buenos Aires 1993"; c0 "after making move Nxe5"; pv Nxe5 f4 Nc6 e5 Nh5 f5 Ng7 Nd5 Qc8 fxg6 hxg6 Qf3 Nd8 Nf6+ Ke7 Nd5+ Ke8 Nf6+ Ke7;
r1bq1rk1/3nbppp/pp1p1n2/2pPp3/P1P1P3/2N3P1/1P2QPBP/R1B1K1NR w KQ - acd 25; ce 36; bm Nf3; id "Pos.21 Kortchnoi-Plachetka, Luhacovice 1969"; c0 "original position"; pv Nf3 Ne8 O-O Nc7 Rd1 a5 Bh3 Na6 b3 h6 Bb2 Re8 Re1 Nb4 Nb5 Ba6 Bc3 Nf6 Nh4 Bxb5 axb5;
r1bq1rk1/3nbppp/pp1p1n2/2pPp3/P1P1P3/2N3P1/1P2QPBP/R1BK2NR b - - acd 25; ce 14; bm b5; id "Pos.21 Kortchnoi-Plachetka, Luhacovice 1969"; c0 "after making move Kd1"; pv b5 axb5 Nb6 b3 axb5 Rxa8 Nxa8 Nxb5 Bd7 f4 exf4 gxf4 Bxb5 cxb5 Qb6 Nf3 Nc7 Bf1 Rb8 Rg1 Qa7 Bb2 Nxb5 Kc1 g6 Qd3 Nc7 Qe3 Qa2 Bc4 Nb5 Qd3 Qa5 Ng5;
2kr3r/ppp1qpp1/2p5/2b2b2/2P1pPP1/1P2P1p1/PBQPB3/RN2K1R1 b Q - acd 22; ce 1228; bm Bxe3; id "Pos.23 Larsen-Spassky, Beograd 1970"; c0 "original position"; pv Bxe3 Nc3 Bf2+ Kd1 Bxg1 Qc1 Be3 Nd5 Rh1+ Kc2 Rxc1+ Rxc1 cxd5 dxe3 Bd7 Bxg7 dxc4 Bd4 cxb3+ axb3 Qh4 Bf1 Qxg4 Kb2 g2 Bxg2 Qxg2+ Rc2 Qg6 Ka3 b6 Be5 Bc6 Bd4 Kb7 Kb2 Bd7 Be5 c5;
2kr4/ppp1qpp1/2p5/2b2b2/2P1pPP1/1P2P1p1/PBQPB3/RN2K1Rr w Q - acd 28; ce -746; bm Rxh1; id "Pos.23 Larsen-Spassky, Beograd 1970"; c0 "after making move Rh1"; pv Rxh1 g2 Rg1 Qh4+ Kd1 Qh1 Qc1 Qxg1+ Kc2 Qxc1+ Bxc1 Be6 f5 g1=Q Nc3 Bd7 Bb2 Qg2 Rf1 Bb4 Kd1 Kb8 Nb1 Rh8 Bxg7 Rh2 Re1 Rh1 Rxh1 Qxh1+ Kc2 Qg2 Bc3 Qxe2 Bxb4 Qxg4 f6 Qe2 Be7 b5 cxb5 cxb5 Nc3 Qd3+ Kd1 Kb7 Bb4 Bg4+ Kc1 Bf3 a4;
r3kb1r/1p2pppp/1pn5/3p1b2/3P4/4PN2/PP1B1PPP/R3KB1R b KQkq - acd 26; ce -14; bm e6; id "Pos.25 Janowsky-Capablanca, New York 1916"; c0 "original position"; pv e6 a3 Be7 Rc1 O-O Bb5 Rfc8 O-O g5 h3 h5 Be2 Bg6 Bc3 Kg7 Nd2 Bd6 e4 Bf4 exd5 exd5 Rfe1 Re8 Bf3 Rxe1+ Rxe1 Rd8 Bd1;
r3kb1r/1p1bpppp/1pn5/3p4/3P4/4PN2/PP1B1PPP/R3KB1R w KQkq - acd 27; ce 16; bm Be2; id "Pos.25 Janowsky-Capablanca, New York 1916"; c0 "after making move Bd7"; pv Be2 e6 O-O Bd6 a3 f6 Rac1 Kf7 Bb5 Rad8 h4 Ne7 Bd3 Rc8 g3 h5 Kg2 Nf5 Rh1 Bc6 Ng1 Rc7 Bxf5 exf5;
rn1r2k1/pq1p1ppp/3Rp3/2p5/2P1b3/4QNP1/P3PPBP/3R2K1 w - - acd 24; ce 67; bm Qxc5; id "Pos.27 H. Olafsson-Levitt, Reykjavik 1990"; c0 "original position"; pv Qxc5 Nc6 Qe3 Bc2 R1d2 Qb1+ Bf1 Bf5 Qb3 Rdb8 Qxb1 Rxb1 Rxd7 Kf8 Rd1 Rxd1 Rxd1 Ke7 Rd2 f6 Rb2 Rb8 Rxb8 Nxb8 Nd2 Kd6 e4 Bg6 f3 Nc6 Kf2 Be8 Ke3;
rn1r2k1/pq1p1ppp/4R3/2p5/2P1b3/4QNP1/P3PPBP/3R2K1 b - - acd 27; ce -61; bm fxe6; id "Pos.27 H. Olafsson-Levitt, Reykjavik 1990"; c0 "after making move Rxe6"; pv fxe6 Ng5 h6 Nxe4 Nc6 Nxc5 Qb6 Nxd7 Qxe3 fxe3 Rac8 Bxc6 Rxc6 Nf6+ Kf7 Rxd8 Kxf6 Rd7 Ra6 Rd2 Ra3 Kf2 Rc3 Rd7 a5 Ra7 Ra3 c5 Rxa2 e4 Ke5 Ke3 g5 c6 Kd6 c7 Rc2 e5+ Kd7 Rxa5 Rxc7 Ra6 Rb7 Kd4 g4 Ke3 Ke7 Rc6 Ra7 Ke4 Ra4+ Kd3 Ra3+ Ke4;
8/8/p2k1p2/1p1p3p/1P1P3p/P3NPP1/5K2/1b6 w - - acd 36; ce 48; bm gxh4; id "Pos.28 Karpov-Kasparov, Moscow 1984"; c0 "original position"; pv gxh4 Bg6 Ng2 Bf7 Nf4 Kc7 Nd3 Be6 Ke3 Kb6 Kf4 Kc6 Nc5 Bc8 Nb3 Be6 Nc1 Kd6 Ne2 Ke7 Ke3 Bf7 Nf4 Kd6 Ke2 Be8 Nd3 Bd7 Kf2 Kc6 Ke3 Kd6 Kf4 Bc8 Kg3 Be6 Nc5 Bc8 Kf2 Kc7 Kg3 Kb6 Nd3 Be6 Kf4;
8/8/p2k1p2/1p1p3p/1P1P3p/P4PP1/5KN1/1b6 b - - acd 33; ce -20; bm hxg3+; id "Pos.28 Karpov-Kasparov, Moscow 1984"; c0 "after making move Ng2"; pv hxg3+ Kxg3 Bg6 Nf4 Be8 Kh4 Bf7 Nd3 Be8 Nc5 Ke7 Nxa6 Kd6 Nc5 Bg6 Nb3 Bc2 Nc1 Bd1 Kxh5 Bxf3+ Kh4 Be4 Kg3 Ke7 Kf4 Ke6 Nb3 Ke7 Nc5 Bc2 Ke3 Kd6 Kf3 f5 Kg3 Bd1 Kf2 Bg4;
3rrk2/2p1n1bQ/1p3pp1/1q2B1N1/p1b1PP2/6PB/P1P5/3R1RK1 w - - acd 24; ce *; bm Be6; id "Pos.29 Polugayevsky-Maslov, Moscow 1963"; c0 "original position"; pv Be6 Qc5+ Kh1 Rxd1 Rxd1 Rc8 Bxc8 Nxc8 Rd8+ Ke7 Rxc8 Kd7 Rxc7+ Qxc7 Qxg7+ Ke8 Qxc7 fxe5 Qxc4 Kd7 fxe5 a3 Ne6 g5 Qb5+ Ke7 g4 Kf7 Qd7+ Kg8 Qg7#;
