+ 39 hard positions from the ERET suite (reposted 2 weeks ago)
+ 9 positions from the Chichitza suite (sometimes hard for engines)
the 62 EPD lines are listed at the end of this message.
Results with Stockfish_18111220 on 6*4GHz, 300 Seconds per positions, Syzygy 6 pieces.
4 runs. Timings are in second unit.
Code: Select all
Solution 1st run 2nd run 3rd run 4th run #found avg time
1) Nf3-g5 Nf3-g5 72 Nf3-g5 48 Nf3-g5 98 Nf3-g5 60 4 69,5
2) Rd1-d3 Qh4-h6 b2xc3 Rd1-d3 125 b2xc3 1 125,0
3) Bg5-f6 Nd4-b5 Nd2-f3 Bg5-f6 183 Ra1-c1 1 183,0
4) Rg2xg7 Rg2xg7 23 Rg2xg7 27 Rg2xg7 7 Rg2xg7 20 4 19,3
5) Qd1-h5 Bc4-d3 Qd1-h5 188 Qd1-h5 67 Qd1-h5 152 3 135,7
6) Bg1-d4 Bg1-d4 4 Bg1-d4 14 Bg1-d4 6 Bg1-d4 10 4 8,5
7) Ng3-h5 Ng3-h5 58 Ng3-h5 41 Ng3-h5 218 Ng3-h5 94 4 102,8
8) e4-e5 e4-e5 50 e4-e5 86 e4-e5 129 e4-e5 78 4 85,8
9) Bd3xh7 Bc7xb8 Bc7xb8 Bd3xh7 21 Bc7xb8 1 21,0
10) Rf1-c1 Rf1-c1 84 Rf1-c1 45 Rf1-c1 37 Rf1-c1 67 4 58,3
11) .. Qd3xg3 Qd3-e2 Qd3-e2 Qd3-d7 Qd3-e2 0 -------
12) .. f3xg2, Rd3-d2 Rd3-d2 17 f3xg2 14 Rd3-d2 13 Rd3-d2 3 4 11,8
13) b3-b4 b3-b4 114 Ng3-e2 b3-b4 25 b3-b4 56 3 65,0
14) Na8-c7, Rh5xh6 Rh5xh6 0 Rh5xh6 0 Rh5xh6 0 Rh5xh6 0 4 0,0
15) Nf8-g6 Nf8-g6 288 Nf8-g6 247 Nf8-g6 113 Nf8-g6 66 4 178,5
16) Qb3xd5 Qb3xd5 0 Qb3xd5 0 Qb3xd5 0 Qb3xd5 0 4 0,0
17) Qh3-d3 Qh3-d3 45 Qh3-d3 37 Qh3-d3 10 Qh3-d3 59 4 37,8
18) .. Rb8xb2 Rb8xb2 8 Rb8xb2 5 Rb8xb2 6 Rb8xb2 16 4 8,8
19) .. Qa5-g5 Qa5-g5 2 Qa5-g5 0 Qa5-g5 3 Qa5-g5 1 4 1,5
20) Ne3-f5 Ne3-f5 149 Ne3-f5 136 Nf3xd4 Ne3-f5 54 3 113,0
21) Bd3xh7 Bd3xh7 7 Rc2-c3 Bd3xh7 38 Bd3xh7 3 3 16,0
22) g2-g4 g2-g4 20 g2-g4 3 g2-g4 6 g2-g4 38 4 16,8
23) Nf1-g3 Kb1-c1 Nf1-g3 280 Nf1-g3 211 a2-a4 2 245,5
24) Na3xb5 Na3xb5 3 Na3xb5 1 Na3xb5 2 Na3xb5 7 4 3,3
25) b6-b7 Rf5-f8 b6-b7 217 b6-b7 123 Rf5-f8 2 170,0
26) Nc7-a8 Rc2-f2 Rc2-f2 Rc2-f2 Rc2-f2 0 -------
27) a2-a3 a2-a3 3 a2-a3 19 a2-a3 3 a2-a3 25 4 12,5
28) Rb3-b4 Rb3-b4 0 Rb3-b4 67 Rb3-b4 1 Rb3-b4 18 4 21,5
29) Nf4-d3 h4xg5 Nf4-d3 137 Nf4-d3 63 Nf4-d3 162 3 120,7
30) f2-f4 f2-f4 3 f2-f4 5 f2-f4 1 f2-f4 1 4 2,5
31) .. c4-c3 c4-c3 45 c4-c3 21 c4-c3 41 c4-c3 23 4 32,5
32) d5-d6 Ne2-c3 Ne2-c3 Ne2-c3 d5-d6 39 1 39,0
33) Qe3-d3 Qe3-d3 6 Qe3-d3 62 Qe3-d3 45 Qe3-d3 98 4 52,8
34) .. Qc7-b6 Qc7-b6 14 Qc7-b6 35 Qc7-b6 66 Qc7-b6 36 4 37,8
35) Kf2-e1 Rd5xd4 Rd5xd4 Rd5xd4 Kf2-e1 70 1 70,0
36) f4-f5 Nf2-e4 Nf2-e4 f4-f5 0 Nf2-e4 1 0,0
