Stockfish version with hash saving capability

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Rodolfo Leoni
Posts: 545
Joined: Tue Jun 06, 2017 4:49 pm
Location: Italy

Re: Stockfish version with hash saving capability

Post by Rodolfo Leoni »

Chess762 wrote:Hello all!
I tested your Stockfish in such position
3r2kr/p1p2p1p/1p3P1B/3P1b2/2P3p1/8/PP3K2/4R3 w - - 0 0
It works great. Houdini 5 works with the saving hash-file function as well.

Analysis by Stockfish 250717 64 POPCNT:

1.Re5 Bg6 2.b4 Bb1 3.c5 g3+ 4.Kxg3 bxc5 5.bxc5 Bg6 6.d6 cxd6 7.cxd6 Rc8 8.d7 Rc3+ 9.Kh4 Rc4+ 10.Kg5 Rg4+ 11.Kxg4 Bh5+ 12.Kg3 Bg6 13.d8Q#
White mates: +- (#13) Depth: 96/26 00:05:01 3136MN, tb=8865124
(, 31.07.2017)
but when I tried to use AsvFish 2017-07-10 and Komodo 11.01 they don't catch the winning variation after loading hash-file. Why it occurs?
Hi Alex,

Komodo and AsmFishW have the save/load hashes option, but their hashes don't persist very much. It happens that valuable entries are overwritten after few time. I tested them only few minutes, and I'm not sure...

We should hope Mark Lefler and Lyudmil Antonov read this post and write a reply.

Welcome here! :)
F.S.I. Chess Teacher
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Chess762
Posts: 4
Joined: Fri Jul 28, 2017 11:55 am
Location: Russia

Re: Stockfish version with hash saving capability

Post by Chess762 »

Rodolfo Leoni wrote:
We should hope Mark Lefler and Lyudmil Antonov read this post and write a reply.

Welcome here! :)
Thank you Rodolfo! :)
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Rodolfo Leoni
Posts: 545
Joined: Tue Jun 06, 2017 4:49 pm
Location: Italy

New idea for hashes

Post by Rodolfo Leoni »

I was thinking about hash size, which often needs to be huge. If it's possible to "prune" them depending by entries depth we could get lesser file size.

What about a "Prune to Min depth X" or a "Prune to Max size Y MBs"? Or, maybe, an "and" condition for those options?
F.S.I. Chess Teacher
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Rodolfo Leoni
Posts: 545
Joined: Tue Jun 06, 2017 4:49 pm
Location: Italy

Re: New idea for hashes

Post by Rodolfo Leoni »

Step 1: Infinite search, 1 GB empty hashes.