3rrk2/2p1n1bQ/1p3pp1/1q1RB1N1/p1b1PP2/6PB/P1P5/5RK1 b - - acd 23; ce -85; bm Nxd5; id "Pos.29 Polugayevsky-Maslov, Moscow 1963"; c0 "after making move Rd5"; pv Nxd5 Qxg6 Re7 exd5 Qc5+ Rf2 fxg5 Bxg7+ Rxg7 Qf6+ Ke8 fxg5 Qxf2+ Qxf2 Rxd5 g6 Rd6 Qe3+ Re7 Qc3 Bg8 Bf5 Kf8 a3 b5 Bd3 c6 Qh8 Re1+ Kf2 Ree6 Qh6+ Ke8 g4 Re7 Qf4 Rdd7 Kg3 Bd5 c4 Bg8;
4r1k1/1p4p1/pPp2r1p/P1Pp1p2/3P1Pn1/2NR1P2/3Q2Bq/R4K2 b - - acd 28; ce -213; bm Kh8; id "Pos.32 Kramnik-Shirov, Linares 1994"; c0 "original position"; pv Kh8 Rb1 h5 Re1 Rxe1+ Qxe1 Nh6 Ne2 Kh7 Qf2 h4 Qg1 Qxg1+ Kxg1 Re6 Kf2 Nf7 Rd1 Rh6 Re1 Re6 Rh1 Rh6 Ng1 Kg6 Nh3 Kf6 Re1 Rh8 Bf1 Rb8 Bd3 g6 Kg2 Rf8 Bb1 Rh8 Re3 Rd8 Re2;
6k1/1p4p1/pPp2r1p/P1Pp1p2/3PrPn1/2NR1P2/3Q2Bq/R4K2 w - - acd 24; ce 466; bm Nxd5; id "Pos.32 Kramnik-Shirov, Linares 1994"; c0 "after making move Re4"; pv Nxd5 cxd5 c6 Ne3+ Rxe3 Rxe3 Qxe3 Rxc6 Rc1 Rg6 Rc2 Kh7 Qe5 Rf6 Qxd5 Qxf4 Bh3 Rf8 Rc8 Rf6 Rc7 h5 Rc5 Kh6 Qxb7 Qe3 Bxf5 Rxf5 Rxf5 Qd3+ Kf2 Qc2+ Ke3 Qxf5 Qc6+ g6 b7 Qb1 Qxa6 Qg1+ Ke4 Qb1+ Kd5 Qf5+ Kc6 Qe6+ Kb5 Qd5+ Kb4 Qxd4+ Qc4 Qb2+ Qb3 Qd4+ Kb5 Qe5+ Kc6 Qe8;
2k5/q1p5/3p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 b - - acd 33; ce -129; bm Be1; id "Pos.38 Petrosyan-Hasaj, Schilde 1970"; c0 "original position"; pv Be1 Kb3 Bg3 Qe2 Bh2 Qf1 Bg3 Nb2 Kd7 Qe2 Kc8 Ka4 Kb7 Qd2 Kb6 Nd3 Qa8 Nc1 Qa7 Nb3 Kb7 Qxa5 Qb6 Nc1 Bf2 Ne2 Bd4 Qxb6+ cxb6 Nc1 Kc7 Kb3 Be3 Ne2 Bd4 Nc1;
2k5/2p5/1q1p4/pPpPp1pp/N1P1Pp2/P4PbP/KQ4P1/8 w - - acd 38; ce 765; bm Nxb6+; id "Pos.38 Petrosyan-Hasaj, Schilde 1970"; c0 "after making move Qb6"; pv Nxb6+ cxb6 h4 gxh4 Qa1 h3 gxh3 h4 Kb3 Kc7 Qb2 Kd7 Qd2 Kc7 Kc3 Kd8 Qc2 Kd7 Qe2 Ke7 Qg2 Be1+ Kd3 Bg3 Qb2 Kd7 Qc2 Kc7 Qg2 Kb7 Qf1 Kc7 Qc1 Kd7 Qb2 Kc7 Qd2 Kd7 Qe2 Ke7 Kc3 Kd7 Qg2 Kc7 Qb2 Kb7 Kb3 Kb8 Qc2 Kc7 Kc3 Kd7;
r1bqr1k1/pppnbpp1/7p/2P5/3PN3/3Q1N2/PPB1p1PP/R4RK1 w - - acd 24; ce 80; bm Qxe2; id "Pos.39 Spassky-Bronstein, Leningrad 1960"; c0 "original position"; pv Qxe2 Nf8 Rad1 c6 Ne5 f6 Bb3+ Be6 Bxe6+ Nxe6 Qg4 Nf8 Nc4 Qd7 Qxd7 Nxd7 b4 Nf8 d5 cxd5 Rxd5 Rab8 Rdd1 Ng6 Kf2 f5 Ned6 Bxd6 Nxd6 Re5 Rfe1 f4 Rxe5 Nxe5;
r1bqr1k1/pppnbpp1/3N3p/2P5/3P4/3Q1N2/PPB1p1PP/R4RK1 b - - acd 24; ce 0; bm exf1=Q+; id "Pos.39 Spassky-Bronstein, Leningrad 1960"; c0 "after making move Nd6"; pv exf1=Q+ Rxf1 Bxd6 Qh7+ Kf8 cxd6 cxd6 Qh8+ Ke7 Re1+ Ne5 Qxg7 Be6 dxe5 dxe5 Nxe5 Qd4+ Kh1 Qd2 Nf3 Qf4 Bb3 Kd6 Rd1+ Ke7 Re1;
1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - - acd 42; ce 246; bm Ra7; id "Pos.4 Brzozka-Bronstein, Miskolc 1963"; c0 "original position"; pv Ra7 Bc2 Ke6 Bd1 Rab7 Rd2 Rd8 Rd5 Ra8 Be2 Rd7 Rd1 Raa7 Bf1 Rdb7 Be2 Rb8 Rd2 Rd7 Rd1 Rbb7 Rd5 Ra7 Rd1 Rdb7 Bf1 Rb8 Be2 Rd7 Kc2 Rbb7 Kd2 d5 cxd5+ Rxd5+ Kc2 Rxd1 Kxd1 Rd7+ Kc2 Kf7 Kc3 Kf6 Bc4 Rd1 Bb5 Ra1;
8/4k3/r2p2p1/2pR1p1p/2P1pP1P/prK1P1P1/P7/1B6 w - - acd 35; ce -75; bm Kxb3; id "Pos.4 Brzozka-Bronstein, Miskolc 1963"; c0 "after making move Rxb3+"; pv Kxb3 Rb6+ Kc2 Rb2+ Kc1 Rg2 Rd1 Rxg3 Re1 Rh3 Kc2 Rxh4 Kb3 Rh2 Kxa3 h4 Kb3 h3 a4 Rg2 Kc3 h2 Rh1 Kd8 a5 Kc7 Bc2 Kb7 Ba4 Ka6 Be8 Kxa5 Ra1+ Kb6 Rh1 Ka6 Bb5+ Kb7 Be8 Kb8 Bxg6 Rxg6 Rxh2 Rg3 Kd2 Kc7 Rh7+ Kb6 Rh1;
r1bqkb1r/ppp2pp1/5n1p/n2P4/2B1p3/3P1N2/PPP2PPP/RNBQK2R w KQkq - acd 24; ce 2; bm Qe2; id "Pos.42 Bronstein-Rojahn, Moscow ol 1956"; c0 "original position"; pv Qe2 Nxc4 dxc4 Bc5 Nfd2 O-O O-O Bg4 Qe1 Re8 Nb3 Bd6 Nc3 Qe7 h3 Bh5 Nb5 Be5 N5d4 Bg6 Be3 a6 Qd2 Qd6 Na5 Rab8 Rae1 Bh2+ Kh1;
