Author: Alessandro Scotti
Date: 15:49:25 12/17/05
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On December 17, 2005 at 16:37:35, David Dahlem wrote: >Here is a mate in 1 (probably not legal). ChestUCI finds the solution, but other >engines can't seem to find it. :-) This position causes an explotion of quiesce nodes, here's Kiwi with "unlimited" qsearch (some lines omitted): 3/ 3 +0.00 00:22 111 Kh7 Nxd5 dxe4 3/ 3 +1.84 00:50 2303 Kh7 fxg5 dxe4 3/ 3 +2.68 00:55 3790 Nxc6 fxg5 dxe4 3/ 3 +2.92 01:10 4118 Nxc6 fxg5 dxe4 3/ 3 +3.52 01:23 5861 Qd1 exd5 fxe4 3/ 3 +4.60 01:54 7604 Qd1 exd5 fxe4 3/ 3 +4.76 02:04 8300 Nxc4 cxd5 dxe4 3/ 4 +5.84 02:14 9903 Qf1+ Kh2 fxe4 exd5 cxd4 3/ 4 +9.20 03:04 15235 Qf1+ Kh2 Rxd4 fxg5 Qf2+ 3/ 5 +9.28 04:33 22833 dxe4 bxa5 Bxd4 3/ 5 +199.99 04:40 23268 Qh1+ 4/ 0 +199.99 04:40 23313 Qh1+ 5/ 0 +199.99 04:41 30181 Qh1+ So almost 5 minutes to see the mate! But with limited (3*nominal search depth) qsearch: 3/ 3 +0.00 00:00 99 Kh7 Qxd5 Qf1+ 3/ 3 +3.80 00:01 5660 Nxc6 exd5 dxe4 3/ 3 +4.52 00:01 7739 Qd1 exd5 fxe4 3/ 3 +199.99 00:02 9659 Qh1+ 4/ 0 +199.99 00:02 10684 Qh1+ 5/ 0 +199.99 00:02 15983 Qh1+ 6/ 0 +199.99 00:03 68534 Qh1+
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