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Mat in 17 ?
Posted: Sun Jan 20, 2013 3:52 pm
by Nex
5k2/1R6/5p2/2K2B2/8/6P1/3r1P2/8 w - - 0 1
Analysis by Deep Junior 13.3:
66.f2-f4 Td2-a2 67.g3-g4 Rf8-e8 68.Ff5-d3 Re8-f8 69.Fd3-c4 Ta2-a5+ 70.Rc5-d6 Ta5-a4 71.Tb7-f7+ Rf8-g8 72.Tf7-c7+ Rg8-f8 73.Fc4-d5 Ta4-a6+ 74.Fd5-c6 Ta6-b6 75.Tc7-b7
+- (#17) Profondeur: 30 01:56:39 41192mN, tb=8461905
Re: Mat in 17 ?
Posted: Tue Jan 22, 2013 1:08 pm
by zullil
After a very long search, Stockfish says mate in ≤ 21:
info depth 41 seldepth 92 score mate 21 nodes 504204839263 nps 10997055 time 45849075 multipv 1 pv f2f4 d2a2 f5e6 a2a5 c5d6 a5a6 d6d5 a6a5 d5e4 f8e8 g3g4 e8d8 b7g7 a5a1 g4g5 f6g5 f4g5 a1e1 e4f5 e1f1 f5e5 f1b1 g5g6 b1b5 e5f6 b5b1 g7a7 b1f1 f6e5 f1e1 e5d6 e1d1 e6d5 d1d5 d6d5 d8c8 g6g7 c8b8 a7f7 b8c8 g7g8q
[Event "Edited position"]
[Site "ProcyonLeo.local"]
[Date "2013.01.22"]
[Round "-"]
[White "-"]
[Black "-"]
[Result "1-0"]
[FEN "5k2/1R6/5p2/2K2B2/8/6P1/3r1P2/8 w - - 0 1"]
[SetUp "1"]
{--------------
. . . . . k . .
. R . . . . . .
. . . . . p . .
. . K . . B . .
. . . . . . . .
. . . . . . P .
. . . r . P . .
. . . . . . . .
white to play
--------------}
1. f4 Ra2 2. Be6 Ra5+ 3. Kd6 Ra6+ 4. Kd5 Ra5+ 5. Ke4 Ke8 6. g4 Kd8 7. Rg7
Ra1 8. g5 fxg5 9. fxg5 Re1+ 10. Kf5 Rf1+ 11. Ke5 Rb1 12. g6 Rb5+ 13. Kf6
Rb1 14. Ra7 Rf1+ 15. Ke5 Re1+ 16. Kd6 Rd1+ 17. Bd5 Rxd5+ 18. Kxd5 Kc8 19.
g7 Kb8 20. Rf7 Kc8 21. g8=Q#
{Xboard adjudication: Checkmate} 1-0