r1bqkb1r/ppp2pp1/5n1p/n2P4/2B1P3/5N2/PPP2PPP/RNBQK2R b KQkq - acd 26; ce 94; bm Nxc4; id "Pos.42 Bronstein-Rojahn, Moscow ol 1956"; c0 "after making move dxe4"; pv Nxc4 Qd4 Nb6 Nc3 Be7 a4 a5 Nb5 c6 dxc6 bxc6 Qxd8+ Bxd8 Nd6+ Ke7 Bf4 Nh5 Be5 f6 Nxc8+ Nxc8 Bc3 Kf7 Nd4 Ne7 O-O Bb6 Ne2 Bc7 Rad1 Rhd8;
3qk2r/2pnbpp1/rpn1p2p/p2pP3/P2P1B1P/1NP2N2/1P3PP1/R2QK2R b KQk - acd 27; ce -30; bm Qb8; id "Pos.43 Zeitlin-Monin, USSR 1978"; c0 "original position"; pv Qb8 Qe2 Ra8 Nfd2 Qb7 Nc1 Qa6 Qg4 g6 Qf3 Bf8 Ne2 Bg7 O-O Ne7 Ng3 O-O Qe3 Kh7 Rfc1 Rad8 Re1;
q3k2r/2pnbpp1/rpn1p2p/p2pP3/P2P1B1P/1NP2N2/1P3PP1/R2QK2R w KQk - acd 27; ce 35; bm Nfd2; id "Pos.43 Zeitlin-Monin, USSR 1978"; c0 "after making move Qa8"; pv Nfd2 Qb7 Qg4 Bf8 O-O Ne7 h5 Nf5 Qe2 c5 Qb5 cxd4 Nxd4 Nxd4 cxd4 Bb4 Rfc1 O-O Nb3 Ra7 Rc6 Rc8 Rac1 Rxc6 Qxc6 Be7 Nd2 Qxc6 Rxc6 Kh7 Rc8;
4r3/2q2pk1/2pp2pp/1b1P4/1P2N3/rB1n3P/3Q1PP1/2R1R1K1 w - - acd 25; ce 115; bm Rxc6; id "Pos.44 Timman-Kasparov, Hilversum 1985"; c0 "original position"; pv Rxc6 Qb8 Qc3+ Re5 Re3 Bxc6 dxc6 Qxb4 Qxb4 Nxb4 c7 Ra8 Nxd6 Rc5 Re7 Na6 c8=Q Raxc8 Nxc8 Rxc8 Rxf7+ Kh8 Re7 Rc1+ Kh2 Rc7 Rxc7 Nxc7 Kg3 Kg7 Kf3 Kf6 Ke3 Kf5 f4 g5 g4+ Kf6 Bc4 Na8 fxg5+ hxg5 Ke4 Nc7 Bd5 Nb5;
4r3/2q2pk1/2pp1Npp/1b1P4/1P6/rB1n3P/3Q1PP1/2R1R1K1 b - - acd 26; ce 0; bm Rxe1+; id "Pos.44 Timman-Kasparov, Hilversum 1985"; c0 "after making move Nf6"; pv Rxe1+ Rxe1 Kxf6 Qc3+ Ne5 f4 Kg7 fxe5 dxe5 Qb2 Qa7+ Kh2 f6 d6 Ra6 Rxe5 fxe5 Qxe5+ Kh7 Qe8 Qg7 d7 Ra8 Qxa8 Qe5+ Kg1 Qe1+ Kh2 Qe5+;
2rr3k/4Rp2/2qppn1p/1p6/4P3/2P3RP/1Pp2PP1/3Q2K1 w - - acd 31; ce -93; bm Qd2; id "Pos.47 Robovic-Van Wely, Munich 1992"; c0 "original position"; pv Qd2 Ng8 Rxf7 Rf8 Rxf8 Rxf8 Qxc2 Qc5 Qe2 Qe5 b4 h5 Qa2 Rf7 Rg6 Rf6 Rg3 Qxe4 Qa7 Rg6 Rxg6 Qxg6 Qd7 Qb1+ Kh2 Qf5 Qxd6 Nf6 f3 Nd5 Kg1 Qb1+ Kh2 Qe1 Qb8+ Kg7 Qxb5 Qe5+ Kh1 Qxc3 Qd7+ Kf6;
2rr3k/4Rp2/2qppn1p/1p6/4P3/2P2QRP/1Pp2PP1/6K1 b - - acd 26; ce 1045; bm c1=Q+; id "Pos.47 Robovic-Van Wely, Munich 1992"; c0 "after making move Qf3"; pv c1=Q+ Kh2 Nh5 Qxh5 Qf4 Rxf7 Qe8 Rxf4 Qxh5 Rgf3 Ra8 g3 Ra2 b3 Qe5 c4 bxc4 bxc4 Rc8 Rb3 Rb2 Ra3 Qd4 Raf3 h5 h4 Kg7 Rf7+;
1r1qr1k1/3nppb1/b2p2p1/2pn4/8/2N1BNPB/PPQ1PP2/R3K2R w KQ - acd 24; ce 367; bm Be6; id "Pos.48 Malinin-Savinov, Leningrad 1988"; c0 "original position"; pv Be6 fxe6 Bh6 Nf4 gxf4 Nf8 Bxg7 Kxg7 O-O-O Qb6 Ng5 Qb4 Rh4 e5 Rg1 Bc8 Nd5 Qb7 Rd1 Ra8 a3 Rb8 fxe5 Qb3 Qxb3 Rxb3 Nc7 Rd8 exd6 exd6 Rxd6 Rxd6 Ne8+ Kg8 Nxd6 Bf5 Nxf5 gxf5;
1r1qr1k1/3nppb1/b2p2Q1/2pn4/8/2N1BNPB/PP2PP2/R3K2R b KQ - acd 23; ce 617; bm fxg6; id "Pos.48 Malinin-Savinov, Leningrad 1988"; c0 "after making move Qxg6"; pv fxg6 Be6+ Kf8 Nxd5 Rxb2 Ng5 Qa5+ Kf1 Rd8 Rh4 Bxe2+ Kg1 Bb5 Bh3 Nf6 Ne6+ Kf7 Ng5+ Ke8 Nc7+ Qxc7 Ne6 Qa5 Nxg7+ Kf8 Ne6+ Kf7 Nxd8+ Qxd8 a4 Qa5 Rc1 Bc6 Bf1 Rb4 Rxb4 Qxb4 Rc4 Qa5 Rf4 Bxa4 Bc4+ Kg7 Rh4 Qe1+ Kh2;
2r1nr2/pb1p1kpQ/4qp1B/1p6/3P3R/P5N1/6PP/R5K1 b - - acd 23; ce 73; bm Qd5; id "Pos.49 Geller-Euwe, Zurich 1953"; c0 "original position"; pv Qd5 Re4 Rc6 Rae1 Re6 R4e2 Qxd4+ Be3 Qc4 Rf1 d6 Rc1 Be4 Qh5+ Bg6 Qf3 Qb3 Bxa7 Qxf3 gxf3 Rh8 Rxe6 Kxe6 Ne2 Kd7 Bb6 Bd3 Nf4 Bc4 a4 Rh4 Ng6 Rh6 Nf4 g5 axb5 Bxb5;
2r1n2r/pb1p1kpQ/4qp1B/1p6/3P3R/P5N1/6PP/R5K1 w - - acd 24; ce -8; bm Qxh8; id "Pos.49 Geller-Euwe, Zurich 1953"; c0 "after making move Rh8"; pv Qxh8 Rc2 d5 Bxd5 Rd1 Rxg2+ Kf1 Ra2 Bd2 Bc4+ Rxc4 Qxc4+ Ke1 Qe6+ Kf1 Qg4 Qh5+ Qxh5 Nxh5 d6 Bb4 Rxh2 Ng3 a6 Rd3 Rh4 Kg2 g6 Ne2 f5 Bxd6 Nxd6 Rxd6 Ra4 Rd7+ Kf6 Rd3 g5 Nc3 Rg4+ Kf2 Rf4+ Kg2 Rc4 Kg3 f4+ Kf3;
