Bishop ( same color ) Endgame. SF kept all her pawns into same color as enemy bishop.

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Nay Lin Tun
Posts: 570
Joined: Mon Jan 16, 2012 5:34 am

Bishop ( same color ) Endgame. SF kept all her pawns into same color as enemy bishop.

Post by Nay Lin Tun » Thu Dec 19, 2019 1:25 am

https://ibb.co/Dw9XbRH


Jouni
Posts: 2109
Joined: Wed Mar 08, 2006 7:15 pm

Re: Bishop ( same color ) Endgame. SF kept all her pawns into same color as enemy bishop.

Post by Jouni » Sat Dec 21, 2019 2:05 pm

Fishcooking claims, that after 43...f5?? game is lost. Difficult position with 5 piece syzygy SF is long clueless



Analysis by Stockfish 211119 64 BMI2:

44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7 51.Bc6 a5 52.Ba4 Ke6 53.Be8 Kf6 54.Kf3 Bd3 55.Bc6 Bc4 56.Kg3 Ke7 57.Ba4 Ke6 58.Be8 Kf6 59.Kf2
= (0.00) Depth: 56/46 00:00:36 278mN, tb=1168017
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7
= (0.00) Depth: 57/31 00:00:43 318mN, tb=1523000
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7
= (0.00) Depth: 58/27 00:00:52 373mN, tb=1806349
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7 51.Bc6 a5 52.Ba4 Ke6 53.Be8 Kf6 54.Kd2 Bb3 55.Ke3
= (0.00) Depth: 59/24 00:01:01 436mN, tb=2161699
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7
= (0.00) Depth: 60/39 00:01:10 496mN, tb=2737499
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7
= (0.00) Depth: 61/21 00:01:18 560mN, tb=3099522
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7 51.Bc6 a5 52.Ba4 Kf7 53.Bd1 Ke6 54.Bf3 Kd6 55.Kf2 Bb5 56.Kg3 Bc4
= (0.00) Depth: 62/27 00:01:25 613mN, tb=3343251
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7
= (0.00) Depth: 63/15 00:01:31 662mN, tb=3633674
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7 51.Bd1 Kd7 52.Kd2 Kd6 53.Ba4 Ke7 54.Bc6 Ke6 55.Be8 Kf6 56.Ke3 a5 57.Bc6 Ke7 58.Kd2 Ke6 59.Kc2 Ke7 60.Kb1 Ke6 61.Kb2 Kf6 62.Kc1 Ke6 63.Be8 Kf6
= (0.00) Depth: 64/51 00:01:56 851mN, tb=5154405
44.Bd1 Bb5 45.Bc2 b6 46.Kh3 Be2 47.Kg3 Ke7 48.Kf2 Bc4 49.Ke3 Ke6 50.Ba4 Ke7 51.Bd1 Kd7 52.Kd2 Kd6 53.Kc2 Ke6 54.Kb2 Kf6 55.Bc2 a5 56.Kc1 Ke6 57.Ba4 Kf6
= (0.00) Depth: 65/29 00:03:38 1591mN, tb=10597034
Jouni

peter
Posts: 1853
Joined: Sat Feb 16, 2008 6:38 am
Full name: Peter Martan

Re: Bishop ( same color ) Endgame. SF kept all her pawns into same color as enemy bishop.

Post by peter » Sat Dec 21, 2019 7:26 pm

Jouni wrote:
Sat Dec 21, 2019 2:05 pm
Fishcooking claims, that after 43...f5?? game is lost. Difficult position with 5 piece syzygy SF is long clueless

Postion before 44...f5? is a very deep Zugzwang avoid move test.

Crystal without tbs at 12x3GHz, 32G hash:



Analysis by Crystal 011219 64 POPCNT:

Code: Select all

43...f5 44.Ld1 a5 45.Kg3 Lb5 46.Kf2 Ld7 
  =/+  (-0.46)   Tiefe: 7/9   00:00:16  60kN
43...f5 44.Le2 Lf7 45.Kg3 a5 46.Kf2 b6 47.Kg3 Le6 
  =  (-0.18)   Tiefe: 8/12   00:00:16  140kN
43...f5 44.Le2 La4 45.Kg3 Lb3 46.Kf3 Lc2 47.Kf2 a5 48.Ke3 
  =  (-0.12)   Tiefe: 9/12   00:00:16  197kN
43...f5 44.Le2 a5 45.Kg3 b6 46.Kf2 La4 47.Ke3 Kc6 48.h5 gxh5 49.Lxh5 
  =  (-0.08)   Tiefe: 10/17   00:00:16  280kN
43...f5 44.Le2 a5 45.Kg3 b6 46.Kf3 Lc6 47.Ke3 La4 48.Kf2 Lc2 49.Kf3 Le4+ 50.Ke3 Ke6 
  =  (0.00)   Tiefe: 11/17   00:00:16  388kN
...
43...f5 44.Le2 a5 45.Kg3 Ld7 46.Lf3 Le6 47.Le2 
  =  (0.00)   Tiefe: 37/10   00:01:31  1836MN
43...f5 44.Lf3 
  =  (0.09 --)   Tiefe: 38/41   00:02:27  3189MN
43...f5 44.Le2 
  =  (0.19 --)   Tiefe: 38/48   00:02:31  3284MN
43...f5 44.Le2 
  +/=  (0.34 --)   Tiefe: 38/50   00:02:38  3468MN
43...f5 44.Le2 
  +/=  (0.54 --)   Tiefe: 38/84   00:02:46  3639MN
43...f5 44.Lf3 
  +/-  (0.81 --)   Tiefe: 38/84   00:02:59  3948MN
43...f5 44.Lf3 
  +/-  (1.17 --)   Tiefe: 38/84   00:03:33  4748MN
43...Lb5 
  +/-  (0.88 ++)   Tiefe: 38/84   00:04:07  5540MN
43...Lb5 
  =  (0.27 ++)   Tiefe: 38/84   00:04:27  5994MN
43...Lb5 44.Kg3 b6 45.f5 g5 46.hxg5 fxg5 47.Lf3 Ke7 48.Lxd5 Ld3 49.c4 Lxf5 50.c5 bxc5 51.dxc5 a5 52.Lb7 Kd7 53.Lf3 Ke6 54.Lg4 Lxg4 55.Kxg4 Kd5 56.Kxg5 Kxc5 57.Kf5 a4 58.Ke4 Kc4 59.Ke3 Kc3 60.Ke4 
  =  (0.00)   Tiefe: 38/84   00:04:43  6369MN
...
43...Lb5 44.Kg3 b6 45.f5 g5 46.hxg5 fxg5 47.Lf3 Ke7 48.Kg4 Kf6 49.Lxd5 Le2+ 50.Kg3 Kxf5 51.Kf2 Lh5 52.Ke3 a5 53.c4 Le8 54.Le4+ Kf6 55.Lf3 Ld7 56.Le4 
  =  (0.00)   Tiefe: 41/32   00:05:02  6832MN
CorChess has ...f5 with rising eval and changing to ...Bb5 in similiar time at another single try.
SF dev. with same hardware and also without tbs took 8' and depth 69 till eval of ...f5 started to climb.
Peter.

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