[d]r3kb1r/1bqn1p1p/p1Np1P2/3P4/1p6/5Q1B/PPP4P/2KR2R1 b kq - 4 20

Code: Select all

FEN: r3kb1r/1bqn1p1p/p1Np1P2/3P4/1p6/5Q1B/PPP4P/2KR2R1 b kq - 4 20

Stockfish_x64_modern_170724_savehash:
 8/8	00:00	 8k	2,570k	+0.32	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe4 Bh6 24.Nxe5 dxe5
 9/15	00:00	 19k	3,225k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3
 10/13	00:00	 22k	3,146k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3 Ke8
 11/16	00:00	 28k	3,099k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3 Ke8 27.Bd7+ Kd8
 12/17	00:00	 35k	3,159k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3 Ke8 27.Bd7+ Kd8
 13/25	00:00	 91k	3,630k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3 Ke8 27.Bd7+ Kd8
 14/24	00:00	 497k	3,733k	-0.34	20. ... Ne5 21.Rge1 h5 22.Kb1 Bxc6 23.dxc6 Rh6 24.Qf4 Rb8 25.Rxe5+ dxe5 26.Bd7+ Kd8 27.Qg5 Qa5 28.Qg8 Kc7 29.Qxf7
 15/26	00:00	 1,405k	3,640k	-0.31	20. ... Ne5 21.Rge1 Rg8 22.Qh5 Bxc6 23.dxc6 Rg6 24.Bd7+ Kd8 25.Bf5 Ke8 26.Kb1 a5 27.Qxh7 Rxf6 28.Bd7+ Kd8 29.Qh8 Ke7 30.Qh4 Bg7
 16/29	00:00	 1,841k	3,711k	-0.79	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf5 Bc8 24.Qd3 Bxh3 25.Qxh3 Ra6 26.Rd4 Rxc6 27.dxc6 h4 28.Qf5 h3
 17/33	00:00	 2,797k	3,734k	-0.80	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf5 Bc8 24.Qd3 Bxh3 25.Qxh3 Ra6 26.Rd4 Rb6 27.Qf5 Rg8 28.Qxh5 Rxc6 29.dxc6 Rg2 30.Rd5 a4
 18/30	00:00	 3,340k	3,745k	-0.73	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.Rd2 Rb8 30.Rdf2 Nxd7 31.cxd7 Qc3 32.b3 Rb4 33.Qg5 Qe5 34.Qxe5+ dxe5 35.Rxf6 Bxf6
 19/40	00:01	 4,053k	3,728k	-0.55	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.b3 a5 30.Rf4 a4 31.b4 Qb6 32.a3 Rb8 33.Rf5 Qc7 34.Rff1
 20/42	00:01	 5,478k	3,744k	-0.18	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.b3 a5 30.a3 a4 31.b4 Bh8 32.b5 Rg8 33.Bh3 Qa5 34.Rd5 h6 35.Ka2 Rg5
 21/50	00:03	 12,557k	3,657k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.Qg5 Bh8 30.Qh4 Bg7
 22/34	00:03	 14,134k	3,649k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.Qg5 Bh8 30.Qh4 Bg7
 23/22	00:04	 14,879k	3,650k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.Qg5 Bh8 30.Qh4 Bg7
 24/39-	00:04	 17,616k	3,651k	-0.07	20. ... Ne5 21.Rge1
 24/39+	00:04	 17,811k	3,648k	 0.00	20. ... Ne5
 24/39	00:05	 18,489k	3,642k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Bh3 Ke8 28.Bd7+ Kd8
 25/34	00:06	 22,942k	3,632k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Bf5 Ke8 28.Qh4 Rxf5 29.Qxh6 Rd8 30.Qxh7 Rg5 31.a3 Rg6 32.h3 Rb8 33.b3 Re6 34.Rf1 Ke7 35.Qh4+ Kf8 36.Qh7 Ke7
 26/22	00:07	 26,250k	3,617k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 27/22	00:07	 28,412k	3,618k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 28/22	00:10	 38,453k	3,613k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 29/22	00:14	 52,577k	3,626k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 30/22	00:16	 58,938k	3,627k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 31/22	00:24	 88,986k	3,632k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 32/22	00:29	 106,318k	3,636k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 33/47	00:42	 156,050k	3,631k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 34/22	01:04	 232,761k	3,610k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 35/22	01:09	 250,170k	3,610k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8

Step 2: On infinite analysis, 1 GB hashes, I "navigated" the variations, old style move. Then I saved hashes, I closed/restarted the GUI, I loaded hashes and here's what happened.