2k2b1r/pb1r1p2/5P2/1qnp4/Npp3Q1/4B1P1/1P3PBP/R4RK1 w - - acd 25; ce 121; bm Bxc5; id "Pos.5 Ivanchuk-Shirov, WijkaanZee 1996"; c0 "original position"; pv Bxc5 Bxc5 Qg7 Rhd8 Nxc5 Qxc5 Bh3 Kc7 Bxd7 Rxd7 Qg5 Kc6 Rfe1 Qd4 Re2 Rd6 Qh5 Qxf6 Rxa7 Rd7 Ra4 Kc5 Ra1 Rc7 Qg4;
2k2b1r/pb1r1pQ1/5P2/1qnp4/Npp5/4B1P1/1P3PBP/R4RK1 b - - acd 26; ce 0; bm Bxg7; id "Pos.5 Ivanchuk-Shirov, WijkaanZee 1996"; c0 "after making move Qg7"; pv Bxg7 fxg7 Rg8 Nxc5 Rc7 Nxb7 Rxb7 Rfd1 Rd7 Bxa7 Rxg7 Bd4 Rg4 f4 Kb8 Bh3 f5 Bxg4 fxg4 Re1 Rb7 f5 c3 bxc3 b3 f6 b2 Rab1 Qd3 f7 Rxf7 Rxb2+ Kc8 Reb1 Rc7 Rb6 Kd7 Re1 Qd2 Rbe6 Rc8 R1e2 Qd3 Re7+ Kc6 R7e6+ Kd7;
3qnr2/5p1k/1rp1pPpp/pbNp4/3P1QP1/1P2RN2/P1P2P1P/6RK w - - acd 24; ce 594; bm g5; id "Pos.52 Stanishevsky-Nikonov, Moscow 1981"; c0 "original position"; pv g5 Kg8 gxh6 Qxf6 Qxf6 Nxf6 Ne5 Rbb8 a4 Ne4 Nxe4 dxe4 axb5 Rxb5 c4 Rb7 Nxc6 Rc8 Nxa5 Rb4 Rxe4 Kh7 Rf4 Rc7 Rh4;
3qnr2/3N1p1k/1rp1pPpp/pb1p4/3P1QP1/1P2RN2/P1P2P1P/6RK b - - acd 26; ce -338; bm Qxd7; id "Pos.52 Stanishevsky-Nikonov, Moscow 1981"; c0 "after making move Nd7"; pv Qxd7 Ne5 g5 Rh3 gxf4 Nxd7 Nxf6 Nxf6+ Kg7 g5 Rfb8 Nh5+ Kf8 g6 Ke7 Nxf4 Rg8 Rxh6 fxg6 Nxg6+ Kd6 Nf4 Rxg1+ Kxg1 Rb8 Nxe6 Rg8+ Ng5+ Kd7 Rh7+ Kd6 h4 a4 Kg2 Re8 Ra7 axb3 Nf7+ Ke6 cxb3 Be2 f3 Rf8 Ng5+ Kd6 Rf7 Re8 Rf6+ Kd7;
6k1/3bppbp/pp1pq1p1/8/1P1Bn1P1/N1r2P2/P1N1P2P/R2QR1K1 b - - acd 24; ce -371; bm Ng5; id "Pos.53 Portisch-Tal, Amsterdam 1964"; c0 "original position"; pv Ng5 Bxg7 Kxg7 Qd4+ Qe5 Red1 Qxd4+ Rxd4 b5 h4 Ne6 Rd2 f5 gxf5 gxf5 Rc1 Kf7 Kf2 Nf4 Rd4 Rc6 Rdd1 Rc3 Nb1 Nh3+ Kg3 f4+ Kh2 Rc4 Nd2;
6k1/3bppb1/pp1pq1p1/7p/1P1Bn1P1/N1r2P2/P1N1P2P/R2QR1K1 w - - acd 24; ce 591; bm Bxg7; id "Pos.53 Portisch-Tal, Amsterdam 1964"; c0 "after making move h5"; pv Bxg7 Kxg7 Qd4+ f6 Qxe4 Qxe4 fxe4 Bc6 gxh5 Bxe4 Rec1 g5 Rab1 Kh6 b5 a5 Rb2 Rc5 Nb1 Bh7 Nd2 Kxh5 Kf2 Rc3 Nf1 Bg8 e4 Kg6 Nfe3 e6 Rg1;
4rrk1/1p1bq1bp/3BN1p1/3P2NP/p3p3/P1P3Q1/1P3nP1/5RK1 b - - acd 26; ce 213; bm Nh3+; id "Pos.54 Weide-Ligterink, Leeuwarden 1979"; c0 "original position"; pv Nh3+ gxh3 Rxf1+ Kxf1 Qf6+ Qf2 Qxf2+ Kxf2 h6 Nxe4 Bxe6 dxe6 Rxe6 Kf3 gxh5 Bc5 Be5 Be3 b6 Nf2 Kf7 Nd3 b5 Nb4 Rg6 Bf2 Bd6 Nc6 Bc7 Nb4 Ke6 Ke4 Rg2 Kf3 Rh2 h4 Kf5 Nd5 Rh3+ Ke2;
4rrk1/1p1bq1bp/3BN1p1/3P2NP/p3p3/P1P3Q1/1P4P1/5RKn w - - acd 26; ce -171; bm Rxf8+; id "Pos.54 Weide-Ligterink, Leeuwarden 1979"; c0 "after making move Nh1"; pv Rxf8+ Qxf8 Nxf8 Nxg3 Nxd7 Nxh5 Ne6 Nf6 Nxg7 Kxg7 Be5 Rxe5 Nxe5 Nxd5 Nd7 b5 Nc5 Kf6 c4 bxc4 Nxe4+ Ke5 Nc5 Nb6 Kf1 Kd5 Nb7 Nd7 Kf2;
r2qk2r/1b1p1ppp/p2bpn2/n1pPN3/1pP5/6P1/1P2PPBP/RNBQ1RK1 w kq - acd 24; ce -20; bm Bf4; id "Pos.55 Shabalov-Ronin, Kiev 1983"; c0 "original position"; pv Bf4 Bc7 Nd2 O-O e4 d6 Nd3 h6 Be3 exd5 cxd5 Re8 Bf4 Bb6 Be3 Rb8 Qe2 Bc7 b3 Qd7 Rfe1 Rbd8 Nf4 Re7 Nh5 Ng4 Bh3 f5 Nf4 Nxe3 Qxe3;
r2qk2r/1b1N1ppp/p2bpn2/n1pP4/1pP5/6P1/1P2PPBP/RNBQ1RK1 b kq - acd 27; ce 27; bm Qxd7; id "Pos.55 Shabalov-Ronin, Kiev 1983"; c0 "after making move Nxd7"; pv Qxd7 Rxa5 Bc7 Ra1 exd5 Qc2 O-O Rd1 Qe6 Bg5 Ne4 cxd5 Bxd5 Rxd5 Qxd5 Be7 f5 Bxf8 Rxf8 Bxe4 Qxe4 Qxc5 Qxe2 Qxc7 f4 Qc1 fxg3 fxg3 Qf2+ Kh1 Rd8 Qc4+ Kh8 Nc3 bxc3 bxc3 a5 Qc7 Ra8 Qe5 a4 Qe4 Rf8 Qxa4 Qf3+ Kg1 Qe3+ Kg2 Qxc3 Qa7 Qd2+;
3B1rk1/2q4p/p3p1p1/1pb4n/2p1P1N1/3p2PP/PPB1QPK1/R3R3 b - - acd 25; ce -139; bm Qxd8; id "Pos.57 Voronov-Estrin, Leningrad 1971"; c0 "original position"; pv Qxd8 Qd2 Nf6 f4 Nxg4 hxg4 Qe7 Rh1 dxc2 Qxc2 Bd4 Rad1 e5 f5 Rf7 Qd2 Qb7 Qe2 Qe7 a3 Qf6 Rdf1 Qg5 a4 bxa4 Rd1 h6;
