Spliffjiffer wrote: ↑Sat Sep 08, 2018 4:24 pm

hi Jon,

after some back and forth SF-dev says 0.00 after 166.Kb6...seems like a draw eighter way !??...yes, SF says 168.Kb6?? is loosing and gives a draw-score after your suggested 168.Ka7!!(only move)...i have installed some 6-men-TB but not all...this is just a quick observation and not a deep analysis !

Hi guys

I think the search or evaluation of Stockfish would have to be taken with a pinch of salt here. Maybe Komodo sees it much better. Even after seeing that White loses in the game, if you then go back:

Engine: Kaissa IV (512 MB)

by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

52 21:16 -0.90 163...Qa3+ 164.Kb5 Qb2+ 165.Ka6 Qa2+

166.Kb6 Qf7 167.Ka6 Qc4+ 168.Kb6 Qb4+

169.Ka6 Kf4 170.Qe6 Ke4 171.Qc6+ Ke3

172.Qb5 Qc3 173.c6 Bc7 174.b8R Bxb8

175.Qxf5 Qxc6+ 176.Ka5 Bf4 (3.552.008.815) 2783

51 21:16 -0.90 163...Qa1+ 164.Kb6 Qb2+ 165.Ka6 Qa3+

166.Kb6 Qb4+ 167.Ka6 Kf4 168.Qe6 Ke4

169.Qc6+ Ke3 170.Qb5 Qc3 171.c6 Bc7

172.b8R Bxb8 173.Qxf5 Qxc6+ 174.Ka5 Bf4

175.Kb4 Qb6+ 176.Kc4 Qd4+ (3.552.008.815) 2783

Engine: Kaissa IV (512 MB)

by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

56 41:04 -0.90 164.Kb6 Qb4+ 165.Ka6 Kf4 166.Qe6 Ke4

167.Qc6+ Ke3 168.Qb5 Qc3 169.c6 Bc7

170.b8Q Bxb8 171.Qxf5 Qxc6+ 172.Ka5 Bg3

173.Qg5+ Kf3 174.Qf5+ Kg2 175.Qg4 Qd5+

176.Kb4 Kh2 177.Qe2+ (7.542.234.243) 3059

55 41:04 -0.99 164.Kb5 Qb3+ 165.Ka6 Qc4+ 166.Kb6 Qb4+

167.Ka6 Kf4 168.Qc6 Ke3 169.Qb5 Qa3+

170.Kb6 f4 171.c6 Qd6 172.Qb3+ Kf2

173.Qa2+ Kg3 174.Qg8+ Kh2 175.Qh7+ Kg1

176.Qg8+ Kf1 177.Qb3 (7.542.234.243) 3059

But White probably already lost!? Because if you go forward again (without any tablebases in use here)

Engine: Kaissa IV (512 MB)

by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

44 3:56 -2.14 165...Qa4+ 166.Kb6 Qb4+ 167.Ka6 Kf4

168.Qe6 Ke4 169.Qc6+ Ke3 170.Qb5 Qa3+

171.Kb6 f4 172.c6 Qd6 173.Qb3+ Kf2

174.Qc2+ Kf3 175.Qc4 Kg2 176.Qc2+ Kh3

177.Qh7+ Kg3 178.Qg8+ Kh4 (655.500.694) 2776

44 3:56 -2.06 165...Kf4 166.Qe6 Ke4 167.Qc6+ Ke3

168.Qb5 Qc3 169.c6 f4 170.Ka7 Qa3+

171.Kb6 Qd6 172.Qb3+ Kf2 173.Qc2+ Kf3

174.Qc4 Kg2 175.Qc2+ Kh3 176.Qh7+ Kg3

177.Qg8+ Kh4 178.Qh7+ Kg5 (655.500.694) 2776

______________________________________________________

.

.

50 18:01 -2.56 165...Qa4+ 166.Kb6 Qb4+ 167.Ka6 Kf4

168.Qc6 Ke3 169.Qb5 Qa3+ 170.Kb6 f4

171.c6 Qd6 172.Qb3+ Kf2 173.Qc2+ Kg1

174.Qb1+ Kg2 175.Qc2+ Kh3 176.Qh7+ Kg3

177.Qg8+ Kh4 178.Qc4 Kg5 (3.431.517.355) 3171

50 18:01 -2.55 165...Kf4 166.Qc6 Ke3 167.Qb5 Qa3+

168.Kb6 f4 169.c6 Qd6 170.Qb3+ Ke2

171.Qc2+ Kf1 172.Qb1+ Kg2 173.Qc2+ Kh3

174.Qh7+ Kg3 175.Qg8+ Kh4 176.Qc4 Kg5

177.Ka7 Qe7 178.Qg8+ Kh6 (3.431.517.355) 3171

______________________________________________________

51 22:02 -2.85 165...Kf4 166.Qc6 Ke3 167.Qb5 Qa3+

168.Kb6 f4 169.c6 Qd6 170.Qb3+ Kf2

171.Qc2+ Kg1 172.Qc1+ Kg2 173.Qc2+ Kh3

174.Qb3+ Kh4 175.Qc4 Kg5 176.Qg8+ Kh6

177.Qc4 Qf6 178.Qg8 Qe7 (4.074.865.789) 3081

51 22:02 -2.74 165...Qa4+ 166.Kb6 Qb4+ 167.Ka6 Kf4

168.Qc6 Ke3 169.Qb5 Qa3+ 170.Kb6 f4

171.c6 Qd6 172.Qb3+ Kf2 173.Qc2+ Kg1

174.Qc1+ Kg2 175.Qc2+ Kh3 176.Qb3+ Kh4

177.Qc4 Kg5 178.Qg8+ Kh6 (4.074.865.789) 3081