Author: Chris Welty
Date: 08:14:04 02/22/05
Go up one level in this thread
This is terrific fun for me as a programmer too, the positions are quite varied. It appears that the star diamond always reports mates with one too few moves. I've commented on some of the positions: >r2qk2r/ppp2p1p/3p1np1/2b1P3/2BnP3/2NP3P/PPP3P1/R1BQK2R b KQkq - bm Nh5; I didn't run them very long but my program (and Crafty) think that Nd7 is about as good as Nh5. >Bq1B1K2/3PpN2/P3Pp2/P1p2P2/2Pk1b1R/1p6/pN1P1P2/QR6 w - - id Babson Task mate in >4; bm a7 >3k4/p2p2q1/2rN1n1r/2P5/8/5Q2/PP1K1P1P/4R3 w - - bm Qxf6+;id portables; Mate in 5 >3r3k/p4Qp1/7p/1b1Bp3/4Pp2/7R/4nqPP/4R2K w - - id mate in 10 for portables; bm Rxh6+ >8/5K2/3N3N/8/5k2/7B/5B2/8 w - - id mate in 4, tough for null movers; bm Bg2 >1b6/kPp5/p1P5/R5Rr/P1N1P3/8/6p1/6Kb w - - id mate in 5; > star diamond 8 sec m5 > sapphire2 12 sec m5 bm Rgc5 >4K3/3pPP2/7p/3PB3/6pP/pP6/prP3P1/kb4R1 w - - id mate in 5; bm Bh8 > >2r3k1/1p2q2p/p6Q/3pp1p1/2r1n3/2P2P1R/PP4PP/R5K1 b - - id mate in 5; bm Qc5+ > >r3r3/pp2qpkp/3R3p/2p5/P3p3/1P5P/2PQ1PP1/4R1K1 w - - id mate in 5; I couldn't find this one. What's the line? > >8/8/2K5/p1n1ppp1/1bN3n1/2kr3P/P1N2p2/2Q2B2 w - - id mate in 4; bm Kb5 > >5nR1/r3q3/p6k/1pp2p1P/4pP2/PP2P3/2P1B3/Q5K1 w - - id mate in 4; bm Qh8+ > >7r/7p/7P/8/2Q5/PB2p3/PpN1N3/1k2K3 w - - id mate in 3; bm Qg8 >5Kbk/6pp/6P1/8/8/8/8/7R w - - bm Rh6; > first mate in 2 solved by a computer. MADM in 15 min in 1951; The only known chess problem by Paul Morphy >8/8/8/2ppp3/2pkp3/2ppp3/7K/5N1Q w - - id mate in 4; bm Nd2 > >7k/1p3p2/4pNpB/1b2K3/3p4/8/8/8 w - - id tough mate in 4 for some engines; bm Kd6 > >1kbr3r/pp6/8/P1n2ppq/2N3n1/R3Q1P1/3B1P2/2R2BK1 w - - id easy mate in 11; > star diamond 6:18 m10 > pf2 13 min no solve bm Qf4+ > >1n6/8/8/R3Np1K/1N3k2/1R6/1P5P/3n4 w - - id tough mate in 5 for CM9K; bm Nc4 > >r4rk1/1ppq1pp1/p2bbn1p/nP1pp3/P1P5/3P1NP1/1B1NPPBP/R2Q1RK1 b - - bm dxc4; > longest consecutive captures (17); Neat position. Are you sure dxc4 is best? Crafty liked d4 and my engine prefers axb5 >8/p1p2n1k/1p1b1R1p/1r1q1PPQ/1N1B3K/2P4P/8/8 w - - id mate in 2; bm Rxf7+ > >k1K5/1b6/pP6/8/8/8/R7/8 w - - id zugswang null move mate 3 7/19/99; bm Kc7 > >8/8/6P1/8/8/7n/5k1n/7K b - - id crafty 17.5 prob mate 3 12/23/99; bm Nf3 >1k1r4/pp1b1R2/3q2pp/4p3/2B5/4Q3/PPP2B2/2K5 b - - bm Qd1+;id advances in CC3 #1; mate in 3 >3r1k2/4npp1/1ppr3p/p6P/P2PPPP1/1NR5/5K2/2R5 w - - bm d5;id advances in CC3 #2; my engine and crafty both prefer f5 > >2q1rr1k/3bbnnp/p2p1pp1/2pPp3/PpP1P1P1/1P2BNNP/2BQ1PRK/7R b - - bm f5; > advances in CC3 #3; Crafty going with Rd8 and my engine with Qc7 although neither of them sees much difference between that and f5 >1nk1r1r1/pp2n1pp/4p3/q2pPp1N/b1pP1P2/B1P2R2/2P1B1PP/R2Q2K1 w - - bm Nf6; > advances in CC3 #7; Crafty likes Qc1, mine likes Qb1 >8/8/8/8/8/6P1/6k1/4KR1R w - - id Sam Loyd mate in 3; If white can't