1q1B1rk1/7p/p3p1p1/1pb4n/2p1P1N1/3p2PP/PPB1QPK1/R3R3 w - - acd 24; ce 204; bm Bxd3; id "Pos.57 Voronov-Estrin, Leningrad 1971"; c0 "after making move Qb8"; pv Bxd3 Bxf2 e5 cxd3 Bf6 Nxf6 Nxf6+ Rxf6 Qxd3 Rf8 Re2 Ba7 Qd7 Qb6 Rc1 Rf7 Qc6 Qd4 Qxe6 Qd3 Qg4 Kg7 Rf1 Rxf1 Kxf1 Qb1+ Re1 Qxa2 Qd7+ Qf7+ Qxf7+ Kxf7 Rd1 Ke7 Kg2 Bb8 Ra1 Bxe5 Rxa6 Bxb2 Rb6 Bd4;
rnbq1rk1/3pppbp/3P2p1/1pp1P1B1/6n1/2N2N2/PP3PPP/R2QKB1R b KQ - acd 23; ce -53; bm Re8; id "Pos.58 Greenfeld-J. Polgar, Haifa 1989"; c0 "original position"; pv Re8 dxe7 Qa5 Bxb5 Ba6 Be2 Nxe5 O-O Bxe2 Qxe2 c4 Ne4 Ra6 Rad1 Nxf3+ Qxf3 Bxb2 a4 Be5 Rd5 Qxd5 Nf6+ Bxf6 Qxd5 Bxg5 Qxg5 Rxa4 Qb5 Ra8 Qxc4 Nc6 Rb1 Rxe7 g3 Ree8 Qd3 Ra7 Kg2 Kg7 Qd2 Ne5;
rnbq1rk1/3pppbp/3P2p1/1pp1n1B1/8/2N2N2/PP3PPP/R2QKB1R w KQ - acd 25; ce 91; bm dxe7; id "Pos.58 Greenfeld-J. Polgar, Haifa 1989"; c0 "after making move Nxe5"; pv dxe7 Re8 Bxb5 Qb6 O-O Nxf3+ Qxf3 Bb7 Qe3 Bd4 Qe2 h6 Bxh6 Qf6 Rfe1 Rxe7 Qd2 Nc6 Ne4 Rxe4 Rxe4 Ne5 Rf4 Qb6 Rxd4 cxd4 Bf1 Ba6 Bxa6 Rxa6 b3 f6 h4 Ra8 Rc1 Kf7 b4 d5 Rc5;
1rr3k1/1b2qpbp/pQpp1np1/4p2P/2P1P1P1/2N1BP2/PP6/2KR1B1R b - - acd 26; ce -25; bm d5; id "Pos.62 Timman-Kasparov, Moscow 1981"; c0 "original position"; pv d5 Bc5 Qe6 hxg6 hxg6 cxd5 cxd5 Qxe6 fxe6 Bd6 Ra8 Bxe5 dxe4 g5 Nd5 Bxg7 Kxg7 fxe4 Nxc3 Rd7+ Kg8 bxc3 Bxe4 Rh4 Rxc3+ Kd2 Rc2+ Ke3 Bd5 Rdh7 e5 Rh8+ Kf7 R4h7+ Ke6 Rxa8 Bxa8 Ra7 Bd5 Rxa6+ Ke7 Ra5 Be6 a4 Ra2 Ke4 Rf2 Ra7+ Kd6 Ra6+ Ke7 Bb5 Rg2 Rb6 Rg4+ Kxe5 Rxg5+;
1rr3k1/1b2qpbp/pQpp2p1/3np2P/2P1P1P1/2N1BP2/PP6/2KR1B1R w - - acd 23; ce 103; bm cxd5; id "Pos.62 Timman-Kasparov, Moscow 1981"; c0 "after making move Nd5"; pv cxd5 cxd5 exd5 e4 hxg6 hxg6 Qa5 exf3 Ba7 Ra8 Bf2 Rab8 Kb1 Rxc3 bxc3 Bxd5+ Ka1 Qb7 Qa3 Qc8 Rc1 Be5 g5 Qf5 Bxa6 Qxg5 Rc2 Ra8 Qb4 Qf5 Rd2 Qe4 Qa5 Be6 Rh4 Qc6;
r6r/ppN1k1pp/2n1bn2/6B1/2B5/q4p2/PPP2PPP/2KR3R w - - acd 26; ce 127; bm Bxe6; id "Pos.67 Tal-Lutikov, Tallinn 1964"; c0 "original position"; pv Bxe6 Qd6 Rxd6 Kxd6 Bf4+ Ne5 Nxa8 Kxe6 Nc7+ Kf5 Bxe5 Kxe5 Re1+ Kf4 Ne6+ Kg4 gxf3+ Kxf3 Nxg7 Rd8 Re6 Ng8 c4 Kxf2 Re4 Kf3 Rh4 Ke2 Nf5 Rd7 Rh3 Nf6 Re3+ Kf2 Re6 Ng4 h3 Nh2 Rd6 Rxd6 Nxd6;
r6r/ppN1k1pp/2n1bn2/6B1/2B5/q4p2/PPP2PPP/2KRR3 b - - acd 24; ce 0; bm Qa5; id "Pos.67 Tal-Lutikov, Tallinn 1964"; c0 "after making move Rhe1"; pv Qa5 Rxe6+ Kf8 Bf4 b5 Bd6+ Kf7 Nxb5 Rac8 gxf3 Rhe8 Nc7 Kg6 Rg1+ Kh5 Nxe8 Rxe8 Rxe8 Nxe8 Bf4 Nd8 h4 Qb4 Rg5+ Kxh4 Rg1 Kh5 Rg5+ Kh4;
r1bq1rk1/pppnbpp1/4pn1p/3p2B1/2PP4/2N1PN2/PPQ2PPP/R3KB1R w KQ - acd 25; ce 8; bm Bh4; id "Pos.74 Kasparov-Portisch, Brussels 1986"; c0 "original position"; pv Bh4 c5 Rd1 b6 dxc5 Nxc5 Bxf6 Bxf6 cxd5 Bxc3+ Qxc3 exd5 Be2 Bb7 O-O Rc8 Rc1 Qd6 Qe5 Qxe5 Nxe5 Rfe8 Nf3 g6 Nd4 a5 Rfd1 Kg7 a3 Re7 Bg4 Rcc7 Be2;
r1bq1rk1/pppnbpp1/4pn1p/3P2B1/3P4/2N1PN2/PPQ2PPP/R3KB1R b KQ - acd 24; ce 14; bm hxg5; id "Pos.74 Kasparov-Portisch, Brussels 1986"; c0 "after making move cxd5"; pv hxg5 dxe6 fxe6 Nxg5 Nb6 h4 c5 dxc5 Bxc5 h5 Qc7 O-O-O Bb4 h6 Bxc3 bxc3 Nbd5 Kb2 b5 Bd3 Rd8 h7+ Kh8 e4 Nb6 Bxb5 Rf8;
5q2/3P1P2/4P3/5K2/4N3/P2k4/1p1N4/8 w - - acd 21; ce 1175; bm Ke5; id "Pos.77 Janowsky-Ed. Lasker, New York 1924"; c0 "original position"; pv Ke5 Kc2 a4 Qb8+ Kf5 Qd8 a5 Kd3 Ke5 Qf8 a6 Qh8+ Kd6 Qd8 a7 b1=R Nxb1 Kxe4 a8=Q+ Qxa8 Ke7 Qa7 f8=Q Qc5+ Ke8 Qc6 Nd2+ Ke5 e7 Qa4 Nc4+ Ke4 Qf6;
5q2/3P1P2/4P3/5K2/P3N3/3k4/1p1N4/8 b - - acd 20; ce *; bm Kd4; id "Pos.77 Janowsky-Ed. Lasker, New York 1924"; c0 "after making move a4"; pv Kd4 Ng5 Kd3 Nb1 Qa8 Kf6 Kc2 Kg7 Qd5 f8=Q Qxg5+ Kh7 Qh4+ Kg6 Qg4+ Kf7 Kxb1 d8=Q Qh5+ Ke7 Qh4+ Ke8 Qxa4+ Kf7 Qf4+ Qf6 Qc7+ e7 Ka2 Qa6+ Kb3 Qd3+ Ka2;
