Author: Uri Blass
Date: 05:18:38 02/16/01
Go up one level in this thread
On February 16, 2001 at 06:42:19, leonid wrote: >Hi! > >If you like to relax by solving short and easy mate then this is just for you: > >[D]1qNqkqNq/1r1nbn1r/1QQ1q1QQ/1qn1Q1nq/BQ2b2B/3Q1Q2/4Q3/3RKR2 w - - > >Please, indicate your result. I tried to solve it for a 3 minutes without success . You ask if you like to relax by solving short and easy mate so I assume that it was meant for humans because I do not see how humans can relax from the fact that a chess program can solve it. Junior5.9 found that Qxf8+ is a mate in 7 I used Junior to generate a proof for it and her is the proof 1.Qxf8+ Kxf8[Bxf8 2.Qcxe6+ Ncxe6(2...Qe7 or 2...Be7 3.Qxe7+ and 4.Qxe7#) and after 2...Ngxe6 3.Qxd8#) 3.Qxf8+ Kxf8(Ndxf8 4.Qdxd8#) 4.Qxd8+ Nexd8 5.Qe7#]2.Qxd8+ Bxd8 3.Qbxc5+ Qxc5 4.Qcxc5+ Qed6 5.Qcxd6+ Qxd6(5...Be7 6.Qdxe7#) 6.Qdxd6+ Be7 7.Qexe7# Possible alternatives for black: Alternatives at move 3: 3...Ke8 4.Qcxe6+ Nxe6(or Be7 5.Qexe7#) 5.Qexe6+ Be7 6.Qcxe7# 3...Qed6 4.Qc6xd6+ Qxd6(or Be7 5.Qdxe7#) 5.Qcxd6+ Be7 6.Qexe7# 3...Qbd6 4.Q6xd6+ and now a)Qxd6 5.Qcxd6+ Be7 Qexe7# b)Be7 5.Qxe7+ Qxe7 6.Qexe7# c)Ke8 5.Qf8+ Nxf8 6.Qxd8# d)Qe7 5.Qdxe7+ Bxe7 6.Qexe7# 3...Qe7 4.Qexe7+ Bxe7 5.Qxe7# 3...Nc5 4.Qxd8+ Qe8 5.Qexe8# 3...Be7 4.Qxe7+ Qxe7 5.Qxe7# Alternatives at move 4: 4...Qbd6 5.Qdxd6+ and now a)5...Qxd6 6.Qcxd6+ Be7 7.Qdxe7# b)5...Be7 6.Qxe7+ Qxe7 7.Qcxe7# c)5...Qe7 6.Qdxe7+ Bxe7 7.Qcxe7# d)5...Ke8 6.Qf8# 4...Ke8 5.Qxd7+ Rxd7 6.Bxd7# 4...Nxc5 5.Qxd8+ Qe8 6.Qexe8# 4...Qe7 5.Qcxe7+ Bxe7 6.Qxe7# 4...Be7 5.Qxe7+ Qxe7 6.Qxe7# I think the mate in 50 that somebody else posted is clearly more easy for me. Only writing the solution of this mate took me more than 10 minutes and I am not sure that there are no mistakes(I was too lazy to check it). Uri
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.