Author: Mike S.
Date: 13:03:43 09/07/01
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On September 07, 2001 at 14:58:50, Peter McKenzie wrote: >(...) >A good test position will often have several appealing moves that are not >sufficient to win (or hold the draw if that is the task), so it is unlikely the >key will be played if the program doesn't understand it. >Alternatively, the key >may involve a sacrifice of material which no program will do unless it has a >fair idea of what is going on! Thanks for pointing that out. This is really a basic requirement for a reasonable test position - although very difficult to achieve for positional tests. But for the endgame, I think I can provide a few good ones (some may have been included in test suites, which I don't know because there are so many test suites :o). Geller,E - Fischer,R [E80] Capablanca mem (17), 1965 [D]8/8/1P1k2p1/8/5P1p/4Qb2/1q4PK/8 w - - 0 54 54.Qe5+ Troitzky,A - [+0130.11g4f8] [D]5k2/8/8/3R4/6K1/8/3b2pP/8 w - - 0 1 1.Rf5+, not 1.RxB - this one is relatively easy, but involves underpromotion and specific bishops knowledge (1.Rf5+ Ke7 [1...Kg7 2.Kh3 g1R!] 2.Re5+ Kf6 3.Re1 Bxe1 4.Kh3 g1B ½-½). I don't know if you would consider the following an endgame test, or purely tactical: LG2000V3 - Gromit30 [C06] Computer chess game (9), 2000 [D]7k/7p/1p4p1/n2p4/1K1p3R/2NB4/3Q1P2/q1r5 w - - 0 36 36.Rxh7+ White escapes with a perpetual. The game continued 36.Rxh7+!! 36...Kxh7 37.Bxg6+ Kxg6 38.Qd3+ Kg7 39.Qxd4+ Kg6 40.Qg4+ Kf6 41.Qf4+ Ke6 42.Qg4+ Kf7 43.Qf4+ Ke8 44.Qe5+ Kd7 45.Qxd5+ Kc8 46.Qe6+ Kb7 47.Qd7+ Kb8 48.Qe8+ Ka7 49.Nb5+ Kb7 50.Nd6+ Ka7 51.Nb5+ Kb7 52.Nd6+ Ka7 53.Nb5+ Draw ½-½ Regards, M.Scheidl
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