Remember Leonid Liberman (author of LLCHESS)?

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Dann Corbit
Posts: 10107
Joined: Wed Mar 08, 2006 7:57 pm
Location: Redmond, WA USA
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Remember Leonid Liberman (author of LLCHESS)?

Post by Dann Corbit » Sat May 23, 2015 1:36 am

Ode to Leonid...

Here are 100 checkmates for the side to move:

Code: Select all

1R1n1K2/krbb1P1P/3n1Q1R/3r1Q1Q/1R3B1q/1NNQPB1q/7q/qqqqq2q w - -
2K1n1R1/P1P1bbrk/R1Q1n3/Q1Q1r3/q1B3R1/q1BPQNN1/q7/q2qqqqq w - -
3n1K2/krbb1P1P/1R1n1Q1R/3r1Q1Q/1R3B1q/1NNQPB1q/7q/qqqqq2q w - -
2K1n3/P1P1bbrk/R1Q1n1R1/Q1Q1r3/q1B3R1/q1BPQNN1/q7/q2qqqqq w - -
Q2QQQQQ/Q7/Q1bpqnn1/Q1b3r1/q1q1R3/r1q1N3/p1p1BBRK/2k1N1r1 b - -
2BBN3/4P2p/2q1Q1nq/1nQbQpNk/qQ1B2Rr/1pQ1KRb1/3QQp2/1r1qn3 b - -
3NBB2/p2P4/qn1Q1q2/kNpQbQn1/rR2B1Qq/1bRK1Qp1/2pQQ3/3nq1r1 b - -
1R1QN3/3qqP2/1Pq1krB1/Qq1b2rR/1NqBqPnK/2Q1q1NQ/4p2P/2bbn3 w - -
3NQ1R1/2Pqq3/1Brk1qP1/Rr2b1qQ/KnPqBqN1/QN1q1Q2/P2p4/3nbb2 w - -
1b2k2b/1b1rBr1b/4Q3/2Q1n1Q1/2qRQRq1/2QQKQQ1/2qnBnq1/1qN1Q1Nq b - -
1Qn1q1nQ/2QNbNQ1/2qqkqq1/2QrqrQ1/2q1N1q1/4q3/1B1RbR1B/1B2K2B w - -
kqqqqqrb/q6B/q6R/q2Nn1bQ/q2nN2Q/r6Q/7Q/BRQQQQQK b - -
kqqqqqrb/q7/q6R/q2nN2Q/qB1Nn2Q/r6Q/b6Q/BRQQQQQK w - -
brqqqqqk/7q/R6q/Q2Nn2q/Q2nN1Bq/Q6r/Q6b/KQQQQQRB w - -
2k2Br1/4qN1P/2P1bn1b/PPr5/R4Pn1/3B2K1/3p2N1/3QR3 b - -
brqqqqqk/B6q/R6q/Qb1nN2q/Q2Nn2q/Q6r/Q7/KQQQQQRB b - -
BQ4QN/B1qknp1Q/R6K/N1qnqq1b/R6b/Q1bQQr1n/P6p/2QrqQ2 b - -
brqqqqqk/7q/R6q/Q2NnB1q/Q2nN2q/Q6r/Q6b/KQQQQQRB w - -
kqqqqqrb/q6B/q6R/q2Nn2Q/q2nNb1Q/r6Q/7Q/BRQQQQQK b - -
brqqqqqk/B6q/R6q/Q2nN2q/Q2Nn2q/Q6r/Q3b3/KQQQQQRB b - -
brqqqqqk/3B3q/R6q/Q2Nn2q/Q2nN2q/Q6r/Q6b/KQQQQQRB w - -
BQ4QN/B1qknp1Q/R6K/N1qnqq1b/R6b/Q1bQQr1n/P4q1p/2Qr1Q2 b - -
2q1Rq2/P2Q3p/N1RqqB1q/B6r/B1QQNQ1n/k6r/q1PNKQ1b/nq4qb w - -
kqqqqqrb/q7/q6R/q1BnN2Q/q2Nn2Q/r6Q/b6Q/BRQQQQQK w - -
2qR1q2/p3Q2P/q1BqqR1N/r6B/n1QNQQ1B/r6k/b1QKNP1q/bq4qn w - -
kqqqqqrb/q6B/q6R/q2Nn2Q/q2nN2Q/r6Q/3b3Q/BRQQQQQK b - -
NQ4QB/Q1pnkq1B/K6R/b1qqnq1N/b6R/n1rQQb1Q/p6P/2QqrQ2 b - -
kqqqqqrb/q3B3/q6R/q2nN2Q/q2Nn2Q/r6Q/b6Q/BRQQQQQK w - -
brqqqqqk/B6q/R6q/Q2nN2q/Q1bNn2q/Q6r/Q7/KQQQQQRB b - -
3qr3/3P2n1/3b2k1/r4pN1/ppR5/2p1BN1B/4Qn1p/2K2bR1 w - -
2qR1q2/p4Q1P/q1BqqR1N/r6B/n1QNQQ1B/r6k/b1QKNP1q/bq4qn w - -
