Author: Bruce Moreland
Date: 15:44:37 01/13/00
Go up one level in this thread
On January 13, 2000 at 01:11:19, Jeremiah Penery wrote: >On January 12, 2000 at 04:27:46, Shep wrote: > >>On January 11, 2000 at 16:36:23, Ernst A. Heinz wrote: >> >>>Hi Bruce, >>> >>>>Let's have another thread about the Nolot positions. >>> >>>Yeah -- that is always serious fun! >>> >>>>Here are my results as of now: >>> >>>I put the results of "DarkThought WCCC'99" on a 500MHz Compaq >>>Alpha-21264 XP1000 right behind yours in the table below. >>> >>>"DarkThought" searched each position for 15 min. The "(d = ...)" >>>information specifies the iteration depth at which the program >>>locked onto the solution move. The "[...]" data lists the move >>>"DarkThought" prefers for the positions it does not solve. >>> >>>> DT Ferret DarkThought WCCC'99 >>>> 4x450 500MHz Alpha-21264 >>>> ------ ------ ------------------- >>>>1 6hr 12:25 min (d = 12) >>>>2 2min 31sec / [Bf6] >>>>3 / [Be2] >>>>4 2.5hr / [Be2] >>>>5 2hr / [h4] >>>>6 / [Bd7] >>>>7 6hr / [Rb7] >>>>8 / [Re1] >>>>9 9min / [Rxc5] >>>>10 2min 11sec / [Bb3] >>>>11 5min 48sec 04:32 min (d = 15) >> >>Most micros find #1 somewhere between 3 and 20 minutes (P6-233), see >>http://sccs.8m.com/nolot.html. >>The only program I have that was able to find #2 was Chessmaster 5555 (again >>P6-233) - I left it running unattended, and when I came back after about 6 >>hours, it had found the move with a +3 eval. > >For #1, I don't think the key is finding Nxh6. The key is to find that it is >winning, namely by finding 2. Nf5! If they play Nxh6 with a -1 eval or so (as >all the programs on your page were doing), and follow up with inferior moves, >they are still going to lose. The test is really about finding _winning_ moves, >and IMO, you must find that the move is winning to have really solved any of >these positions. PV 02:34:54.796 14 -32 [right] Nxh6 c3 Nf5 cxb2 Qg4 Qd7 Kh2 g6 Nh4 Qe8 Nc5 dxc5 Rxe6 Qf7 Nxg6+ Kg8 Nxf8+ Kxf8 Bf5 Mine finds Nxh6 and Nf5, but it doesn't see that it is winning. bruce
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