Author: Gerd Isenberg
Date: 11:19:37 07/29/03
Go up one level in this thread
On July 29, 2003 at 12:11:21, Ulrich Tuerke wrote: >On July 29, 2003 at 11:59:06, Ulrich Tuerke wrote: > >>On July 29, 2003 at 11:56:12, Steffen Jakob wrote: >> >>>Hi Uli! >>> >>>On July 29, 2003 at 11:50:14, Ulrich Tuerke wrote: >>> >>>>>[D]8/p7/2K5/1P6/1k6/8/7p/7B w - - 0 67 >>>>> >>>>>Is there an engine which sees that this is a draw? Here is the complete score: >>> >>>>Comet sees it (without TB); I guess, many engines will: >>> >>>At least Hossa and Fritz 8 don't. >>> >>>>Comet-B.60 Tue Jul 29 17:43:34 2003 >>>> >>>>depth score sec nodes pv >>>> 1. -0.98 0 37 h1e4 >>>> 2. -0.98 0 118 h1d5 b4c3 >>>> 3. -0.84 0 594 h1d5 b4c3 c6d6 >>>> 4. -0.40 0 991 h1d5 b4c3 d5h1 c3d4 >>>> 4. -0.40 0 1750 h1d5 b4c3 d5h1 c3d4 >>>> 5. -0.67 0 4167 h1d5 b4a5 c6c5 a5a4 d5b7 >>>> 5. -0.67 0 7274 h1d5 b4a5 c6c5 a5a4 d5b7 >>>> 6. -0.29 0 10668 h1d5 b4c3 c6d6 c3d4 d5c6 d4e3 >>>> 6. -0.29 0 20066 h1d5 b4c3 c6d6 c3d4 d5c6 d4e3 >>>> 7. -0.08 0 43767 h1d5 b4a4 d5e4 a4a5 c6c5 a7a6 b5b6 >>> >>>Do I interpret this correctly that Comet sees an advantage for black in the >>>first 7 plies? Bishop and pawn vs. 2 bishops? >> >>Yes, that's right. >>What have I done ? >> >>I guess, I'll have to have a look into the code to understand. -:) > > > >Looks like, it's black advanced passer leading to this score. The value of a >lonely bishop decreases in Comet's eval with decreasing number of pawns on the >board. > >OTOH, Comet knows that king + bishop alone can never win. So there is an upper >limit of 0.0 for these kind of positions from white's point of view. White can't >move its king without loosing it's pawn, which is a draw. Hi Uli, really great! Is all that knowledge in static eval for this special ending, bishop+pawn against pawns? Regards, Gerd >Black can't move its >king much either without loosing the game. It has to have a look on white's >pawn. > >Thus, we see white bishop and black king moving back and forth, leading to >repetitions. > >Uli >> >>Uli >> >> >> >>> >>>Greetings, >>>Steffen.
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