Author: Will Singleton
Date: 14:51:47 03/16/99
Go up one level in this thread
On March 16, 1999 at 17:09:43, Andrew Williams wrote: >On March 16, 1999 at 13:39:12, Will Singleton wrote: > >> >>On March 16, 1999 at 02:44:55, Bruce Moreland wrote: >> >>> >>>On March 16, 1999 at 01:09:52, Steffen Jakob wrote: >>> >>>>On March 15, 1999 at 17:40:38, Will Singleton wrote: >>>> >>>>[...] >>>> >>>>>u2600 Position of the Week >>>>> >>>>>The following position is from the game PostModernist - Amateur, played this >>>>>week on fics or ICC. PM makes an interesting move, Bf5, which appears >>>>>pretty speculative, but seems to me to be the best move. No program I have >>>>>tested will play it. Question -- is it the best move, and if so, how did >>>>>PM come to play it? >>>>> >>>>>2r1k2r/1pq3p1/p1n1ppP1/3p3n/3P4/1QNBP2P/PP4Pb/R3BR1K w k - >>>> >>>>Hossa likes e4 in this position: >>> >>>Mine also wants to play e4 but Bf5 might be even nastier, it's hard to tell. >>>Not a position you want to play with black, regardless. >>> >>>bruce >> >>I thought Bf5 was the bolder move, really dominates the board and anticipates >>recovering the bishop on h2, or better. My eval after Bf5 exf5 Nxd5 Qd6 Rxf5 is >>greater than 2 (after a 9 ply search from that position). Several moves would >>probably win, but I liked the style of Bf5. >> > >Hi Will, > >This is PostModernist's log file output at the time - as you can see, it >saw the move after 9 seconds, but this is with the benefit of the TT being >already stuffed. > >I've changed the eval somewhat since, but it still likes Bf5 at about depth >8 (11 secs). > >I also searched to d9 after the line you mention, and I get -2.9 for Black. > > > >Andrew Williams > > >--- Pondering (GWT=0), assuming move: f6 --- > 2= 128 0 47 Na4 Ng3 Bxg3 Bxg3 Nc5 Nd8 Rac1 > 3= 128 0 137 Na4 Ng3 Bxg3 Bxg3 Nc5 Nd8 Rac1 > 4= 128 0 227 Na4 Ng3 Bxg3 Bxg3 Nc5 Nd8 Rac1 > 5= 128 0 317 Na4 Ng3 Bxg3 Bxg3 Nc5 Nd8 Rac1 > 6= 128 0 407 Na4 Ng3 Bxg3 Bxg3 Nc5 Nd8 Rac1 > 7= 137 3 125628 Na4 Bg3 Nb6 Rb8 Bc3 Qd6 > 8b 158 9 431077 Bf5 exf5 Nxd5 Qb8 Nb6 Rd8 Qf7 > 8= 177 11 527141 Bf5 exf5 Nxd5 Qd6 Qxb7 Rb8 >--- Pondering finished --- > >time 68000 >otim 64400 > >f7f6 > >PONDERING MOVE RIGHT > 2= 150 15 719124 Bf5 exf5 Nxd5 Qd6 Qxb7 Rb8 > 3= 151 15 719227 Bf5 exf5 Nxd5 Qd6 Qxb7 Rb8 > 4= 152 15 720429 Bf5 exf5 Nxd5 Qd6 Qxb7 Rb8 > 5= 152 15 722614 Bf5 exf5 Nxd5 Qd6 Qxb7 Rb8 > 6= 155 16 733703 Bf5 exf5 Nxd5 Qd6 Qxb7 Rb8 > 7= 150 16 766337 Bf5 exf5 Nxd5 Qd6 Qxb7 Rb8 > 8= 156 18 864018 Bf5 exf5 Nxd5 Qd6 Qxb7 Rb8 >NODES PER SECOND 45500 Andrew, What eval terms do you think are most responsible for choosing Bf5? I notice you handle pondering differently than I. If my guess is correct, I just continue the search at that point. You restart. Any reason to restart the search? Will
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.