BQ4QN/B1qknp1Q/R6K/N1qnqq1b/R6b/Q1bQQr1n/P3q2p/2Qr1Q2 b - -
kqqqqqrb/q1B5/q6R/q2nN2Q/q2Nn2Q/r6Q/b6Q/BRQQQQQK w - -
2qQRq2/P6p/N1RqqB1q/B6r/B1QQNQ1n/k6r/q1PNKQ1b/nq4qb w - -
kqqqqqrb/q6B/q6R/q2Nn2Q/q2nN2Q/r6Q/5b1Q/BRQQQQQK b - -
NQ4QB/Q1pnkq1B/K6R/b1qqnq1N/b6R/n1rQQb1Q/p1q4P/2Q1rQ2 b - -
NQ4QB/Q1pnkq1B/K6R/b1qqnq1N/b6R/n1rQQb1Q/p2q3P/2Q1rQ2 b - -
brqqqqqk/B6q/R6q/Q2nN2q/Q2Nn2q/Q6r/Q1b5/KQQQQQRB b - -
brqqqqqk/5B1q/R6q/Q2Nn2q/Q2nN2q/Q6r/Q6b/KQQQQQRB w - -
2q1Rq2/P1Q4p/N1RqqB1q/B6r/B1QQNQ1n/k6r/q1PNKQ1b/nq4qb w - -
4k3/4q3/8/4Q3/1bRqQqRb/1qQqQqQq/1QbnBnbQ/1rNQKQNr b - -
1rbkqbrQ/PPq3nQ/Bn1qQq1N/1qBQqNqQ/Q2q1qQ1/8/3RR3/3K4 w - -
3k4/3q4/8/3Q4/bRqQqRb1/qQqQqQq1/QbnBnbQ1/rNQKQNr1 b - -
Qrbqkbr1/Qn3qPP/N1qQq1nB/QqNqQBq1/1Qq1q2Q/8/3RR3/4K3 w - -
3k4/3rr3/8/q2Q1Qq1/1QbqQnQ1/bN1QqQqn/ppQ3Nq/1RBKQBRq b - -
4k3/3rr3/8/1qQ1Q2q/qQnQqbQ1/n1QqQ1Nb/qN3Qpp/qRBQKBR1 b - -
1RnqkqnR/1qBNbNBq/1QqQqQqQ/1BrQqQrB/4q3/8/4Q3/4K3 w - -
1rbkqbrQ/PPq3nQ/Bn1qQqQN/1qBQqNq1/Q2q1qQ1/8/3RR3/3K4 w - -
4k3/3rr3/8/1qQ1Q2q/1QnQqbQ1/nqQqQ1Nb/qN3Qpp/qRBQKBR1 b - -
1k2qQ2/1q2qQ2/1q2qQ2/nq2nBb1/NQPBQ3/prpbQq2/rN2Q3/1QKRR3 b - -
2Qq2k1/2Qq2q1/2Qq2q1/2Bn2qn/2bQBPQN/2qQbprp/3Q2Nr/3RRKQ1 b - -
2Qq2k1/2Qq2q1/b1Qq2q1/2Bn2qn/3QBPQN/2qQbprp/3Q2Nr/3RRKQ1 b - -
2Qq2k1/2Qq2q1/2Qq2q1/2Bn2qn/3QBPQN/2qQbprp/3Q2Nr/1b1RRKQ1 b - -
1qkrr1B1/Rn2q3/PRPBqQ2/nqpbq3/NQ2Nb2/1Q2Qq2/1Q2Qq2/1K2Qq2 w - -
3k4/3rr3/8/q2Q1Qq1/1QbqQnQq/bN1QqQ1n/ppQ3Nq/1RBKQBRq b - -
2Qq2k1/2Qq2q1/2Qq2q1/2Bn2qn/3QBPQN/2qQbprp/2bQ2Nr/3RRKQ1 b - -
1qkrr3/Rn2q3/PRPBqQ2/nqpbq3/NQ2NbB1/1Q2Qq2/1Q2Qq2/1K2Qq2 w - -
1B1rrkq1/3q2nR/2QqBPRP/3qbpqn/2bN2QN/2qQ2Q1/2qQ2Q1/2qQ2K1 w - -
1qkrr3/Rn2qB2/PRPBqQ2/nqpbq3/NQ2Nb2/1Q2Qq2/1Q2Qq2/1K2Qq2 w - -
2Qq2k1/2Qq2q1/2Qq2q1/1bBn2qn/3QBPQN/2qQbprp/3Q2Nr/3RRKQ1 b - -
1b2rQbk/P1qQ3N/Q4qB1/2rnP1p1/2R1Q2q/q4QB1/1qQKn1Nq/8 b - -
4b2Q/6Bp/5QBR/4P1bK/3QqrnQ/2PQQRQN/1qqqqqnr/qq4Nk b - -
Kn4QQ/RNQQQQQ1/nqrqqp2/qNRQq3/kB1p4/rbq5/Pb6/q2B4 w - -
8/Qn1NkqQ1/1bq5/Q2q1r2/1P1pNR2/1bQ3Qq/n3qQ1p/KBqR2B1 w - -
Q2b4/pB6/RBQ5/Kb1P4/QnrqQ3/NQRQQP2/rnqqqqq1/kN4qq b - -
Q2NrN1q/q1q3k1/Q3pp2/Qqq3Bp/2B1n2K/P1b2Q1Q/2bR2qn/Q1Q1RrQ1 w - -
q1q1rRq1/2Br2QN/p1B2q1q/2b1N2k/qQQ3bP/q3PP2/Q1Q3K1/q2nRn1Q b - -
1qRr1q1q/NQ2rB2/q1q2B1p/k2N1b2/Pb3QQq/2PP3q/1K3Q1Q/Q1nRn2q b - -
