Computer Chess Club Archives

Search

Messages

Subject: Re: Recapture Extension

Author: Ernst A. Heinz

Date: 14:13:08 03/28/00

Go up one level in this thread

Hi Peter,

>[D]3qkbr1/1b1n1p1p/4pp2/rB6/P2p1B2/5N2/1P3PPP/R2Q1RK1 b - -

Your node explosion might just be an artifact of "LambChop"
for this special position. Things like this simply happen
(e.g. because of slightly unstable evaluation scores causing
unfortunate researches at interior nodes).

"DarkThought WCCC'99" does unlimited recapture extensions
(in Hitech style, i.e., capture bringing score close back to
root value) with a full ply increase. Yet, its effective
branching factor remains smaller than 2.5 in iteration #12.

00:03:08 11.01 e5 Bg3 Be7 Nh4 Ba6 Bxa6 Rxa6 Qd3 Rb6 Qxh7 =-0.88 #61077398
00:07:22 12.01 e5 Bg3 Be7 Nh4 Ba6 Bxa6 Rxa6 Qd3 Nc5 Qxh7 =-0.95 #142815058

That's why I like to speak of "scalable search" in connection
with "DarkThought" ... :-)

=Ernst=

P.S.
WWW pages of "DarkThought" at URL
http://supertech.lcs.mit.edu/~heinz/dt/.

• Re: Recapture Extension Peter McKenzie 00:45:16 03/29/00
  • Re: Recapture Extension Ernst A. Heinz 08:05:42 03/30/00
• Re: Recapture Extension [Anyone actually compute the answer?] Dann Corbit 14:40:49 03/28/00
  • Re: Recapture Extension [Anyone actually compute the answer?] Daniel Clausen 23:54:48 03/28/00

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.