Author: John Merlino
Date: 12:57:30 06/15/04
Go up one level in this thread
On June 15, 2004 at 14:54:01, José Antônio Fabiano Mendes wrote: > Dely vs Hajtun [Hungary, 1954] > [D]b1n1r1k1/2q2p1p/p4Pp1/1pBP4/4B1P1/2P1Q3/P4K1P/4R3 w > 1. Qh6!! Qxc5+ 2. Re3! Qf8 3. Bxg6! Qxh6 4. Rxe8+ Qf8 5. Bxg7+! Kxh7 6. Rxf8 > and White has an easily won ending. "Chess Tactics" [by GM Kotov, 1983] > But is this combination really correct? Maybe 1. Kg2 is the best move here. Qh6 wins easily. Kg2 apparently wins easier. Here is what CM_SKR says on an AMD 2500: Time Depth Score Positions Moves 0:00 1/3 0.08 2240 1.Kf1 Qxh2 2.Qf2 0:00 1/3 0.46 3136 1.Kg2 Bxd5 2.Qh6 0:00 1/4 0.56 7482 1.Kg2 Rxe4 2.Qxe4 Qxc5 3.Qe8+ Qf8 0:00 1/4 2.77 13181 1.Qh6 Qxc5+ 2.Re3 Qf8 3.Bxg6 Qxh6 4.Rxe8+ Qf8 5.Bxh7+ Kxh7 6.Rxf8 0:00 1/5 3.94 26057 1.Qh6 Qxc5+ 2.Re3 Qf8 3.Bxg6 Qxh6 4.Rxe8+ Qf8 5.Bxh7+ Kxh7 6.Rxf8 Nb6 7.Rxf7+ Kg6 0:00 1/6 3.94 64949 1.Qh6 Qxc5+ 2.Re3 Qf8 3.Bxg6 Qxh6 4.Rxe8+ Qf8 5.Bxh7+ Kxh7 6.Rxf8 Nb6 7.Rxf7+ Kg6 0:00 1/7 4.49 132701 1.Qh6 Qxc5+ 2.Re3 Qf8 3.Bxg6 Qxh6 4.Rxe8+ Qf8 5.Bxh7+ Kxh7 6.Rxf8 Nb6 7.Rb8 Nxd5 8.Rxa8 Nxf6 9.Rxa6 Nxg4+ 10.Kg3 0:00 1/8 4.36 324164 1.Qh6 Qxc5+ 2.Re3 Qf8 3.Bxg6 Qxh6 4.Rxe8+ Qf8 5.Bxh7+ Kxh7 6.Rxf8 Bxd5 7.Rxc8 Bxa2 8.Ra8 0:01 1/8 5.50 477888 1.Kg2 Qd8 2.Qh6 Qxf6 3.Bd4 Qxd4 4.cxd4 Bxd5 5.Kf3 Bxa2 6.Qd2 0:02 1/9 6.94 980829 1.Kg2 Qd8 2.Qh6 Qxf6 3.Bf3 Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Nxd5 7.Qg5 0:07 1/10 7.55 2425648 1.Kg2 Qd8 2.Qh6 Qxf6 3.Bf3 Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Bxd5 7.Bxd5 Nxd5 8.Qg5 Nc3 9.Qd8+ Kg7 0:16 1/11 7.61 5684150 1.Kg2 Qd8 2.Qh6 Qxf6 3.Bf3 Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Bxd5 7.Qg5 Bxf3+ 8.Kxf3 Nc6 9.Ke4 0:41 1/12 8.03 14818166 1.Kg2 Qd8 2.Qh6 Qxf6 3.Bf3 Re7 4.Re3 Nd6 5.g5 Qxf3+ 6.Rxf3 Rd7 7.Rd3 Bb7 8.Bxd6 Rxd6 2:00 2/13 8.07 42789860 1.Kg2 Qd8 2.Qh6 Qxf6 3.Bf3 Rd8 4.Bd4 Qxd4 5.cxd4 Nb6 6.d6 Bxf3+ 7.Kxf3 Rc8 8.Qg5 h5 9.gxh5 After forcing your line (plus 6...Bxd5 7.Rxc8), The King says: Time Depth Score Positions Moves 0:00 1/3 4.29 406 7...Bxa2 8.Ra8 Be6 9.h4 Bxg4 10.Rxa6 0:00 1/4 4.29 921 7...Bxa2 8.Ra8 Be6 9.h4 Bxg4 10.Rxa6 0:00 1/5 5.79 2271 7...Bxa2 8.Ra8 Be6 9.g5 Kg6 10.Rxa6 0:00 1/5 4.47 4555 7...Kg6 8.a3 Kxf6 9.h4 Ke5 10.h5 0:00 1/6 4.43 11475 7...Kg6 8.a3 Kxf6 9.h4 Be6 10.Rg8 Ke5 0:00 1/7 4.48 27729 7...Kg6 8.a3 Kxf6 9.h4 Be6 10.Rg8 Ke5 11.Ke3 0:00 1/8 4.56 64997 