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Subject: Re: nalimov tablebases KRPP vs KR needed (analysis)

Author: Robert Hyatt

Date: 09:55:16 04/17/03

Go up one level in this thread


Black was winning at move 170 and earlier.  Here is the annotated output for
move 170
and beyond:

170.     Re6
                ({19:-4.55}  170. Re6 Kd7 171. Rb6 Ke8 172. Rb2 Ke7 173. Re2+
Kd7 174. Re5 Kc6 175. Re8 Kd6 176. Re4 Rf5 177. Rh4 Rf3 $19)

170.     ...     Kc8
                ({18:-0.01}  170. ... Kc8 171. Re7 Kb8 172. Rd7 Ka8 173. Rd4 h2
174. Rh4 Rf5 175. Rxh2 $10)
                ({18:-4.42}  170. ... Kd7 171. Rb6 Ke8 172. Rb2 Ke7 173. Re2+
Kd7 174. Re5 Kc6 175. Ra5 Kd6 176. Ra2 Rf8 177. Ra6+ Kc5 178. Ra5+ Kc4 179. Rh5
Rf3 180. Ra5 $19)
171.     Re7
                ({19:-0.01}  171. Re7 Kb8 172. Rh7 Ka8 173. Re7 h2 174. Rh7
h1=Q+ 175. Rxh1 $10)

171.     ...     Kb8
                ({19:-0.01}  171. ... Kb8 172. Rd7 Ka8 173. Rh7 h2 174. Rxh2
$10)
172.     Rg7

Kc8 turned it into an instant draw.  Kd7 held on to -4.42.  There were lots of
other places
where Crafty thought there were better moves, but this was a key mistake...




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