Author: F. Huber
Date: 14:19:38 03/21/04
Go up one level in this thread
On March 21, 2004 at 10:18:34, Anthony Cozzie wrote: >On March 21, 2004 at 08:39:38, Rex wrote: > >>Not sure how programs see this...but how soon does your favorite find the mate? >> >>[D]r4rk1/p2nqppp/2p2n2/3p4/pP3P2/2Pp1b2/P2N1KPP/R1B3QR b - - 1 1 > >1... Qe7-e2 2. Kf2-g3 Bf3xg2 3. Qg1xg2 Nf6-h5 4. Kg3-h3 Nh5xf4 5. Kh3-g3 Qe2xg2 >6. Kg3xf4 Ra8-e8 7. Rh1-e1 g7-g5 8. Kf4-f5 Re8xe1 9. Nd2-f3 f7-f6 10. Nf3xe1 >Qg2-h3 > = MAT10 Depth: 10/25 00:01:40.23 80602kN > >anthony Hi Anthony, congratulation for your engine - it´s mate in 10 is really impressing. Since I first couldn´t believe it, I tried to refute this main line, and let Chest find the optimum defense after your 2nd move Bxg2 - but what a surprise: Chest even found a still _shorter_ mate! After 1... Qe2+ 2.Kg3 Bxg2: ChestUCI Ver.3.3 UCI: CPU: Celeron 400MHz FEN: r4rk1/p2n1ppp/2p2n2/3p4/pP3P2/2Pp2K1/P2Nq1bP/R1B3QR w - - Search for Mate in -10 ... (Hash=64MB) Search completed ... (Time=898.80s) Mate in -7 found ! (14:58) Kg3-h4 --> 3... Qg4# Qg1-f2 --> 3... Qg4# 2 Solutions (Mate in -1) Nd2-f1 --> 3... Qf3+ 4.Kh4 Qg4# Nd2-f3 --> 3... Qxf3+ 4.Kh4 Qg4# Nd2-e4 --> 3... Qf3+ 4.Kh4 Qg4# Nd2-c4 --> 3... Qf3+ 4.Kh4 Qg4# Nd2-b1 --> 3... Qf3+ 4.Kh4 Qg4# Nd2-b3 --> 3... Qf3+ 4.Kh4 Qg4# 6 Solutions (Mate in -2) Ph2-h4 --> 3... Nh5+ 4.Kh2 Bf1+ 5.Qf2 Qxf2# Ph2-h4 --> 3... Ne4+ 4.Kh2 Bf1+ 5.Qf2 Qxf2# 2 Solutions (Mate in -3) Qg1-b6 --> 3... Ne4+ 4.Kh4 Ne5 5.Nf3 Qxf3 6.Ba3 Ng6# Qg1-d1 --> 3... Nh5+ 4.Kh4 Qf2+ 5.Kg4 Ndf6+ 6.Kf5 Qxf4# Ra1-b1 --> 3... Ne4+ 4.Kh4 Ndf6 5.Nf3 Qxf3 6.Ba3 Qg4# Bc1-a3 --> 3... Ne4+ 4.Kh4 Ndf6 5.Nf3 Qxf3 6.Bb2 Qg4# Bc1-b2 --> 3... Ne4+ 4.Kh4 Ndf6 5.Nf3 Qxf3 6.Ba3 Qg4# Pa2-a3 --> 3... Ne4+ 4.Kh4 Ndf6 5.Nf3 Qxf3 6.Bb2 Qg4# Pb4-b5 --> 3... Ne4+ 4.Kh4 Ndf6 5.Nf3 Qxf3 6.Ba3 Qg4# Pc3-c4 --> 3... Ne4+ 4.Kh4 Ndf6 5.Nf3 Qxf3 6.Ba3 Qg4# 8 Solutions (Mate in -4) Qg1xa7 --> 3... Nh5+ 4.Kh4 Qe7+ 5.Kg4 f5+ 6.Kxh5 g6+ 7.Kh6 Qh4# Qg1xa7 --> 3... Ne4+ 4.Kh4 Ne5 5.Nf3 Nxf3+ 6.Kg4 h5+ 7.Kf5 g6# Qg1-c5 --> 3... Nxc5 4.Rf1 Nce4+ 5.Nxe4 Qg4+ 6.Kf2 Qf3+ 7.Ke1 Qe2# Qg1-c5 --> 3... Ne4+ 4.Kh4 Ne5 5.Nf3 Nxf3+ 6.Kg4 h5+ 7.Kf5 g6# Qg1-e3 --> 3... Nh5+ 4.Kh4 Qxe3 5.Nf3 Qxf3 6.Ba3 Qh3+ 7.Kg5 h6# Pf4-f5 --> 3... Ne4+ 4.Nxe4 Qf3+ 5.Kh4 Qh3+ 6.Kg5 h6+ 7.Kf4 Qf3# 6 Solutions (Mate in -5) Qg1-d4 --> 3... Nh5+ 4.Kh4 Qe7+ 5.Kxh5 f5 6.Qxd5+ Bxd5 7.Rg1 Bf7+ 8.Rg6 hxg6# Qg1-f1 --> 3... Bxf1 4.Rxf1 Qg4+ 5.Kf2 Rfe8 6.Ne4 Nxe4+ 7.Ke3 Nec5+ 8.Kd2 Qe2# Ph2-h3 --> 3... Nh5+ 4.Kh4 Qe7+ 5.Kxh5 Nf6+ 6.Kg5 Ne4+ 7.Kg4 f5+ 8.Kh5 Ng3# 3 Solutions (Mate in -6) Qg1xg2 --> 3... Nh5+ 4.Kh3 Nxf4+ 5.Kg3 Qxg2+ 6.Kxf4 Rfe8 7.Re1 Rxe1 8.Ba3 g5+ 9.Kf5 Re5# Qg1-e1 --> 3... Ne4+ 4.Kh4 Ne5 5.Qg3 g6 6.Qg5 Nxg5 7.Kg3 Ne4+ 8.Nxe4 Qf3+ 9.Kh4 Qg4# 2 Solutions (Mate in -7) So it´s at least a mate in 9 with the following 2 possible PVs: 1... Qe2+ 2.Kg3 Bxg2 3.Qxg2 Nh5+ 4.Kh3 Nxf4+ 5.Kg3 Qxg2+ 6.Kxf4 Rfe8 7.Re1 Rxe1 8.Ba3 g5+ 9.Kf5 Re5# 1... Qe2+ 2.Kg3 Bxg2 Qe1 Ne4+ 4.Kh4 Ne5 5.Qg3 g6 6.Qg5 Nxg5 7.Kg3 Ne4+ 8.Nxe4 Qf3+ 9.Kh4 Qg4# Best regards, Franz.
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