r6k/pQ3pb1/2NBr2p/5N2/2PP1pn1/4p3/P3P1Bq/R2R1K2 b - - acd 21; ce 0; bm Rg8; id "Pos.78 Ivanchuk-Yusupov, Brussels 1991"; c0 "original position"; pv Rg8 Nce7 Rxe7 Nxe7 Qh4 Kg1 Qf2+ Kh1 Qh4+ Kg1;
r6k/pQ3pb1/2NB2rp/5N2/2PP1pn1/4p3/P3P1Bq/R2R1K2 w - - acd 23; ce -150; bm Qxa8+; id "Pos.78 Ivanchuk-Yusupov, Brussels 1991"; c0 "after making move Rg6"; pv Qxa8+ Kh7 Qg8+ Kxg8 Nfe7+ Kh7 Nxg6 Qg3 Kg1 fxg6 Ne5 Bxe5 Bxe5 Qf2+ Kh1 Qxe2 Rab1 f3 Bf1 Qxa2 Rb7+ Kg8 Rb8+ Kf7 Rb7+ Ke6 Bh3 h5 Rg1 Qxc4 Bxg4+ hxg4;
r1b2r1k/4qp1p/p2ppb1Q/4nP2/1p1NP3/2N5/PPP4P/2KR1BR1 w - - acd 23; ce -11; bm Kb1; id "Pos.8 Kholmov-Bronstein, Kiev 1964"; c0 "original position"; pv Kb1 bxc3 Rd3 Bg5 Rxg5 f6 Rgg3 Nxd3 Bxd3 Rg8 Rxg8+ Kxg8 Bc4 Qg7 Qxg7+ Kxg7 fxe6 Rb8 Nf5+ Kf8 b3 Rb6 a4 a5 Bd5 Ke8 Ka2 Kd8 Nd4 Ke7 Nc6+ Rxc6 Bxc6 Bxe6 Kb1 f5 exf5 Bxf5 Bd5 Be6 Be4;
r1b2r1k/4qp1p/p1Nppb1Q/4nP2/1p2P3/2N5/PPP4P/2KR1BR1 b - - acd 26; ce -46; bm Nxc6; id "Pos.8 Kholmov-Bronstein, Kiev 1964"; c0 "after making move Nc6"; pv Nxc6 e5 Bxe5 f6 Bxf6 Bd3 Bg5+ Rxg5 f6 Rg3 Rf7 Rdg1 Qf8 Rg8+ Qxg8 Rxg8+ Kxg8 Ne4 f5 Nxd6 Rg7 Qf6 Bd7 Bc4 Rf8 Bxe6+ Bxe6 Qxe6+ Kh8 Nxf5 Rg1+ Kd2 Rf1 Qxc6 R1xf5 Qxa6 Rf2+ Ke1 Rxc2 Qb5 Rcf2 Qe5+ R2f6 h4 Kg8 Qe3 Rf4 Ke2 R8f6 h5 R6f5 Qg1+ Kf7 Qa7+ Ke6;
r2qk2r/ppp2p2/3p1n1p/5bp1/1bPQ3P/2N3B1/PP2PPP1/2R1KB1R b Kkq h3 acd 25; ce -13; bm Bc5; id "Pos.82 Keres-Richter, Munich 1942"; c0 "original position"; pv Bc5 Qd1 Ne4 Nxe4 Bxe4 Qd2 Qf6 b4 Bd4 hxg5 hxg5 Rxh8+ Qxh8 f3 Bg6 c5 dxc5 e3 Bf6 Rxc5 Rd8 Rd5 Rxd5 Qxd5 c6 Qd6 Bd8 Be5 Qh4+ g3 Qh2 Qd2 Qxd2+ Kxd2 a5 b5 cxb5 Bxb5+ Ke7 Bd4 Bc7 g4 f6 a4;
r2q3r/pppk1p2/3p1n1p/5bp1/1bPQ3P/2N3B1/PP2PPP1/2R1KB1R w K - acd 26; ce 66; bm a3; id "Pos.82 Keres-Richter, Munich 1942"; c0 "after making move Kd7"; pv a3 Bxc3+ Rxc3 Ne4 Rf3 Nxg3 Rxg3 Re8 hxg5 hxg5 Rh5 Re4 Qg7 Bg6 Rhxg5 Qe7 e3 Rh4 c5 Rh1 Qd4 Qe4 Qxe4 Bxe4 Ke2 Rah8 f3 Bg6 Kf2 R1h2 R3g4 c6;
6k1/4pp1p/3p2p1/2pPP2n/1qN2P1P/1P1Q1KPr/8/6R1 b - - acd 24; ce 76; bm Rh2; id "Pos.84 Pachman-Timman, Geneve 1978"; c0 "original position"; pv Rh2 exd6 exd6 f5 Kf8 Ne3 Rb2 Qa6 Qb8 Ra1 Rxb3 Qa8 Nf6 Qxb8+ Rxb8 g4 Rb3 Ra8+ Ke7 Ra7+ Nd7 fxg6 fxg6 Ke4 Rb4+ Kd3 Rd4+ Kc3 Rf4 h5 Rf3;
6k1/4pp1p/3p2p1/2pPP2n/2N2P1P/1P1Q1KPr/8/4q1R1 w - - acd 29; ce -27; bm Qxg6+; id "Pos.84 Pachman-Timman, Geneve 1978"; c0 "after making move Qe1"; pv Qxg6+ hxg6 Rxe1 Rxg3+ Kf2 Rxb3 exd6 exd6 Nxd6 Nxf4 Re8+ Kg7 Re7 Nxd5 Rxf7+ Kh6 Rd7 Nf6 Rc7 Kh5 Rxc5+ Kxh4 Rc4+ Kh5 Rf4 Ng4+ Ke2 g5 Rf8 Rb2+ Kd3 Ne5+ Ke3 Kg4 Rc8 Rb1 Ne4 Rb3+ Kd4 Nf3+ Kd5 Rb5+ Rc5 Rb4 Nf6+ Kf4;
4rrk1/1bpR1p2/1pq1pQp1/p3P2p/P1PR3P/5N2/2P2PP1/6K1 w - h6 acd 28; ce 131; bm Qf4; id "Pos.86 Short-Timman, Tilburg 1991"; c0 "original position"; pv Qf4 Kg7 Rd2 Qe4 Qf6+ Kg8 Rxc7 Rc8 Re7 Bc6 Rd6 Qg4 Rd4 Qf5 Ng5 Qxf6 exf6 Rce8 Rd6 Bxa4 Rb7 Rb8 Rdxb6 Rxb7 Rxb7 Bxc2 c5 a4 c6 e5 f3 Bd3 Kf2;
4rrk1/1bpR1p2/1pq1pQp1/p3P2p/P1PR3P/5N2/2P2PPK/8 b - - acd 22; ce -329; bm Bc8; id "Pos.86 Short-Timman, Tilburg 1991"; c0 "after making move Kh2"; pv Bc8 Ng5 Bxd7 Rf4 Qc5 Nxf7 Rxf7 Qxf7+ Kh8 Qxg6 Qxe5 g3 Qg7 Qxh5+ Qh7 Qxh7+ Kxh7 Rf7+ Kg8 Rxd7 c5 Kg2 e5 Rd6 e4 Rxb6 Rd8 Rc6 Rd2 Rxc5 e3 Kf3 e2 Re5 Rxc2 Rxe2 Rc3+ Kf4 Rxc4+ Re4 Rc6 h5 Kg7 Re7+ Kh6 g4 Rf6+ Ke3;
r3kb1r/4Pp2/pn3P2/1pp3B1/2p5/2N3P1/PP3P1P/3RKB1b w kq - acd 28; ce 8; bm exf8=Q+; id "Pos.89 Polugayevsky-Torre, Moscow 1981"; c0 "original position"; pv exf8=Q+ Kxf8 Rd6 Re8+ Be3 Nc8 Rxa6 Rxh2 Nxb5 Bb7 Ra5 Rh1 Ke2 Re6 Nc3 Nd6 Rxc5 Rxf6 Bd4 Re6+ Be3 Rf6;