37) Qd1xe2 Qd1xe2 267 Qd1xe2 11 Re1xe2 Qd1xe2 54 3 110,7
38) .. Qh5-f5 g4xh3 g4xh3 g4xh3 g4xh3 0 -------
39) g5xf6 g5xf6 45 g5xf6 34 g5xf6 33 g5xf6 14 4 31,5
40) Qe2xe8 Qe2xe8 56 Qe2xe8 157 Qe2xe8 45 Qe2xe8 76 4 83,5
41) .. Bg5-c1 Bg5-c1 7 Bg5-c1 5 Bg5-c1 4 Bg5-c1 6 4 5,5
42) Bh6-g7 Bh6-e3 Bh6-g7 206 Bh6-e3 Be2xc4 1 206,0
43) c4-c5 c4-c5 3 c4-c5 9 c4-c5 80 c4-c5 18 4 27,5
44) e7-e8N e7-e8N 7 e7-e8N 24 e7-e8N 17 e7-e8N 0 4 12,0
45) f3-f4 Ke8-d7 Ke8-d7 Ke8-d7 Ke8-d7 0 -------
46) Nf7-d6 Nf7-h6 Nf7-h6 Nf7-h6 Nf7-h6 0 -------
47) .. Rd6-f6 Rd6-d7 Rd6-f6 184 Rd6-d7 Rd6-f6 235 2 209,5
48) Nf3xg5 Nf3xg5 10 Nf3xg5 18 Nf3xg5 16 Nf3xg5 4 4 12,0
49) Ke5-f6 Ke5-f6 98 Ke5-f6 259 Ke5-f6 55 Ke5-f6 73 4 121,3
50) c4-c5 Bf2-e3 c4-c5 232 c4-c5 55 Kd3-e3 2 143,5
51) Kf1-e2(?) Re4-e8 10 Re4-e8 12 Re4-e8 5 Re4-f4 0 4 6,8
52) Kb7-c8 a5-a6 a5-a6 a5-a6 a5-a6 0 -------
53) .. Rb8-b5 Rb8-b5 22 Rb8-b5 8 Rb8-b5 32 Rb8-b5 4 4 16,5
54) Nh8-f7 Nh8-f7 0 Nh8-f7 5 Nh8-f7 0 Nh8-f7 1 4 1,5
55) Nb8-c6 Bc1-d2 Nb8-d7 Nh3-f2 Nb8-d7 0 -------
56) g4-g5 g4-g5 0 g4-g5 0 g4-g5 0 g4-g5 0 4 0,0
57) Nh7-f8 e7-e8Q e7-e8Q Kd3-c3 e7-e8Q 0 -------
58) Bf4-e3 Bf4-e3 1 Bf4-e3 106 Be4-d3 Bf4-e3 23 3 43,3
59) Bd1-b3 Bd1-b3 0 g6xh7 g6xh7 Bd1-b3 0 2 0,0
60) Nh3-g5 Nh3-g5 0 Nh3-g5 0 Nh3-g5 0 Nh3-g5 0 4 0,0
61) Qa3-h3 Qa3-h3 292 Bb7-c8 Bb7-c8 Bb7-c8 1 292,0
62) Nc6xe7 Nf5-d4 Kd1-d2 Rc1-c3 Nc6xe7 2 1 2,0
Code: Select all
1r3rk1/3bqpp1/p3p2p/n1ppP2N/2nP1P1P/2PQ1N2/P3B1P1/2R2RK1 w - - bm Ng5;
r2q1rk1/p1pn1p2/1p2pPp1/3p2B1/2PP3Q/2b5/PP3P1P/2KR2Nb w - - bm Rd3;
r1b1qk1r/pn3pp1/1p2p3/3pP1Bp/1bPN4/4Q1R1/P2N1PP1/R5K1 w - - bm Bf6;
6r1/2rp1kpp/2qQp3/p3Pp1P/1pP2P2/1P2KP2/P5R1/6R1 w - - bm Rxg7+ ; c0 Shirov mate in 14
rnbq3r/pppp4/3b1pkp/5p2/2BP4/4P3/PPP2PPP/RN1QK2R w KQ - bm Qh5+;
8/8/5p2/6Q1/8/p1K5/p2pp2p/k5B1 w - - bm Bd4;
2R5/p4pkp/2br1qp1/5P2/3p4/1P2Q1NP/P1P3P1/6K1 w - - bm Nh5+;
1N6/2pp4/3k1P2/p7/1pK1P3/5P1P/3r2N1/8 w - - bm e5+;
1r3rk1/1pB2ppp/2b1p3/3pP3/p4Q2/P2B4/1P3PPP/2R3K1 w - - bm Bxh7+; c0 mate in 12 ;
8/2r3k1/8/1p1p1p2/p2PbPp1/PB4P1/1P1K4/5R2 w - - bm Rc1; c0 fortress;
7k/4PBNp/7P/2p5/2P5/2rq2Pp/1P3P1K/8 b - - bm Qxg3+;
5rk1/6b1/2Bp2p1/1RpP2np/P1P1P2P/3r1p2/1P3BP1/4R1K1 b - - bm fxg2 Rd2; easy ;
1k1r2r1/pb5n/1qpp2pP/1pb1p3/4P3/1PNP1QN1/1PPB4/2K2R1R w - - bm b4; c0 already in hard 2018 ;
Nq3n1k/8/P1p2Npp/2Kp3R/pp6/n3p3/8/4Q3 w - - bm Nc7; c0 Rxh6??
