Stockfish patches 1.11.

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Jouni
Posts: 3715
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Stockfish patches 1.11.

Post by Jouni »

Simplify Futility pruning formula
Simplify Corrhist Bonus
Simplify make_index()
Simplify Pawn History Bonus
Simplify correction update condition
Simplify static eval bonus
Simplify r50 condition in cutoff
Simplify best move effort

Stockfish has been too complicated :?:

But this is interesting: Improve retrograde analysys and matefinding capability.
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Jouni
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Re: Stockfish patches 1.11.

Post by Jouni »

NCM testing: regression. OK only 20 000 games.
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Jouni
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Joined: Wed Mar 08, 2006 8:15 pm
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Re: Stockfish patches 1.11.

Post by Jouni »

5 mover in test

[d]rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1

Analysis by Stockfish dev-20251101-bc9f0873:
...
1.Bd5 Kc8 2.Bxa8 Rc4 3.Bxg7 Kc7 4.Bxh6 Ra4 5.Bb7 b4 6.Bg7 b3 7.Kf5 Kd6 8.Bf8+ Kd7 9.Bg7
= (0.00) Depth: 56/20 00:01:08 205mN, tb=2144173
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chessica
Posts: 979
Joined: Thu Aug 11, 2022 11:30 pm
Full name: Esmeralda Pinto

Re: Stockfish patches 1.11.

Post by chessica »

Jouni wrote: ↑Sun Nov 02, 2025 9:32 am 5 mover in test

[d]rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1

Analysis by Stockfish dev-20251101-bc9f0873:
...
1.Bd5 Kc8 2.Bxa8 Rc4 3.Bxg7 Kc7 4.Bxh6 Ra4 5.Bb7 b4 6.Bg7 b3 7.Kf5 Kd6 8.Bf8+ Kd7 9.Bg7
= (0.00) Depth: 56/20 00:01:08 205mN, tb=2144173
[d]rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1

oldie but goldie :-)

GNU Chess 6.3.0:

18/25 00:00,379 1.110k 2.928k 0,00 Le6-d5 b5-b4 Ld5xa8 Kb8xa8 Le5xc7 h6-h5 Kg6xh5 b4-b3 Lc7-e5 b3-b2 Le5xb2 Ka8-b8 Lb2xg7 Kb8-a8 Kh5-g4 Ka8-b8 Kg4-f5 Kb8-a8 Lg7-e5
19/27 00:00,595 1.750k 2.942k 0,00 Le6-d5 b5-b4 Ld5xa8 Kb8xa8 Le5xc7 h6-h5 Kg6xh5 b4-b3 Lc7-e5 b3-b2 Le5xb2 Ka8-b8 Lb2xg7 Kb8-a8 Kh5-g4 Ka8-b8 Kg4-f5 Kb8-a8 Lg7-e5
19/27 00:00,748 2.229k 2.980k +M5 Le6-d7 b5-b4 Kg6-f7 b4-b3 Kf7-e8 b3-b2 Ke8-d8 b2-b1D Le5xc7+
20/27 00:00,755 2.272k 3.010k +M5 Le6-d7 b5-b4 Kg6-f7 b4-b3 Kf7-e8 b3-b2 Ke8-d8 b2-b1D Le5xc7+


GNU Chess-6.2.9:


16 00:00,120 635k 5.292k 0,00 Le6-d5 h6-h5 Kg6xh5 b5-b4 Ld5xa8 Kb8xa8 Le5xc7 b4-b3 Lc7-e5 b3-b2 Le5xb2 Ka8-b8 Lb2xg7 Kb8-a8 Lg7-e5
17 00:00,180 1.062k 5.901k 0,00 Le6-d5 h6-h5 Kg6xh5 b5-b4 Ld5xa8 Kb8xa8 Le5xc7 b4-b3 Lc7-e5 b3-b2 Le5xb2 Ka8-b8 Lb2xg7 Kb8-a8 Lg7-e5
17 00:00,220 1.308k 5.944k +M4 Le6-d7 b5-b4 Kg6-f7 b4-b3 Kf7-e7 b3-b2 Ke7-d8 b2-b1D Le5xc7+
18 00:00,220 1.349k 6.134k +M4 Le6-d7 b5-b4 Kg6-f7 b4-b3 Kf7-e7 b3-b2 Ke7-d8 b2-b1D Le5xc7+
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Jouni
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Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: Stockfish patches 1.11.

Post by Jouni »

My 500 positions mate suite:

Huntsman 1 456
SF11 411
SF20251101 389
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Chris Formula
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Full name: Chris Euler

Re: Stockfish patches 1.11.

Post by Chris Formula »

FEN: rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1

Stockfish Tinapa 3.14.1 SE (no tbs)
#5/31 1.Bd7 b4 2.Kf7 b3 3.Ke8 g6 4.Kd8 b2 5.Bxc7# :)

PlentyChess 7.0.15.1 SE (no tbs)
#5/26 1.Bd7 h5 2.Kf7 h4 3.Ke7 g5 4.Kd8 b4 5.Bxc7# :)
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chessica
Posts: 979
Joined: Thu Aug 11, 2022 11:30 pm
Full name: Esmeralda Pinto

Re: Stockfish patches 1.11.