q1NrN2Q/1k3q1q/2pp3Q/pB3qqQ/K2n1B2/Q1Q2b1P/nq2Rb2/1QrR1Q1Q w - -
Q7/pB6/RBQ5/KbbP4/QnrqQ3/NQRQQP2/rnqqqqq1/kN4qq b - -
q1NrN1QQ/1k3q1q/2pp3Q/pB3qq1/K2n1B2/Q1Q2b1P/nq2Rb2/1QrR1Q1Q w - -
1qRr1q1q/NQ2rB2/q1q2B1p/k2N1b2/Pb3QQ1/2PP3q/1K3Q1Q/Q1nRn1qq b - -
q1q1rRq1/2Br2QN/p1B2q1q/2b1N2k/1QQ3bP/q3PP2/Q1Q3K1/qq1nRn1Q b - -
1R4R1/k6q/2q2q2/3NR3/1P1qr1Q1/qNqPqNq1/2nbnrbq/1QBKQBQ1 b - -
1R4R1/q6k/2q2q2/3RN3/1Q1rq1P1/1qNqPqNq/qbrnbn2/1QBQKBQ1 b - -
1R4R1/q6k/2q2q2/3RN3/1Q1rq1P1/1qNqPqN1/qbrnbnq1/1QBQKBQ1 b - -
1R4R1/k6q/2q2q2/3NR3/1P1qr1Q1/1NqPqNq1/1qnbnrbq/1QBKQBQ1 b - -
1qbkqbq1/1QNBNRBQ/1nQpQnQ1/1p1QR1q1/3nr3/2Q2Q2/K6Q/1r4r1 w - -
1qbqkbq1/QBRNBN2/1QnQpQnQ/1q1RQ1p1/3rn3/2Q2Q2/Q6K/1r4r1 w - -
3NQ3/2Pqq2R/1Brk1qP1/Rr2b1qQ/KnPqBqN1/QN1q1Q2/P2p4/3nbb2 w - -
3k4/3b4/2QPQP2/rbQnpQpq/rbQqqQqq/2RRBB2/n1NQ4/2NKn3 b - -
3k4/3b4/2QPQP2/rbQnpQpq/rbQqqQqq/2RRBB2/2NQ4/1nNKn3 b - -
3Nkn2/4qn1N/2bbrr2/QQqQQqBR/QPqPNqBR/2pqpq2/4B3/4K3 w - -
4k3/4b3/2PQPQ2/qpQpnQbr/qqQqqQbr/2BBRR2/4QN2/3nKNn1 b - -
1b2rQbk/P1qQ3N/Q4qB1/1qrnP1p1/2R1Q2q/5QB1/1qQKn1Nq/8 b - -
1qkrr3/Rn2q3/PRPBqQ2/nqpbq3/NQ2Nb2/1Q2Qq1B/1Q2Qq2/1K2Qq2 w - -
2BBN3/4P2p/2q1Q1nq/1nQbQpNk/qQ1B2Rr/1pQ1KRb1/2rQQp2/3qn3 b - -
3rrkq1/2Bq2nR/2QqBPRP/3qbpqn/2bN2QN/2qQ2Q1/2qQ2Q1/2qQ2K1 w - -
1k2qQ2/1q2qQ2/1q2qQ1b/nq2nB2/NQPBQ3/prpbQq2/rN2Q3/1QKRR3 b - -
1k2qQ2/1q2qQ2/1q2qQ2/nq2nB2/NQPBQ3/prpbQq2/rN2Q3/1QKRR1b1 b - -
1k2qQ2/1q2qQ2/1q2qQ2/nq2nB2/NQPBQ3/prpbQq2/rN2Qb2/1QKRR3 b - -
2R2R2/2Q2Q2/q1Q2Q1q/q1R2R1q/r1B2B1q/q1NQQN1q/q6q/kbnKQnbq w - -
3NBB2/p2P4/qn1Q1q2/kNpQbQn1/rR2B1Qq/1bRK1Qp1/2pQQr2/3nq3 b - -
3NQ3/2PqqR2/1Brk1qP1/Rr2b1qQ/KnPqBqN1/QN1q1Q2/P2p4/3nbb2 w - -
3NQQRN/7K/pnqrqb1B/5r1p/5q1k/pbqqpn1B/7Q/3QRQQQ b - -
3QN3/R2qqP2/1Pq1krB1/Qq1b2rR/1NqBqPnK/2Q1q1NQ/4p2P/2bbn3 w - -
3rrkq1/3q2nR/2QqBPRP/2Bqbpqn/2bN2QN/2qQ2Q1/2qQ2Q1/2qQ2K1 w - -
3rrkq1/3q2nR/2QqBPRP/3qbpqn/2bN2QN/B1qQ2Q1/2qQ2Q1/2qQ2K1 w - -
8/Qn1NkqQ1/1bq5/Q2q1r2/1P1pNR2/1bQ4q/n3qQQp/KBqR2B1 w - -
QBNqkNBK/Q6Q/Q1nqqn1Q/Q1b2b1R/Q1r2r1Q/Q1q2q1Q/2q2q2/2r2r2 b - -
Solution for the first problem:
1R1n1K2/krbb1P1P/3n1Q1R/3r1Q1Q/1R3B1q/1NNQPB1q/7q/qqqqq2q w - - acd 24; acs 542; bm Qfxd5; ce 32750; dm 9; pm Qfxd5; pv Qfxd5 Bc6 Qxc6 Nxc6 R4xb7+ Nxb7 Rxb7+ Ka8 Rb8+ Kxb8 Qdb5+ Ka7 Qb7+ Kxb7 Qxc6+ Kb8 Qxc7+;