Code: Select all

FEN: r3kb1r/1bqn1p1p/p1Np1P2/3P4/1p6/5Q1B/PPP4P/2KR2R1 b kq - 4 20

Stockfish_x64_modern_170724_savehash:
 8/9	00:00	 2k	1,095k	-1.10	20. ... Ne5 21.Rge1 h5 22.Kb1 Bxc6 23.dxc6 Bh6 24.Bd7+ Kd8
 9/10	00:00	 3k	1,616k	-1.08	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf4 Bxc6 24.dxc6 Bh6 25.Qc4
 10/13	00:00	 6k	1,873k	-1.08	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf4 Bxc6 24.dxc6 Bh6 25.Qc4 0-0 26.Qh4
 11/14	00:00	 7k	1,864k	-1.08	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf4 Bxc6 24.dxc6 Bh6 25.Qc4 0-0 26.Qh4 Ng6 27.Qxh5
 12/18	00:00	 19k	2,421k	-1.11	20. ... Ne5 21.Rge1 b3 22.axb3 Rg8 23.Kb1 Bxc6 24.dxc6 Rg6 25.Qf4 Bh6 26.Qh4 Rb8
 13/17	00:00	 26k	2,604k	-1.11	20. ... Ne5 21.Rge1 b3 22.axb3 Rg8 23.Kb1 Bxc6 24.dxc6 Rg6 25.Qf4 Bh6 26.Qh4 Kf8 27.Bf5 Nf3 28.Qh3 Nxe1
 14/21	00:00	 67k	3,695k	-1.11	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf4 Bxc6 24.dxc6 a4 25.Bd7+ Kd8 26.Rxe5 dxe5 27.Qc4 Bd6 28.Qxf7
 15/26	00:00	 126k	4,505k	-1.05	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.a4 Rb8 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5
 16/35	00:00	 141k	4,396k	-1.12	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.a4 Rb8 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5
 17/47	00:00	 346k	5,094k	-1.12	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6
 18/31	00:00	 361k	5,087k	-1.12	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Ka1 Rb1+ 33.Ka2 Rb2+ 34.Kxb2 Qb8+ 35.Qb5
 19/37	00:00	 378k	4,969k	-1.12	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Ka1 Rb1+ 33.Ka2 Rb2+ 34.Kxb2 Qb8+ 35.Qb5 Qxb5+ 36.axb5 fxe6 37.bxa6 Bc5 38.Bxe6 e4
 20/43	00:00	 441k	5,073k	-1.04	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Ka1 Rb1+ 33.Ka2 Rb2+ 34.Kxb2
 21/35	00:00	 489k	5,146k	-1.04	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3
 22/39	00:00	 726k	5,499k	-1.03	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6
 23/50	00:00	 882k	5,656k	-1.10	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7
 24/48	00:00	 1,304k	6,011k	-1.16	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.Be4
 25/43	00:00	 1,618k	6,130k	-1.04	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Rxe5+ dxe5 26.Qxb4 Rxf6 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3
 26/52	00:00	 2,304k	6,095k	-1.11	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.Be4 Ba7 41.h4 Kb6 42.h5
 27/52	00:00	 2,873k	5,998k	-1.06	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.h4 Ba7 40.h5 Bb8 41.Kd3 Kb6 42.Kxe3 Kxa6
 28/53	00:01	 8,476k	5,419k	-1.18	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.a4 Rb8 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.h4 Ba7 40.h5 Kb6 41.Kd3 Bb8 42.Kxe3 Kxa6 43.h6 Kb6 44.Be4 Bd6 45.c7 Kxc7 46.Bxh7 Bc5+ 47.Kf4
 29/47	00:01	 9,775k	5,365k	-1.09	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Rb8 25.Bd7+ Kd8 26.Bf5 Ke8 27.Rd5 Rb5 28.Rxb5 axb5 29.Qxb4 Qxc6 30.Bd3 Qb7 31.a4 Kd7 32.Bxg6 hxg6 33.axb5 Qb6 34.Rxe5 dxe5 35.Qxf8 Qxf6 36.b4 Qe6 37.b6 Qd6 38.Qxf7+ Kc6 39.Qf3+ Kxb6 40.Qe4 g5
 30/50-	00:05	 29,487k	5,079k	-1.16	20. ... Ne5 21.Rge1
 30/51+	00:05	 29,635k	5,078k	-1.09	20. ... Ne5
 30/51	00:05	 29,890k	5,076k	-1.05	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.h4 Ba7
 31/45	00:06	 33,609k	5,021k	-1.05	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.h4 Ba7 41.h5 Kb6 42.Be4 Kc7
 32/48-	00:07	 38,691k	4,965k	-1.12	20. ... Ne5 21.Rge1
 32/53+	00:08	 42,518k	4,947k	-1.05	20. ... Ne5
 32/53	00:09	 48,799k	4,904k	-1.03	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.Be4 Ba7 41.Ke2 Kb6 42.h3 Bb8 43.Bd3
 33/56-	00:12	 60,450k	4,817k	-1.10	20. ... Ne5 21.Rge1
 33/59	00:19	 91,228k	4,644k	-1.16	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.Kd3 h6 40.h4 Ba7 41.h5 Kb6 42.Ke2 Bb8 43.Bc4 Kxc6 44.Kxe3 Kc5 45.Be2 Kd5 46.Kd3 Ba7 47.c3 Bc5 48.Bg4 Kc6
 34/54	00:21	 100,464k	4,596k	-1.11	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.Kd3 Ba7 40.h4 h6 41.h5 Kb6 42.Ke2 Kc7 43.Bf3 Kb6 44.c3 Bb8 45.Kxe3 Kxa6 46.Ke4 Kb6
 35/52	00:32	 144,749k	4,429k	-1.11	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.Kd3 Ba7 40.h4 h6 41.h5 Kb6 42.Ke2 Kc7 43.Bf3 Kb6 44.c3 Bb8 45.Kxe3 Kxa6 46.Ke4
 36/52	00:39	 171,390k	4,368k	-1.11	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.Kd3 Ba7 40.h4 h6 41.h5 Kb6 42.Ke2 Kc7 43.Bf3 Kb6 44.c3 Bb8 45.Kxe3 Kxa6 46.Ke4
 35/60	00:39	 171,390k	4,368k	-1.08	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.h4 Ba7 40.Kd3 h6 41.h5 Kb6 42.Ke2 Bb8 43.Bc4 Kxc6 44.Kxe3 Kb6 45.Kd4 Bg3 46.Bd3 Bf4 47.Kd5