Post by chessica »

Chris Formula wrote: ↑Sun Nov 02, 2025 6:14 pm FEN: rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1

Stockfish Tinapa 3.14.1 SE (no tbs)
#5/31 1.Bd7 b4 2.Kf7 b3 3.Ke8 g6 4.Kd8 b2 5.Bxc7# :)
...
Hi, where can I download this tinapa chess engine?
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Jouni
Posts: 3715
Joined: Wed Mar 08, 2006 8:15 pm
Full name: Jouni Uski

Re: Stockfish patches 1.11.

Post by Jouni »

2.11. patch can give +25 elo in certain conditions :wink:

```
# PLAYER : RATING ERROR POINTS PLAYED (%)
1 shared_memoryPR : 24.8 1.9 39432.0 73728 53
2 master : 0.0 ---- 34296.0 73728 47
```
But probably 0 elo like in NCM in real conditions.
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Chris Formula
Posts: 132
Joined: Sun Aug 21, 2016 7:59 am
Full name: Chris Euler

Re: Stockfish patches 1.11.

Post by Chris Formula »

chessica wrote: ↑Mon Nov 03, 2025 10:05 am
Chris Formula wrote: ↑Sun Nov 02, 2025 6:14 pm FEN: rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1

Stockfish Tinapa 3.14.1 SE (no tbs)
#5/31 1.Bd7 b4 2.Kf7 b3 3.Ke8 g6 4.Kd8 b2 5.Bxc7# :)
...
Hi, where can I download this tinapa chess engine?
Stockfish Tinapa is not available for download. It's a private mod for now.
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chessica
Posts: 979
Joined: Thu Aug 11, 2022 11:30 pm
Full name: Esmeralda Pinto

Re: Stockfish patches 1.11.

Post by chessica »

chessica wrote: ↑Sun Nov 02, 2025 10:20 am
Jouni wrote: ↑Sun Nov 02, 2025 9:32 am 5 mover in test

[d]rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1

Analysis by Stockfish dev-20251101-bc9f0873:
...
1.Bd5 Kc8 2.Bxa8 Rc4 3.Bxg7 Kc7 4.Bxh6 Ra4 5.Bb7 b4 6.Bg7 b3 7.Kf5 Kd6 8.Bf8+ Kd7 9.Bg7
= (0.00) Depth: 56/20 00:01:08 205mN, tb=2144173
[d]rk6/p1r3p1/P3B1Kp/1p2B3/8/8/8/8 w - - 0 1

oldie but goldie :-)

GNU Chess 6.3.0:

18/25 00:00,379 1.110k 2.928k 0,00 Le6-d5 b5-b4 Ld5xa8 Kb8xa8 Le5xc7 h6-h5 Kg6xh5 b4-b3 Lc7-e5 b3-b2 Le5xb2 Ka8-b8 Lb2xg7 Kb8-a8 Kh5-g4 Ka8-b8 Kg4-f5 Kb8-a8 Lg7-e5
19/27 00:00,595 1.750k 2.942k 0,00 Le6-d5 b5-b4 Ld5xa8 Kb8xa8 Le5xc7 h6-h5 Kg6xh5 b4-b3 Lc7-e5 b3-b2 Le5xb2 Ka8-b8 Lb2xg7 Kb8-a8 Kh5-g4 Ka8-b8 Kg4-f5 Kb8-a8 Lg7-e5
19/27 00:00,748 2.229k 2.980k +M5 Le6-d7 b5-b4 Kg6-f7 b4-b3 Kf7-e8 b3-b2 Ke8-d8 b2-b1D Le5xc7+
20/27 00:00,755 2.272k 3.010k +M5 Le6-d7 b5-b4 Kg6-f7 b4-b3 Kf7-e8 b3-b2 Ke8-d8 b2-b1D Le5xc7+


GNU Chess-6.2.9:


16 00:00,120 635k 5.292k 0,00 Le6-d5 h6-h5 Kg6xh5 b5-b4 Ld5xa8 Kb8xa8 Le5xc7 b4-b3 Lc7-e5 b3-b2 Le5xb2 Ka8-b8 Lb2xg7 Kb8-a8 Lg7-e5
17 00:00,180 1.062k 5.901k 0,00 Le6-d5 h6-h5 Kg6xh5 b5-b4 Ld5xa8 Kb8xa8 Le5xc7 b4-b3 Lc7-e5 b3-b2 Le5xb2 Ka8-b8 Lb2xg7 Kb8-a8 Lg7-e5
17 00:00,220 1.308k 5.944k +M4 Le6-d7 b5-b4 Kg6-f7 b4-b3 Kf7-e7 b3-b2 Ke7-d8 b2-b1D Le5xc7+
18 00:00,220 1.349k 6.134k +M4 Le6-d7 b5-b4 Kg6-f7 b4-b3 Kf7-e7 b3-b2 Ke7-d8 b2-b1D Le5xc7+


DON 3.5:

Code: Select all

 102/18+	01:51,186	 120.513k	1.084k	+4,04	Le6-d7
 102/18	01:51,222	 120.629k	1.085k	+M5	Le6-d7 b5-b4 Kg6-f7 h6-h5 Kf7-e8 h5-h4 Ke8-d8 g7-g5 Le5xc7+
 103/10	01:51,245	 120.743k	1.085k	+M5	Le6-d7 b5-b4 Kg6-f7 h6-h5 Kf7-e8 h5-h4 Ke8-d8 g7-g5 Le5xc7+
...
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