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Subject: Yet another test suite: Samuel Loyd checkmates

Author: Vladimir Medvedev

Date: 03:33:41 10/22/03


I am not sure all these tasks has unique solution (at least two of them are
incorrect, but I can't remember their numbers :(

Now much can your engine solve at 1 sec/position?
With/without null-move?

GreKo is very weak at this test... (52 correct at 1 sec, Pentium-4/1.8 GHz)

8/8/7p/5K1k/8/6p1/5bPP/4N3 w - - bm Nf3; id "Loyd-100, #6";
8/6R1/7p/5K1k/8/6p1/5bP1/8 w - - bm Rb7; id "Loyd-099, #5";
8/6R1/7p/5K1k/8/6p1/5bPP/8 w - - bm hxg3; id "Loyd-098, #4";
8/6R1/7p/5K1k/8/6p1/5bPP/4N3 w - - bm Rxg3; id "Loyd-097, #3";
b7/8/7B/7p/8/2p3r1/2P1P1pp/4K1kq w - - bm Bc1; id "Loyd-096; #5";
6b1/4Kpk1/5r2/8/3B2P1/7R/8/8 w - - bm Rh6; id "Loyd-095; #5";
n1rb4/1p3p1p/1p6/1R5K/8/p3p1PN/1PP1R3/N6k w - - bm b4; id "Loyd-094; #5";
8/8/8/p7/8/8/R6p/2K2Rbk w - - bm Raf2; id "Loyd-093, #5";
B7/b2p3p/1R1P4/7p/2k4p/2p4p/2p1P2P/2K3Q1 w - - bm Bh1; id "Loyd-092; #5";
8/8/8/8/8/Q7/4p3/5k1K w - - bm Qf8; id "Loyd-091";

8/4K3/4N3/8/4kP2/1P2n2P/4Q3/8 w - - bm Ke8; id "Loyd-090, #4";
8/8/8/3p4/1N1P2Kp/Bkp5/5Q2/4N3 w - - bm Qf8; id "Loyd-089, #4";
4Q3/4p3/4k3/8/1P2NK2/8/8/8 w - - bm Ke3; id "Loyd-088, #4";
8/p7/8/1B6/N7/k7/2KB4/8 w - - bm Nb6; id "Loyd-087, #4";
8/8/7K/4P2p/6bk/7p/5R1P/B7 w - - bm Rb2; id "Loyd-086, #4";
8/8/1Kp5/2PR4/2P5/B2pp3/7P/3kNB1R w - - bm Rd8; id "Loyd-085, #4";
8/3p4/7p/1p1Q1p1P/1P1p1B1K/2prr1p1/2PkP3/6R1 w - - bm Qa8; id "Loyd-084, #4";
K6Q/1p6/pPq4P/P2p2P1/4pP1N/7k/n5R1/1n2BB2 w - - bm Bxa6; id "Loyd-083, #4";
8/8/2P2Q2/2p5/6B1/2Bk4/8/5K2 w - - bm Bd2; id "Loyd-082; #4";
3b4/8/1R6/8/8/5R2/7P/4BK1k w - - bm Rff6; id "Loyd-081; #4";

8/1p6/1Pk1p3/pRN1P1K1/p1B1P3/2P5/P7/8 w - - bm Be2; id "Loyd-080, #4";
8/7p/8/7p/7R/4K1kp/5R2/8 w - - bm Rh2; id "Loyd-079, #4";
2b5/2P5/pp1p4/3p3P/3Pk3/2p1p1P1/2K5/3Q1B2 w - - bm Bb5; id "Loyd-078, #4";
4R3/2p2p2/2P2B1p/N2pPk1P/p2p1p1R/1p1P1N2/1q1P3K/8 w - - bm Ra8; id "Loyd-077,
#4";
8/8/3N4/3P1p2/2P2p1p/5k1K/3RR3/1N6 w - - bm Ne4; id "Loyd-076, #4";
8/8/8/2Q5/5k2/4p2K/4p3/4N3 w - - bm Qb5; id "Loyd-075, #4";
rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - bm Nd8; id "Loyd-074, #4";
8/8/8/8/4p3/2N3R1/5p2/K2Rbk2 w - - bm Ka2; id "Loyd-073, #4";
2b1q1nN/Q1Ppp3/4p1p1/2P1k1Bn/1R2B3/4p1r1/1b1NP2r/1K3R2 w - - bm Qa1; id
"Loyd-072, #4";
n7/3p1p2/NpkNp1p1/1p2P3/3Q4/6B1/b7/4K3 w - - bm Qg1; id "Loyd-071, #4";