It's not only the fact it has been faster. The most relevant fact (and most important for a chess player) is that score got propagated. This gives a player an indication of a more precise value of a position.
F.S.I. Chess Teacher
Top
giovanni
Posts: 142
Joined: Wed Jul 08, 2015 12:30 pm

Re: New idea for hashes

Post by giovanni »

I got a little bit lost, Rodolfo. Was this test done using Stockfish-TCEC6-32-PA_GT or the lastest 'savehash' Stockfish version by Daniel Jose?


Rodolfo Leoni wrote:Step 1: Infinite search, 1 GB empty hashes.

[d]r3kb1r/1bqn1p1p/p1Np1P2/3P4/1p6/5Q1B/PPP4P/2KR2R1 b kq - 4 20

Code: Select all

FEN: r3kb1r/1bqn1p1p/p1Np1P2/3P4/1p6/5Q1B/PPP4P/2KR2R1 b kq - 4 20

Stockfish_x64_modern_170724_savehash:
 8/8	00:00	 8k	2,570k	+0.32	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe4 Bh6 24.Nxe5 dxe5
 9/15	00:00	 19k	3,225k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3
 10/13	00:00	 22k	3,146k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3 Ke8
 11/16	00:00	 28k	3,099k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3 Ke8 27.Bd7+ Kd8
 12/17	00:00	 35k	3,159k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3 Ke8 27.Bd7+ Kd8
 13/25	00:00	 91k	3,630k	 0.00	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qe2 Bxc6 24.dxc6 Rh6 25.Bd7+ Kd8 26.Bh3 Ke8 27.Bd7+ Kd8
 14/24	00:00	 497k	3,733k	-0.34	20. ... Ne5 21.Rge1 h5 22.Kb1 Bxc6 23.dxc6 Rh6 24.Qf4 Rb8 25.Rxe5+ dxe5 26.Bd7+ Kd8 27.Qg5 Qa5 28.Qg8 Kc7 29.Qxf7
 15/26	00:00	 1,405k	3,640k	-0.31	20. ... Ne5 21.Rge1 Rg8 22.Qh5 Bxc6 23.dxc6 Rg6 24.Bd7+ Kd8 25.Bf5 Ke8 26.Kb1 a5 27.Qxh7 Rxf6 28.Bd7+ Kd8 29.Qh8 Ke7 30.Qh4 Bg7
 16/29	00:00	 1,841k	3,711k	-0.79	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf5 Bc8 24.Qd3 Bxh3 25.Qxh3 Ra6 26.Rd4 Rxc6 27.dxc6 h4 28.Qf5 h3
 17/33	00:00	 2,797k	3,734k	-0.80	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf5 Bc8 24.Qd3 Bxh3 25.Qxh3 Ra6 26.Rd4 Rb6 27.Qf5 Rg8 28.Qxh5 Rxc6 29.dxc6 Rg2 30.Rd5 a4
 18/30	00:00	 3,340k	3,745k	-0.73	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.Rd2 Rb8 30.Rdf2 Nxd7 31.cxd7 Qc3 32.b3 Rb4 33.Qg5 Qe5 34.Qxe5+ dxe5 35.Rxf6 Bxf6
 19/40	00:01	 4,053k	3,728k	-0.55	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.b3 a5 30.Rf4 a4 31.b4 Qb6 32.a3 Rb8 33.Rf5 Qc7 34.Rff1
 20/42	00:01	 5,478k	3,744k	-0.18	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.b3 a5 30.a3 a4 31.b4 Bh8 32.b5 Rg8 33.Bh3 Qa5 34.Rd5 h6 35.Ka2 Rg5