r3kb1r/4Pp2/pn3P2/1pp3B1/2p4P/2N3P1/PP3P2/3RKB1b b kq - acd 26; ce 31; bm Bh6; id "Pos.89 Polugayevsky-Torre, Moscow 1981"; c0 "after making move h4"; pv Bh6 f4 b4 Rd6 Rb8 Nd1 Bd5 Ne3 Bxg5 fxg5 Be6 Bg2 c3 bxc3 Nd7 Bd5 bxc3 Bxe6 Rb1+ Ke2 Rb2+ Kd1 fxe6 Rxa6 Rg8 a4 Rd2+;
r1b2k2/pppq1pbp/2n3p1/2nNp3/2P5/5N2/PPQ1BPPP/3R1RK1 b - - acd 27; ce -30; bm Nd4; id "Pos.90 Karpov-Kasparov, New York 1990"; c0 "original position"; pv Nd4 Nxd4 exd4 b4 Ne6 f4 f5 g4 Qf7 gxf5 gxf5 Qa4 Kg8 Rd3 Bd7 Qa5 Bc6 Qa3 Kh8 Rh3 Rg8 Rg3 a6 Qd3 a5 a3;
r1b2k2/pppq1pbp/2n1n1p1/3Np3/2P5/5N2/PPQ1BPPP/3R1RK1 w - - acd 26; ce 104; bm Nb6; id "Pos.90 Karpov-Kasparov, New York 1990"; c0 "after making move Ne6"; pv Nb6 axb6 Rxd7 Bxd7 a3 e4 Qxe4 Bxb2 Rd1 Be8 Qb1 Bf6 Qc1 Kg8 Bf1 Be7 Rd3 Nc5 Re3 Bd7 Qa1 Bf5 h3 Bf8 g4 Bg7 Qc1 Be6;
r3kb1r/ppqnpppb/2p2n1p/8/2BP1N1P/6N1/PPP2PP1/R1BQR1K1 b kq - acd 25; ce -32; bm Nb6; id "Pos.91 Porreca-Bronstein, Belgrade 1954"; c0 "original position"; pv Nb6 Bd3 O-O-O a4 Rxd4 Bf5+ Rd7 Bxd7+ Nbxd7 a5 e5 Nfh5 Nd5 a6 b5 Nf1 f5 b3 Kb8 c4 Nc3 Qf3 b4 Bd2 e4 Qh3 Qe5 Bf4;
r3kbbr/ppqnppp1/2p2n1p/8/2BP1N1P/6N1/PPP2PP1/R1BQR1K1 w kq - acd 23; ce 71; bm Nfh5; id "Pos.91 Porreca-Bronstein, Belgrade 1954"; c0 "after making move Bg8"; pv Nfh5 Nxh5 Nxh5 g6 Bf4 Qb6 Ng3 O-O-O Qd3 f6 Bxg8 Rxg8 Qc4 Rh8 Rad1 g5 Bc1 Kb8 Qe6 gxh4 Nf5 h3 gxh3 Qc7 Rd3 c5 d5 Ka8 Rg3 Nb6 Rd1 Nc4;
r2q3k/ppp3nb/2np2r1/6Q1/2PP1P1P/1P2Np2/PB3P2/2KR3R w - - acd 28; ce 195; bm Qxd8+; id "Pos.92 Stoltz-Steiner, Saltsjöbaden 1952"; c0 "original position"; pv Qxd8+ Nxd8 h5 Rg2 d5 Kg8 Rdg1 Nf5 Nxg2 fxg2 Rxg2+ Kf8 Rg6 Nf7 Re6 Rb8 Rhe1 a6 Kd2 b5 Bc3 bxc4 bxc4 Nh4 Rh1 Nf5 Rg1 a5 Rf6 Ke7 Re1+ Kf8 Bxa5 Rb2+ Kc3 Rxf2 Bxc7 Kg7 Rfe6 Rf3+ Kd2 Rf2+ R1e2;
r2q3k/ppp3nb/2np2r1/3P2Q1/2P2P1P/1P2Np2/PB3P2/2KR3R b - - acd 26; ce -77; bm Rxg5; id "Pos.92 Stoltz-Steiner, Saltsjöbaden 1952"; c0 "after making move d5"; pv Rxg5 hxg5 Ne7 Ng4 Qe8 Rh6 Nf5 Nf6 Nxh6 Nxe8 Rxe8 gxh6 Re2 Bxg7+ Kg8 Rd2 Re1+ Kb2 Kf7 Bd4 a6 c5 Kg8 cxd6 cxd6 Kc3 Bf5 Bb6 Rh1 Kd4 Kf7 Bc7 Ke7 Ke3 Rxh6 Bb6 Rh1 Kxf3 Rh3+ Kg2 Rd3 Rxd3 Bxd3 Kf3 Bb1 a4 Bf5;
2bq1rk1/3n1p1p/6p1/4P3/1pp1nP1P/1P6/r5P1/1NNRKBQR b K - acd 24; ce 307; bm Rb2; id "Pos.96 Karpov-Kasparov, Linares 1993"; c0 "original position"; pv Rb2 Bxc4 Rxb1 Qe3 Nc3 Rd6 Qc7 O-O Nc5 Nd3 Rxf1+ Kxf1 Nxd3 Bxd3 Be6 f5 Ra8 Kg1 Bxf5 Bxf5 gxf5 Rf6 Ra1+ Kh2 Qa7 Rb6 Ne4 Qd4 Qc7 Rxb4 Ra5 h5 Kg7 Rb6 f6 Rd6 fxe5 Rd7+ Kf6 Qd1 Ra1 Rxc7 Rxd1 Rxh7;
2bq1rk1/3n1p1p/6p1/4P3/1p2nP1P/1Pp5/r5P1/1NNRKBQR w K - acd 22; ce -327; bm Nxa2; id "Pos.96 Karpov-Kasparov, Linares 1993"; c0 "after making move c3"; pv Nxa2 c2 Qd4 cxd1=R+ Qxd1 Ng3 Rh3 Nxf1 Nxb4 Qb6 Kxf1 Qxb4 Qd2 Qb5+ Qe2 Qxe2+ Kxe2 Nxe5 Rc3 Ba6+ Kd1 Rd8+ Nd2 Nd3 g3 Kg7 Rc7 Nb4 Kc1 Rd3 Ne4 Rxb3 Ng5 Nd3+ Kd2;
r1b2rk1/pp1ppp1p/5bp1/q7/3nP2Q/1BN1B3/PPP2PPP/R4RK1 w - - acd 27; ce 11; bm Qh6; id "Pos.99 Nezhmetdinov-Chernikov, Rostov 1962"; c0 "original position"; pv Qh6 Bg7 Qg5 Qxg5 Bxg5 e6 Rfd1 f5 Be3 Nc6 exf5 Rxf5 Rab1 Bf8 g3 Na5 Ba4 d5 Bb5 Nc6 f4 a6 Bf1 b5 a3 Bb7 Bh3 Rf6 Ne2 Rc8;
r1b2rk1/pp1ppp1p/5Qp1/q7/3nP3/1BN1B3/PPP2PPP/R4RK1 b - - acd 27; ce 54; bm Ne2+; id "Pos.99 Nezhmetdinov-Chernikov, Rostov 1962"; c0 "after making move Qxf6"; pv Ne2+ Nxe2 exf6 Nc3 Re8 Rad1 Re6 Rd5 Qd8 Rd3 Re8 Bd4 a5 Rf3 Ra6 Nd5 Ree6 Nc3 Rec6 Bd5 Rc7 Rc1 Qe7 a3 g5 Nb5 Rcc6 h3 h6;