8/8/8/8/7k/8/PPPPPPPP/RNBQKBNR w KQ - - bm d4; id "Loyd-070, #3";
8/8/1Q6/6N1/8/2kP4/4K3/8 w - - bm Kd1; id "Loyd-069b, #3";
8/8/1Q6/6N1/8/2KP4/4k3/8 w - - bm Ne6; id "Loyd-069a, #3";
brnR1K2/pkP1P3/1bR5/1P6/1N1n4/1N6/P4p2/1Q3B2 w - - bm Na6; id "Loyd-068, #3";
1K6/P3pb2/2P5/rp1k1p1R/4R3/1p2Qp2/1pq1pB2/4n3 w - - bm Re6; id "Loyd-067, #3";
6K1/n1P2N1p/6pr/b1pp3b/n2Bp1k1/1R2R1Pp/3p1P2/2qN1B2 w - - bm Rb6; id "Loyd-066,
#3";
b7/p1BR2pK/B1p5/pNk3p1/Pp4Pp/1P3n2/4R2r/7n w - - bm Bb7; id "Loyd-065, #3";
8/1B6/8/1N6/5P2/K3k2P/Q7/8 w - - bm Nd4; id "Loyd-064, #3";
4r1b1/1p4B1/pN2pR2/RB2k3/1P2N2p/2p3b1/n2P1p1r/5K1n w - - bm Ke2; id "Loyd-063,
#3 (Steinitz Gambit)";
bKN5/B7/pPP1R1n1/Q4p2/2k5/2p3p1/3p1R2/nr1N3B w - - bm Re1; id "Loyd-062, #3";
8/4p3/8/8/6Q1/3PK1p1/4P3/1b2k3 w - - bm Qg7; id "Loyd-061, #3";

2N2B2/8/8/6P1/2p1P2R/2pk4/2R5/K2B1N2 w - - bm Bg4; id "Loyd-060, #3";
3Q4/R1KP4/2P3p1/1k3r2/2p5/P7/8/8 w - - bm Qe8; id "Loyd-059, #3";
8/1p4p1/1R2r3/4p2B/PPkB3P/RN1bp3/2p1p3/2N1K2Q w - - bm Qe4; id "Loyd-058, #3";
8/8/8/8/3N4/8/5K1p/4R1nk w - - bm Re2; id "Loyd-057, #3";
8/8/8/8/3N3Q/4p1n1/1K1Rp3/4k3 w - - bm Nf5; id "Loyd-056, #3";
8/1b3P2/3p1R2/3k4/3NpB2/3pQ2B/K7/8 w - - bm Ne6; id "Loyd-055, #3";
Q7/5p2/5P1p/5PPN/6Pk/4N1Rp/7P/6K1 w - - bm Qh1; id "Loyd-054, #3";
3n4/6n1/3p2p1/2pP1pP1/K1pk1Bp1/p1Nb4/p2R1P2/Q6R w - - bm Re1; id "Loyd-053, #3";
8/6pK/4N1P1/1R1PP3/2PBkP2/3N2p1/6Pp/2R4Q w - - bm Rg1; id "Loyd-052, #3";
6K1/8/7p/5p2/4k3/5N2/2PQ2R1/7n w - - bm Qc3; id "Loyd-051, #3";

8/2p5/2p5/k1K5/8/3Q4/8/3b4 w - - bm Qg3; id "Loyd-050, #3";
6K1/7P/8/1p4Q1/5N2/1P6/6pP/4Rbbk w - - bm h8=N; id "Loyd-049, #3";
8/p7/1Pn5/nk1N4/4R3/2Q5/1K6/8 w - - bm Ra4; id "Loyd-048, #3";
8/6p1/6Qp/3N1p1P/2P5/5k2/2P1p3/4K1B1 w - - bm Ba7; id "Loyd-047, #3";
5N1k/5Ppp/8/8/2Q3p1/8/8/b6K w - - bm Qf1; id "Loyd-046, #3";
8/1B6/1p6/k5rQ/p2N1p1n/K7/4b3/8 w - - bm Nb3; id "Loyd-045";
8/1n5Q/7P/8/4PN2/5N2/6PP/1K4Bk w - - bm Bc5; id "Loyd-044, #3";
8/8/1Q6/1pP5/k7/8/K7/8 w - - bm Qh6; id "Loyd-043, #3";
8/8/3p4/6QR/4b3/7P/5K1P/6Bk w - - bm Qg8; id "Loyd-042, #3";
8/PP3k2/5P2/5K2/8/8/8/8 w - - bm Pa8b; id "Loyd-041";

