Author: Paul
Date: 15:17:43 04/17/01
Go up one level in this thread
On April 17, 2001 at 17:46:51, Heiner Marxen wrote: >[D]R3Q3/5bPq/1rR5/2p2rnk/1Q3B2/4Nn2/1PBb1NQ1/2K5 w - - >and Chest does not find a mate in 5, here. Here is its refutation table: >refu 1: Qxd2 Rxc6 [ 4-] >solu 1: Bxe8 [ 1+] >solu 2: Nxd2 [ 1+] >solu 11: Nd4 [ 1+] >solu 12: Ne5 [ 2+] >solu 13: Ne1 [ 1+] >solu 14: Ng1 [ 1+] >solu 15: Qxg7 [ 1+] >solu 16: Ra6 [ 1+] >refu 2: Kd1 Rxc6 [ 4-] >solu 3: Bxe8 [ 1+] >solu 4: cxb4 [ 1+] >solu 5: Bxb4 [ 1+] >solu 6: Rxb4 [ 1+] >solu 17: Ne4 [ 1+] >solu 18: Rd5 [ 1+] >solu 19: Nh3 [ 1+] >solu 20: Ra6 [ 1+] >refu 3: Kb1 Rxc6 [ 4-] >solu 7: Bxe8 [ 1+] >solu 8: cxb4 [ 1+] >solu 9: Bxb4 [ 1+] >solu 10: Rxb4 [ 1+] >solu 21: Ne4 [ 1+] >solu 22: Ra6 [ 1+] >solu 23: Qxg7 [ 1+] > >Hope this helps you to pin this down further. > >If you still find a short enough mate, here, please post it, and I will >answer with the variant Chest uses to refute it. In the end we will see >who errs, when the mates become short enough that we poor humans see it >ourselves. > >Heiner Excuse me if I mingle into this conversation, but this is a point where Pretz also goes wrong. After Qxd2, it thinks that Rxf4 is the best defense, thereby overlooking Rxc6: Qxd2 Rxf4 Qxf7+ Nxf7 Bg6+ Qxg6 Qxg6+ Kh4 Ng2# With hashtables switched off it does find Rxc6: Qxd2 Rxc6 Qg4+ Kg6 Qxf5+ Kh5 Qexf7+ Rg6 Qg4+ Kh6 Nf5# Now, what to do next? Any hints Heiner, Tim? :) Paul
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