Author: Michael Henderson
Date: 11:31:28 09/04/04
Go up one level in this thread
On September 04, 2004 at 14:22:13, Michael Henderson wrote: >On September 04, 2004 at 12:51:30, David Dahlem wrote: > >>On September 04, 2004 at 12:39:11, David Dahlem wrote: >> >>>On September 04, 2004 at 11:46:48, Ed Schröder wrote: >>> >>>>Does someone possess a good test set for testing Perpetual Checks ? >>>> >>>>Thanks. >>>> >>>>Ed >>> >>>Another position from the archives: >>> >>>[D]3r4/5k2/5p2/6pp/5p2/1p6/p2R4/K3R3 b - - 0 1 >>> >>>There is perpetual check and stalemate if black plays ...Rxd2. Many programs >>>probably find the perpetual coming, but at what time do your favorite programs >>>give a 0.0 or near 0.0 score? This position is actually not a draw but a win by >>>black. >>> >>>Regards >>>Dave >> >>ProDeo UCI UCI1: >> 1 00:00 -11.06 1. ... Rxd2 >> 2 00:00 -10.82 1. ... Rxd2 2.Rh1 >> 3 00:00 -11.24 1. ... Rxd2 2.Rh1 h4 >> 4 00:00 -11.20 1. ... Rxd2 2.Rh1 f5 3.Rf1 >> 5 00:00 -11.55 1. ... Rxd2 2.Rh1 f5 3.Rf1 h4 >> 6 00:00 -11.09 1. ... Rxd2 2.Re7+ Kf8 3.Re1 f5 4.Rf1 >> 7 00:00 -11.19 1. ... Rxd2 2.Re7+ Kf8 3.Re8+ Kg7 4.Re1 f5 5.Rf1 >> 8 00:00 -9.14 1. ... Rxd2 2.Re7+ Kf8 3.Re8+ Kg7 4.Re7+ Kh8 5.Re8+ Kh7 >>6.Re7+ Kg6 7.Rg7+ Kf5 8.Rxg5+ Ke4 9.Rg1 f3 10.Re1+ Kf4 >> 9 00:00 -8.66 1. ... Rxd2 2.Re7+ Kg6 3.Rg7+ Kf5 4.Rxg5+ Ke6 5.Re5+ Kd6 >>6.Re6+ Kc5 7.Re5+ Kc6 >>10 00:00 -7.04 1. ... Rxd2 2.Re7+ Kg6 3.Rg7+ Kf5 4.Rxg5+ Ke6 5.Re5+ Kd6 >>6.Re6+ Kc7 7.Re7+ Rd7 8.Re1 Kd6 9.Re2 Ra7 10.Rd2+ Ke5 >>11 00:00 -7.04 1. ... Rxd2 2.Re7+ Kg6 3.Rg7+ Kf5 4.Rxg5+ Ke6 5.Re5+ Kd6 >>6.Re6+ Kc5 7.Rc6+ Kd4 8.Rd6+ Ke3 9.Re6+ Kd3 10.Rd6+ Ke2 11.Re6+ Kf1 12.Rxf6 Rd1+ >>12 00:01 -7.44 1. ... Rxd2 2.Re7+ Kg6 3.Rg7+ Kf5 4.Rxg5+ Ke6 5.Re5+ Kd6 >>6.Re6+ Kd7 7.Re7+ Kc8 8.Re8+ Rd8 9.Re1 h4 10.Kb2 Rd3 11.Rc1+ Kb7 12.Rc5 >>13 00:03 -5.00 1. ... Rxd2 2.Re7+ Kg6 3.Rg7+ Kf5 4.Rxg5+ Ke6 5.Re5+ Kd6 >>6.Re6+ Kc5 7.Rc6+ Kd4 8.Rd6+ Ke3 9.Re6+ Kd3 10.Rd6+ Ke2 11.Re6+ Kd3 12.Rd6+ Ke2 >>13.Re6+ >>14 00:14 -4.76 1. ... Rxd2 2.Re7+ Kg6 3.Rg7+ Kf5 4.Rxg5+ Ke6 5.Re5+ Kd6 >>6.Re6+ Kc7 7.Rc6+ Kd7 8.Rc7+ Ke6 9.Re7+ Kf5 10.Re5+ Kg4 11.Rg5+ Kf3 12.Rg3+ Ke4 >>13.Rxb3 >>15 00:42 -4.52 1. ... Rxd2 2.Re7+ Kg6 3.Rg7+ Kf5 4.Rxg5+ Ke6 5.Re5+ Kd6 >>6.Re6+ Kc5 7.Rc6+ Kd4 8.Rd6+ Ke3 9.Re6+ Kd3 10.Re3+ Kc4 11.Rc3+ Kd4 12.Rxb3 Re2 >>13.Rd3+ >>16 02:46 -4.69 1. ... Rxd2 2.Re7+ Kg6 3.Rg7+ Kf5 4.Rxg5+ Ke6 5.Re5+ Kd6 >>6.Re6+ Kc7 7.Rc6+ Kd7 8.Rc7+ Ke6 >> >>Regards >>Dave > >The thing holding up the 0.00 score is the 50 move rule. Black takes the rook >and definitely holds it before the 50 move rule takes effect. You would have to >make some (x < 50) move rule (or some variant on that) to solve this in >reasonable time. but if this is a won position (i didn't see that last time) then it won't work. Why would programs return a draw score if this is a win unless they are doing the above?
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