8/5PkP/4K3/8/5P2/8/8/8 w - - bm f8=R; id "Loyd-040, #3";
8/n4B2/1p5q/2PNNp1p/1bRPkp1K/rr5n/1p1P1P1B/6Qb w - - bm Qg8; id "Loyd-039, #3";
8/1K2Q3/8/3k4/Pp1P1P2/8/1B6/8 w - - bm Qh7; id "Loyd-038, #3";
8/8/2p5/2K2p2/5P2/4NB2/5kP1/7Q w - - bm Qh8; id "Loyd-037, #3";
8/5N2/2k5/4p3/1B6/K2Q4/8/8 w - - bm Qh7; id "Loyd-036, #3";
2n5/6p1/8/5p2/8/7N/3pp1B1/KQ1bk3 w - - bm Ba8; id "Loyd-035, #3";
k7/b5R1/1p3Q2/1p6/1K6/1P6/6b1/8 w - - bm Rf7; id "Loyd-034, #3";
8/8/2Q5/4N3/6r1/8/5p1k/5Kb1 w - - bm Qh1; id "Loyd-033, #3";
6b1/b2nB3/4p2r/1Np1kp2/2p2N2/K1P1PP2/2B5/8 w - - bm Ba4; id "Loyd-032, #3";
6R1/2K5/8/8/5p2/6p1/1Q3Nk1/8 w - - bm Ng4; id "Loyd-031, #3";

8/8/8/8/8/6P1/6k1/4KR1R w K - bm Rf4; id "Loyd-030, #3";
8/4K3/8/1R6/3kP3/8/8/4Q3 w - - bm Rb3; id "Loyd-029, #3";
8/8/8/2K5/6kP/4Q3/8/5B2 w - -  bm Bc4; id "Loyd-028, #3";
8/3QPk2/8/8/8/8/4K3/8 w - - bm Qd6; id "Loyd-027, #3";
8/2p2p2/2P2B2/8/2QN1k2/5P2/3K1P1P/8 w - - bm Qe6; id "Loyd-026, #3";
r7/6p1/6pk/4Q1N1/6pK/5N2/8/1b6 w - - bm Qb8; id "Loyd-025, #3";
8/5Pq1/2R3P1/2PP2B1/K1p1p3/N1kpN2R/3n3Q/b7 w - - bm Rh8; id "Loyd-024, #2";
8/1n1NBP1K/5Rpn/r4B2/r4k1p/4p3/6Q1/7N w - - bm Ra6; id "Loyd-023, #2";
6r1/6p1/4N2B/4N1R1/8/4k2K/1Q6/8 w - - bm Qa1; id "Loyd-022, #2";
5R2/8/2p3B1/3k1N2/4R3/1K2b3/8/7Q w - - bm Qa1; id "Loyd-021";

8/8/8/8/3B1N2/4N3/3RpkPR/1K6 w - - bm Be5; id "Loyd-020";
8/8/2K5/6Q1/2B1k3/2P2b1R/3prn2/3N4 w - - bm Bb3; id "Loyd-019";
5Q2/5B1k/6r1/6p1/6N1/6K1/8/8 w - - bm Qa8; id "Loyd-018";
8/4N3/8/4p1P1/2K4p/3B1k1p/R6P/2Q5 w - - bm Bc2; id "Loyd-017";
8/8/7p/4K1kb/8/7R/7Q/8 w - - bm Qa2; id "Loyd-016";
5B2/3n4/2Ppp3/3kN1Q1/1R6/3P4/2K5/8 w - - bm Qd8; id "Loyd-015";
2R5/8/3k4/3N2p1/4K1Q1/8/8/8 w - - bm Kf5; id "Loyd-014";
8/2N5/8/k2NQ3/P1R5/Pp6/n2p4/1K1B4 w - - bm Qa1; id "Loyd-013";
n6k/7b/Q4Kp1/8/8/8/8/8 w - - bm Qa1; id "Loyd-012";
1B6/3Q4/6Rn/8/4k3/1P2pq2/K7/7B w - - bm Rg2; id "Loyd-011";

8/8/8/1K3pr1/5R2/5QRp/6qp/7k w - - bm Qa8; id "Loyd-010";
8/5Q1N/2R5/4p3/p2pk3/R1p4P/5B2/4K3 w - - bm Qb7; id "Loyd-009";
8/7K/2Rn1N2/6k1/6N1/2n4p/8/4QR2 w - - bm Nf2; id "Loyd-008";
8/5N2/4p3/2K5/4k3/7R/3B2Rn/3b3Q w - - bm Rf3; id "Loyd-007";
7R/8/8/8/6pq/7k/4Np1r/5KbQ w - - bm Qa8; id "Loyd-006";
8/1pN5/1Pb5/n1q1n3/8/PpkpP2Q/1N1R4/2K5 w - - bm Qc8; id "Loyd-005";
2brrb2/p7/p7/7Q/1p1kpPp1/1P1pN1P1/3K4/8 w - - bm Qa5; id "Loyd-004";
4br1n/8/4p2Q/3p1k2/4p1N1/1B4K1/8/8 w - - bm Ba2; id "Loyd-003";
8/8/8/6Q1/4R3/2K2p2/5k2/5b2 w - - bm Re1; id "Loyd-002";
7B/2R1KnQ1/1p1PP3/3k4/2N5/r3p1N1/4n3/1q6 w - - bm Qa1; id "Loyd-001";



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