r1n2N1k/2n2K1p/3pp3/5Pp1/b5R1/8/1PPP4/8 w - - bm Ng6; id "ERET 002 - Zugzwang";
r2qk2r/ppp1bppp/2n5/3p1b2/3P1Bn1/1QN1P3/PP3P1P/R3KBNR w KQkq - bm Qxd5; id "ERET 008 - Zentrum";
8/p2p4/r7/1k6/8/pK5Q/P7/b7 w - - bm Qd3; id "ERET 015 - Endspiel";
1r3rk1/6p1/p1pb1qPp/3p4/4nPR1/2N4Q/PPP4P/2K1BR2 b - - bm Rxb2; id "ERET 017 - Koenigsangriff";
r1b1kb1r/1p1n1p2/p3pP1p/q7/3N3p/2N5/P1PQB1PP/1R3R1K b kq - bm Qg5; id "ERET 018 - Entwicklung";
3kB3/5K2/7p/3p4/3pn3/4NN2/8/1b4B1 w - - bm Nf5; id "ERET 019 - Endspiel";
1nrrb1k1/1qn1bppp/pp2p3/3pP3/N2P3P/1P1B1NP1/PBR1QPK1/2R5 w - - bm Bxh7; id "ERET 020 - Laeuferopfer h7";
8/3Pk1p1/1p2P1K1/1P1Bb3/7p/7P/6P1/8 w - - bm g4; id "ERET 027 - Zugzwang";
8/7p/5P1k/1p5P/5p2/2p1p3/P1P1P1P1/1K3Nb1 w - - bm Ng3; id "ERET 032 - Zugzwang";
r3k2r/5ppp/3pbb2/qp1Np3/2BnP3/N7/PP1Q1PPP/R3K2R w KQkq - bm Nxb5; id "ERET 035 - Qualitaetsopfer";
r1k1n2n/8/pP6/5R2/8/1b1B4/4N3/1K5N w - - bm b7; id "ERET 036 - Endspiel";
1k6/bPN2pp1/Pp2p3/p1p5/2pn4/3P4/PPR5/1K6 w - - bm Na8; id "ERET 037 - Zugzwang";
r1b1k2r/pp3ppp/1qn1p3/2bn4/8/6P1/PPN1PPBP/RNBQ1RK1 w kq - bm a3; id "ERET 039 - Entwicklung";
5rk1/p1p1rpb1/q1Pp2p1/3Pp2p/4Pn2/1R4N1/P1BQ1PPP/R5K1 w - - bm Rb4; id "ERET 045 - Initiative";
8/4nk2/1p3p2/1r1p2pp/1P1R1N1P/6P1/3KPP2/8 w - - bm Nd3; id "ERET 046 - Endspiel";
r1b1kq1r/1p1n2bp/p2p2p1/3PppB1/Q1P1N3/8/PP2BPPP/R4RK1 w kq - bm f4; id "ERET 049 - Entwicklung";
2b1r3/5pkp/6p1/4P3/QppqPP2/5RPP/6BK/8 b - - bm c3; id "ERET 054 - Endspiel";
r2qr1k1/pp1bbp2/n5p1/2pPp2p/8/P2PP1PP/1P2N1BK/R1BQ1R2 w - - bm d6; id "ERET 057 - Abtausch";
rq6/5k2/p3pP1p/3p2p1/6PP/1PB1Q3/2P5/1K6 w - - bm Qd3; id "ERET 059 - Endspiel";
1r3rk1/2qbppbp/3p1np1/nP1P2B1/2p2P2/2N1P2P/1P1NB1P1/R2Q1RK1 b - - bm Qb6; id "ERET 065 - Zwischenzug";
8/2pN1k2/p4p1p/Pn1R4/3b4/6Pp/1P3K1P/8 w - - bm Ke1; id "ERET 066 - Endspiel";
1r4k1/1nq3pp/pp1pp1r1/8/PPP2P2/6P1/5N1P/2RQR1K1 w - - bm f5; id "ERET 071 - Ablenkung";
r4rk1/ppp2ppp/1nnb4/8/1P1P3q/PBN1B2P/4bPP1/R2QR1K1 w - - bm Qxe2; id "ERET 073 - Mobilitaet";