7...Kg6 8.a3 Kxf6 9.h4 Bb7 10.Rb8 Bc6 11.Ke3 Ke5 0:00 2/9 4.59 124631 7...Kg6 8.a3 Kxf6 9.h4 Ke5 10.h5 Be6 11.Re8 f6 12.Ke3 0:00 3/10 4.69 244163 7...Kg6 8.a3 Kxf6 9.h4 Kg6 10.h5+ Kh6 11.Kg3 f6 12.Kf4 Be6 13.Rf8 0:01 4/11 4.89 553570 7...Kg6 8.a3 Kxf6 9.Rb8 Ke5 10.Kg3 Ke4 11.Rb6 Kd3 12.Rxa6 Kxc3 13.h4 0:04 5/12 4.83 1371626 7...Kg6 8.a3 Kxf6 9.Rb8 Ke5 10.Kg3 Ke4 11.h4 Kd3 12.Rd8 Ke4 13.h5 0:08 6/13 5.19 2876545 7...Kg6 8.a3 Kxf6 9.Rb8 Be6 10.Kg3 Ke5 11.Ra8 f5 12.gxf5 Bxf5 13.Rxa6 Bd3 14.h4 0:20 7/14 5.34 7167640 7...Kg6 8.a3 Kxf6 9.h4 Ke5 10.Kg3 f5 11.Re8+ Be6 12.gxf5 Kxf5 13.Ra8 Ke5 14.Rxa6 Bc4 15.Rc6 Bd5 0:49 8/15 5.42 17653134 7...Kg6 8.a3 Kxf6 9.h4 Ke5 10.Kg3 f5 11.Re8+ Be6 12.gxf5 Kxf5 13.Ra8 Bf7 14.Rxa6 Ke5 15.Rb6 Bc4 16.h5 2:07 9/16 5.53 46277074 7...Kg6 8.a3 Kxf6 9.h4 Ke5 10.Kg3 Ke6 11.Rb8 Ke5 12.Rb6 f5 13.gxf5 Kxf5 14.h5 Be4 15.Rxa6 Ke5 16.h6 But after forcing (from the initial position) 1.Kg2 Qd8 (or Qe5) 2.Qh6 Qxf6 3.Bf3, The King says: Time Depth Score Positions Moves 0:00 1/3 6.54 1729 3...Ne7 4.Bd4 Qxf3+ 5.Kxf3 Bxd5+ 6.Kf2 0:00 1/3 2.84 3620 3...Qd8 4.Bd4 f6 5.Bxf6 0:00 1/4 3.26 6686 3...Qd8 4.Bd4 f6 5.Bxf6 Re2+ 6.Rxe2 Qxf6 0:00 1/5 7.89 18428 3...Qd8 4.Bd4 Re5 5.Bxe5 Qf8 6.Qxf8+ Kxf8 7.g5 Nb6 8.Rd1 0:00 1/5 5.55 22888 3...Re7 4.g5 Qxc3 5.Bxe7 Nxe7 6.Rxe7 Qd2+ 7.Kh3 0:00 1/6 6.86 54443 3...Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Nxd5 7.Qg5 0:00 1/7 7.45 73573 3...Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Bxd5 7.Bxd5 Nxd5 8.Qg5 Nc3 9.Qd8+ Kg7 0:00 1/8 7.51 123259 3...Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Bxd5 7.Qg5 Bxf3+ 8.Kxf3 Nc6 9.Ke4 0:01 1/9 7.52 442402 3...Re7 4.Re3 Qg7 5.Qxg7+ Kxg7 6.Bxe7 Nb6 7.Rd3 f5 8.Kg3 Nc4 9.Kf4 0:02 1/10 7.57 961770 3...Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Nxd5 7.Qc1 Kg7 8.Qc8 Nf4+ 9.Kg3 Bxf3 10.Kxf3 0:04 1/11 8.14 1649663 3...Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Nxd5 7.Kh1 f6 8.Qc1 Kf7 9.Qc8 Nb6 10.Qc7+ Kg8 11.Bxa8 Nxa8 0:11 1/12 8.63 3974096 3...Re7 4.Rxe7 Nxe7 5.Bd4 Qxd4 6.cxd4 Bxd5 7.Qg5 Bxf3+ 8.Kxf3 Kf8 9.Qf6 a5 10.Qh8+ Ng8 11.g5 h5 12.gxh6ep 0:17 1/12 8.22 5999770 3...Rd8 4.Bd4 Qxd4 5.cxd4 Nb6 6.Qg5 Rf8 7.Re7 a5 8.Kg1 h6 9.Qxh6 Nxd5 10.Rd7 0:30 2/13 8.77 10735690 3...Rd8 4.Bd4 Qxd4 5.cxd4 Nd6 6.Qg5 Rd7 7.Re7 Rd8 8.Ra7 Rf8 9.Qf6 Nc4 10.Qxa6 So, Kg2 is better, but Qh6 is prettier. :-) jm
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