[Dann Corbit]

P.S.
For each of the above original positions, the BM has been replaced in the record with the value from analysis (due to an automated SQL stored procedure that I use) and so the values will not agree with those in the initial set.

For some, the initial set is right, and for some the intial set is wrong.

[Marc MP]

Must I conclude that for:

Code: Select all

2kr3N/pbpq4/1p2p2b/3pPp2/2nP1n2/P1NB1QP1/1PP2B1P/R3K2R b KQ - acd 27; ce -141; bm Nxd3+; id "Pos.101 Bogdanovic-Planinc, Novi Sad 1965"; c0 "original position"; pv Nxd3+ cxd3 Rxh8 Qe2 Na5 b4 Nc6 h4 Kb8 Kd1 Rg8 h5 Rg4 Rh4 Rg8 Kc2 Qe7 Kb2 a6 Rah1 Qg5;

2kr3N/pbpq4/1p2p2b/3pPp2/3P1n2/P1NB1QP1/1PPn1B1P/R3K2R w KQ - acd 25; ce 167; bm Kxd2; id "Pos.101 Bogdanovic-Planinc, Novi Sad 1965"; c0 "after making move Nd2"; pv Kxd2 Nxd3+ Ke2 Nxf2 Kxf2 Rxh8 a4 c5 Ne2 a5 h4 Rg8 h5 Kb8 c3 Qc7 Rh4 Qc6 Nf4 Ba6 Kg2 Bc4 Ng6 Qd7 dxc5 bxc5 Qf2 Qb7 Kh2 Be3 Qc2 Bh6;

The given solution is incorrect since black could have been at -1.41 instead of -1.67?

But in this case:

Code: Select all

1nrqk2r/p3bpp1/bpn1p3/3pP2p/3P4/PP3N1P/1B2NPP1/RB1QR1K1 b k - acd 25; ce -84; bm Na5; id "Pos.104 Filguth-Kortchnoi, Sao Paulo 1979"; c0 "original position"; pv Na5 Bd3 Bxd3 Qxd3 Nbc6 Rf1 O-O Nf4 h4 Bc1 Qc7 Bd2 Nb8 Ra2 Qb7 Qb1 Rfe8 Re1 Nd7 Qd3 a6 Nh5 g6 Bxa5 bxa5 Nf4 Qb5;

1nrq3r/p2kbpp1/bpn1p3/3pP2p/3P4/PP3N1P/1B2NPP1/RB1QR1K1 w - - acd 25; ce 61; bm b4; id "Pos.104 Filguth-Kortchnoi, Sao Paulo 1979"; c0 "after making move Kd7"; pv b4 g5 Nh2 Bc4 Ng3 h4 Ngf1 a5 bxa5 Nxa5 Nd2 Ke8 Ng4 Nbc6 a4 Ba6 Qf3 Nb4 Bc3 Nbc6 Bd3 Nc4 Qe2 Nb4 Bxc4 dxc4 Bxb4 Bxb4 Nf6+ Kf8;

The solution given (...Kd7) was correct since white's advantage is lower?

What time did you let run the engine (Rybka 3?)?

Other positions not mentioned are correct?

[Dann Corbit]

Must I conclude that for:

Code: Select all

2kr3N/pbpq4/1p2p2b/3pPp2/2nP1n2/P1NB1QP1/1PP2B1P/R3K2R b KQ - acd 27; ce -141; bm Nxd3+; id "Pos.101 Bogdanovic-Planinc, Novi Sad 1965"; c0 "original position"; pv Nxd3+ cxd3 Rxh8 Qe2 Na5 b4 Nc6 h4 Kb8 Kd1 Rg8 h5 Rg4 Rh4 Rg8 Kc2 Qe7 Kb2 a6 Rah1 Qg5;

2kr3N/pbpq4/1p2p2b/3pPp2/3P1n2/P1NB1QP1/1PPn1B1P/R3K2R w KQ - acd 25; ce 167; bm Kxd2; id "Pos.101 Bogdanovic-Planinc, Novi Sad 1965"; c0 "after making move Nd2"; pv Kxd2 Nxd3+ Ke2 Nxf2 Kxf2 Rxh8 a4 c5 Ne2 a5 h4 Rg8 h5 Kb8 c3 Qc7 Rh4 Qc6 Nf4 Ba6 Kg2 Bc4 Ng6 Qd7 dxc5 bxc5 Qf2 Qb7 Kh2 Be3 Qc2 Bh6;

The given solution is incorrect since black could have been at -1.41 instead of -1.67?

The move Nxd3+ is probably just about as good as Nd2.

But in this case:

Code: Select all

1nrqk2r/p3bpp1/bpn1p3/3pP2p/3P4/PP3N1P/1B2NPP1/RB1QR1K1 b k - acd 25; ce -84; bm Na5; id "Pos.104 Filguth-Kortchnoi, Sao Paulo 1979"; c0 "original position"; pv Na5 Bd3 Bxd3 Qxd3 Nbc6 Rf1 O-O Nf4 h4 Bc1 Qc7 Bd2 Nb8 Ra2 Qb7 Qb1 Rfe8 Re1 Nd7 Qd3 a6 Nh5 g6 Bxa5 bxa5 Nf4 Qb5;

1nrq3r/p2kbpp1/bpn1p3/3pP2p/3P4/PP3N1P/1B2NPP1/RB1QR1K1 w - - acd 25; ce 61; bm b4; id "Pos.104 Filguth-Kortchnoi, Sao Paulo 1979"; c0 "after making move Kd7"; pv b4 g5 Nh2 Bc4 Ng3 h4 Ngf1 a5 bxa5 Nxa5 Nd2 Ke8 Ng4 Nbc6 a4 Ba6 Qf3 Nb4 Bc3 Nbc6 Bd3 Nc4 Qe2 Nb4 Bxc4 dxc4 Bxb4 Bxb4 Nf6+ Kf8;

The solution given (...Kd7) was correct since white's advantage is lower?

Hard to say on this one. Neither analysis shows an advantage for the original side to move.

What time did you let run the engine (Rybka 3?)?

I used several engines. I would be interested to know if an engine finds the original solution after lengthy analysis.
About 10 minutes, if I recall correctly. The time is not as important as the depth, since different hardware and software will take longer or shorter to get to the same depth but the answers should be roughly equivalent at the same depth most of the time.

Other positions not mentioned are correct?

The other positions resolved to the best move stated in the problem (and most of them in under one second). That does not mean that they are correct, but probably they are.