6r1/6r1/2p1k1pp/p1pbP2q/Pp1p1PpP/1P1P2NR/1KPQ3R/8 b - - bm Qf5; id "ERET 075 - Festung";
r3r1k1/1bq2ppp/p1p2n2/3ppPP1/4P3/1PbB4/PBP1Q2P/R4R1K w - - bm gxf6; id "ERET 077 - Rochadeangriff";
r1bqr1k1/3n1ppp/p2p1b2/3N1PP1/1p1B1P2/1P6/1PP1Q2P/2KR2R1 w - - bm Qxe8; id "ERET 079 - Damenopfer";
5rk1/1ppbq1pp/3p3r/pP1PppbB/2P5/P1BP4/5PPP/3QRRK1 b - - bm Bc1; id "ERET 080 - Raeumung";
4r1k1/1r1np3/1pqp1ppB/p7/2b1P1PQ/2P2P2/P3B2R/3R2K1 w - - bm Bg7; id "ERET 084 - Koenigsangriff";
r3k2r/pp2pp1p/8/q2Pb3/2P5/4p3/B1Q2PPP/2R2RK1 w kq - bm c5; id "ERET 086 - Qualitaetsopfer";
8/2P1P3/b1B2p2/1pPRp3/2k3P1/P4pK1/nP3p1p/N7 w - - bm e8N; id "ERET 089 - Unterverwandlung";
4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - - bm f4; id "ERET 090 - Endspiel";
2b1r3/r2ppN2/8/1p1p1k2/pP1P4/2P3R1/PP3PP1/2K5 w - - bm Nd6; id "ERET 093 - Endspiel";
2k2Br1/p6b/Pq1r4/1p2p1b1/1Ppp2p1/Q1P3N1/5RPP/R3N1K1 b - - bm Rf6; id "ERET 094 - Damenopfer";
r2qk2r/ppp1b1pp/2n1p3/3pP1n1/3P2b1/2PB1NN1/PP4PP/R1BQK2R w KQkq - bm Nxg5; id "ERET 095 - Damenopfer";
8/8/4p1Pk/1rp1K1p1/4P1P1/1nP2Q2/p2b1P2/8 w - - bm Kf6; id "ERET 096 - Endspiel";
2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - - bm c5; id "ERET 097 - Endspiel";
8/6pp/5k2/1p1r4/4R3/7P/5PP1/5K2 w - - am Ke2; id "ERET 098 - Endspiel";
4k1br/1K1p1n1r/2p2pN1/P2p1N2/2P3pP/5B2/P2P4/8 w - - bm Kc8; id "ERET 103 - Zugzwang";
1r1r2k1/2pq3p/4p3/2Q1Pp2/1PNn1R2/P5P1/5P1P/4R2K b - - bm Rb5; id "ERET 107 - Verteidigung";
2k4N/Q1np4/2p2Bpp/1p1P4/pPP1p2P/P7/7q/1K6 w - - bm Nf7;
1N4K1/1pp1p3/7k/2r3pP/p2pp1P1/P6N/8/2B5 w - - bm Nc6;
4B3/k1K1pp2/p3bq2/2p1p3/1p2P1P1/4P2Q/nR6/8 w - - bm g5;
8/4Pr1N/8/6PN/8/3K1ppp/4prkb/4Bbnn w - - bm Nf8;
8/q1p1N1p1/3p1p1p/pk5P/1p2BB2/8/PK3P2/8 w - - bm Be3;
6kq/2p4p/6P1/5nN1/K7/2P5/7B/3B4 w - - bm Bb3+;
5k2/2p4p/6P1/1p3n2/3q4/PB4BN/KP5P/8 w - - bm Ng5;
8/1B3b1p/7P/p2p4/P2pp1kp/Q7/1N1Pq2P/7K w - - bm Qh3;
6k1/1qr1p2p/ppN5/3p1N2/6p1/1P1P2Pp/PP2PP1P/2RK4 w - - bm Ncxe7+;