Author: Uri Blass
Date: 11:55:22 02/07/01
Go up one level in this thread
On February 07, 2001 at 14:12:34, Heiner Marxen wrote: >Finally, after nearly 11 days Chest completed the mate in 17 miniature, >as posted by José Antônio Fabiano Mendes on January 26, 2001 at 06:55:42. >(K7/600, 350MB hash) >[D]8/p7/8/2p5/p3Q3/K7/2r5/1k6 w - - > >Chest finds two solutions: Qe1+ and Qh1+. >The second key move spans a much smaller tree than the first: 60 lines >versus over 2 million lines (ouch). I have not yet analysed why it grew >sooo huge. Here are the PVs: > > 1.Qe1+ Rc1 Qe5 Rc2 I guess that the tree is huge because of the possible move 2...Kc2 3.Qe2+ Kc3 4.Qb2+ instead of 2...Rc2. I guess that chest found that 4.Qb2+ is enough for mate in 14 but I am not sure about it. Chess playing programs like the line 1.Qe1+ Rc1 2.Qd2 Rc2 3.Qd1+ Rc1 4.Qd3+ Rc2 5.Qf1+ Rc1 6.Qb5+ Kc2 7.Qe2+ Kc3 8.Qb2+ when white get the same positionas after 4.Qb2+ in the above line. 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.