Author: Martin Slowik
Date: 00:21:41 04/06/05
Hi all, some as I find nice problems (the beauty of course depends also on your taste...;) for you and/or your beeping chess partner. Unless otherwise stated all times given refer to the corresponding mate level. On these levels the evaluation function usually is simplified and the selectivity at a minimum. So in some cases the infinite level can lead to shorter solving times, however then it's also possible that a mate cannot be found in the given number of moves. On the mate level the shortest possible mate will be found (if you're patient enough...). Solving Regards, Martin Mate in 1 [d]rQ3Kbr/2pp2P1/3n3P/2N2Pn1/2P1p1qb/4N3/4RRP1/k7 w - - 0 1 ================================================================ Mate in 2 [d]3R1n2/1Q1r4/p2Nb3/2p3N1/2Pk1PP1/1p1P1prp/4pn1P/2K1B1b1 w - - 0 1 Mephisto B&P: <1s. ================================================================ The next one is a special creation by Sam Loyd for the participants of the international tournament in New York, 1893. The young Emanuel Lasker won all(!) 13 games and was ahead by 4.5 pts over the second. Of course the last little hurdle wasn't a big problem too. Again Lasker managed this unusual task for a tournament player in the shortest time of all participants. It's reported that he presented the solution after 35 minutes. He needed five minutes less than Pillsbury. One problem here (for a human) is also the amount of possible black moves and the different white responses. The longer mates below are usually easier for humans and more difficult for the computers. Mate in 3 [d]bKN5/B7/pPP1R1n1/Q4p2/2k5/2p3p1/3p1R2/nr1N3B w - - 0 1 Mephisto B&P: 29s, Mephisto Amsterdam 68000: 17s. ================================================================ Mate in 4 [d]3K4/8/2ppp3/2pkp3/2ppp3/8/4P3/3Q4 w - - 0 1 Mephisto Academy: 51s, Mephisto B&P: 18s, Mephisto Amsterdam: 15s, Mephisto London 68020: 2s. ================================================================ Mate in 5 [d]3r3k/R4P1p/3p1K1N/4P3/8/1qp3R1/8/8 w - - 0 1 Mephisto B&P: 16m 30s, Mephisto Amsterdam 68000: 15m 50s, Mephisto Academy: 9m 44s, Novag Diablo 68000: 6m 14s, Mephisto London: 68020: 2m 59s, Tasc R30 v2.5: 14s. ================================================================ Mate in 6 [d]k7/Pp6/1p6/1p3B2/1p3K2/1p6/8/R7 w - - 0 1 Mephisto Amsterdam 68000: 1h 12m 46s, Mephisto B&P: 50m 14s, Novag Diablo 68000: 37m 58s (11.732kN), Mephsito London 68020: 5m 41s, Fidelity A/G 68060 (V11): (18s on inf lev), Tasc R30 v2.5: 2m 58s (34s on inf level). ================================================================ Mate in 7 [d]3B4/7p/p6P/p5p1/7k/8/P5P1/K2B3N w - - 0 1 Fidelity A/G 68060 (V11): 1h 15m (inf level) Tasc R30 v2.5: 1h 15m 49s, Mephisto London 68020: 1h 06m.
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