castle it's a mate in 4. This should be 8/8/8/8/8/6P1/6k1/4KR1R w K - id Sam Loyd mate in 3; bm Rf4 > >rkB5/ppp4R/3B1P2/3PpK2/8/5Q2/8/8 w - - id mate in 2; mate in 3; bm Qc3 > >5Nk1/5pPp/4PB1p/1KpP2p1/6R1/1B5p/P7/8 w - - id mate in 2; mate in 3; bm Bc2 >4qb1k/2n1r2p/4pp1B/3n3Q/1p1PN3/5PR1/5P1P/6RK b - - id tough mate in 5; > pf1 30 sec m10, 40 sec m7, 50 sec m5 > star diamond 20 sec mated in 5; bm Rg7 > >n1rb4/1p3p1p/1p6/1R5K/8/p3p1PN/1PP1R3/N6k w - - id very tough mate in 5; > pf2 e125 1:30 m5 > mach3 master 15 min bm b4 >r3r1k1/1pp2ppp/p1bp4/8/4nPq1/1Q2BN2/PPP3PP/4RRK1 b - - bm Re6;id for portables; my engine prefers a5 by a small amount. h6 might also be ok. >b7/2brn3/pp3B1k/6R1/P6N/1B5P/5PP1/6K1 w - - bm g4;id for portables mate in 8; > chess tiger on palm 10 sec > mephisto 68030,pf, pocket genius 2 sec > chess tiger14.9a @ 54mhz g4 0 sec, m8 in 7 sec > mate in 7 >Rr6/6k1/2PK1p2/6p1/4p3/4P3/4bP2/R7 w - - bm Rxb8;id tough mate in 9; > atlanta 1:15:00 no solve > fritz2 xp3k 25 sec m12 > yacepdb 43 sec m?, 1:44 m9 > pf2 e125 6 min no solve > >r2qk2r/ppp2p1p/3p1np1/2b1P3/2BnP3/2NP3P/PPP3P1/R1BQK2R b - - bm Nh5; > atlanta 15 sec alternative bm Nd7 >2r1r1k1/2b3p1/pp6/7Q/Pn2N2P/1q6/7P/2B3RK w - - bm Rxg7+;id portables; > mach3 5 min > saitek cougar 7 min mate in 7 found (might be something shorter) >4r1k1/p1qr1p2/2pb1Bp1/1p5p/3P1n1R/1B3P2/PP3PK1/2Q4R w - - bm Qxf4;id mate in 6; > pf2 11:15 m6 > pf1 18:10 m13, 18:47 m7 > atlanta - can't set up since king in check > cm9k piii-600 1 sec m6 > crafty 4:14 m6 from Win At Chess >8/p3q1kp/1p2Pnp1/3pQ3/2pP4/1nP3N1/1B4PP/6K1 w - - bm Ba3; Botvinnik-Capablanca 1938 >8/2pB4/6p1/1PK2pPb/1P3pk1/5N1p/4Q2P/8 w - - id mate in 4; > mscp 14 sec bm Bc8 > >1kB5/p1p5/P1P5/PKp5/P1P5/8/7p/6bR w - - id quick mate in 7 sapphire ii 38 sec >m6; > star diamond 25 sec m5 mate in 7 bm Bb7 >r4rk1/4Rppp/p1P5/1p6/3P1n2/1BP2b2/PP3PpP/RN4K1 w - - id mate in 5; > star diamond 0 sec Bxf7+ no mate Mated in 5 >3k1KRB/3p1PP1/B1pP4/2P5/p7/8/8/8 w - - id mate in 6; bm Bc4 >7K/8/7P/8/k7/3R4/3p2r1/4q3 w - - id mate in 6 > star diamond 7 sec no mate mated in 5. bm Rd4+ >8/1B6/8/5p2/8/8/5Qrq/1K1R2bk w - - bm Qa7;id very very tough mate in 3; > rs2250xl 13 sec m3 > tlcd 10 sec m3 > star diamond 15 sec m2 > chess station 2:03 > pocket fritz2 2:20 m12 5545 nps > pocket fritz 10 min no solve 8700 nps Qxf5 11.96 > super forte 3 sec m2 > >8/3p1p2/5Ppp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - bm Kc3; > id #1097 mate in 4 very-very tough (Double Indian); > novag obsidean mate in 4 level 11 sec > chess station > 30 min no solve King can't move to c3. Found a mate in 26 (Ne3) I imagine there's something better. >5R2/2K5/1pP5/4k2p/3pp3/2p5/B4N1b/n1R1B2b w - - bm Rxc3;id very tough mate in 4 >BB # 1217; mate in 5 >r2b1rk1/2q2p1p/p3b2Q/1pn3B1/4Pp2/P1NB4/1PP3PP/R4R1K w - - id mate in 6; bm Bf6
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