Dann Corbit
Posts: 10107
Joined: Wed Mar 08, 2006 7:57 pm
Location: Redmond, WA USA
Contact:

Re: Remember Leonid Liberman (author of LLCHESS)?

Post by Dann Corbit » Sat May 23, 2015 3:12 am

These 4 positions may be in error:
2BBN3/4P2p/2q1Q1nq/1nQbQpNk/qQ1B2Rr/1pQ1KRb1/3QQp2/1r1qn3 b - -
3NBB2/p2P4/qn1Q1q2/kNpQbQn1/rR2B1Qq/1bRK1Qp1/2pQQ3/3nq1r1 b - -
1R1QN3/3qqP2/1Pq1krB1/Qq1b2rR/1NqBqPnK/2Q1q1NQ/4p2P/2bbn3 w - -
3NQ1R1/2Pqq3/1Brk1qP1/Rr2b1qQ/KnPqBqN1/QN1q1Q2/P2p4/3nbb2 w - -

Gerd Isenberg
Posts: 2127
Joined: Wed Mar 08, 2006 7:47 pm
Location: Hattingen, Germany

Re: Remember Leonid Liberman (author of LLCHESS)?

Post by Gerd Isenberg » Sat May 23, 2015 6:51 am

Thanks Dann,

I was aware of Leonid's positions, but not that he was Leonid Liberman and that he was author of a chess program LL Chess.

http://www.theparticle.com/chess.html

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