Author: Stephen Bigelow
Date: 22:07:38 06/02/00
Go up one level in this thread
On May 31, 2000 at 20:45:04, Dann Corbit wrote: >What are the correct answers for these positions? Are they known? I am giving analysis and general comments about the individual positions below. Anybody out there with HIRACS, Shredder or Junior going to run the tests? I really would like to buy a program that can handle these endgames well, but so far I am unimpressed, although I do find it interesting that Crafty performs better to my eye than Fritz 6. Stephen > What are the correct answers, by the way? > 2b1k2r/R4pbp/2p1p3/1p3PP1/1p2P3/1P6/1PP4P/4KR2 w This is from a Capablanca game: White won with 1.f6 Bf8 2.Ke2 e5 3.Kf3 Bc5 4.Rc7 Bd7 5.Rd1 Bd4 6.c3 bxc3 7.bxc3 Kd8 8.Rxd7+ Kxd7 9.cxd4 exd4 10.e5 c5 11.Ke4 Kc6 12.e6 fxe6 13.Ke5 Kd7 14.b4 Rg8 15.h4 Rc8 16.h5 1-0 > 5k2/p1p4R/1pr5/3p1pP1/P2P1P2/2P2K2/8/8 This is from another Capablanca game: 1.Kg3 Rxc3+ 2.Kh4 Rf3 3.g6 Rxf4+ 4.Kg5 Re4 5.Kf6 Kg8 6.Rg7+ Kh8 7.Rxc7 etc. > 6k1/8/2P5/p6p/5bP1/7P/2B2K2/8 w This is not from a real game and there are no "right" continuations. The test is to see whether the program will play gxh5 after which it is clear that white has no winning chances due to the wrong color Bishop. Correct evaluation here is important to see that h7-h5 for black on the previous move is a drawing resource. > 7k/6p1/2q2p1p/1p4nP/1P6/3QR3/6P1/7K w The key here is to force the Queens off while activating the Rook. 1.Qd8+ Kh7 2.Qe8 Qc2 3.Qg6+ Qxg6 4.hxg6+ Kxg6 5.Re7 > 7r/p3k3/2p5/1pPp4/3P4/PP4P1/3P1PB1/2K5 Chekhover White sets up a fortress which obtains the draw 1.Kd1 Rh2 2.Ke1 Rxg2 3.Kf1 Rh2 4.Kg1 Rh3 5.Kg2 Rh7 6.f3= > 8/5Np1/4kbP1/7p/8/4K3/8/8 w Another hypothetical position without concrete lines. The game is clearly drawn as white can stick his N on h8 and K on h1 and black is powerless to create a zugzwang. > 8/5pk1/p7/8/4Q2P/3p4/5r2/3K4 b Black simply plays 1. .. Re2 2. Qxd3 Re6 and the Queen side pawns are irrelevant as the K-side structure is a book draw. -- Averbakh > 8/8/4k3/6p1/3P1p2/4pK2/p3P3/B7 Again a theoretical position without defined lines. It is easy to see that the game is drawn due to White's K and B both being tied to preventing black's pawns from queening.
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