 21/50	00:03	 12,557k	3,657k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.Qg5 Bh8 30.Qh4 Bg7
 22/34	00:03	 14,134k	3,649k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.Qg5 Bh8 30.Qh4 Bg7
 23/22	00:04	 14,879k	3,650k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Qh4 Ke7 28.Rf1 Bg7 29.Qg5 Bh8 30.Qh4 Bg7
 24/39-	00:04	 17,616k	3,651k	-0.07	20. ... Ne5 21.Rge1
 24/39+	00:04	 17,811k	3,648k	 0.00	20. ... Ne5
 24/39	00:05	 18,489k	3,642k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Bh3 Ke8 28.Bd7+ Kd8
 25/34	00:06	 22,942k	3,632k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Bf5 Ke8 28.Qh4 Rxf5 29.Qxh6 Rd8 30.Qxh7 Rg5 31.a3 Rg6 32.h3 Rb8 33.b3 Re6 34.Rf1 Ke7 35.Qh4+ Kf8 36.Qh7 Ke7
 26/22	00:07	 26,250k	3,617k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 27/22	00:07	 28,412k	3,618k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 28/22	00:10	 38,453k	3,613k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 29/22	00:14	 52,577k	3,626k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 30/22	00:16	 58,938k	3,627k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 31/22	00:24	 88,986k	3,632k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 32/22	00:29	 106,318k	3,636k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 33/47	00:42	 156,050k	3,631k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 34/22	01:04	 232,761k	3,610k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8
 35/22	01:09	 250,170k	3,610k	 0.00	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.b3 Bg7 28.Rxe5 dxe5 29.Bf5+ Ke8 30.Bd7+ Kd8

Step 2: On infinite analysis, 1 GB hashes, I "navigated" the variations, old style move. Then I saved hashes, I closed/restarted the GUI, I loaded hashes and here's what happened.

Code: Select all

FEN: r3kb1r/1bqn1p1p/p1Np1P2/3P4/1p6/5Q1B/PPP4P/2KR2R1 b kq - 4 20

Stockfish_x64_modern_170724_savehash:
 8/9	00:00	 2k	1,095k	-1.10	20. ... Ne5 21.Rge1 h5 22.Kb1 Bxc6 23.dxc6 Bh6 24.Bd7+ Kd8
 9/10	00:00	 3k	1,616k	-1.08	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf4 Bxc6 24.dxc6 Bh6 25.Qc4
 10/13	00:00	 6k	1,873k	-1.08	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf4 Bxc6 24.dxc6 Bh6 25.Qc4 0-0 26.Qh4
 11/14	00:00	 7k	1,864k	-1.08	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf4 Bxc6 24.dxc6 Bh6 25.Qc4 0-0 26.Qh4 Ng6 27.Qxh5
 12/18	00:00	 19k	2,421k	-1.11	20. ... Ne5 21.Rge1 b3 22.axb3 Rg8 23.Kb1 Bxc6 24.dxc6 Rg6 25.Qf4 Bh6 26.Qh4 Rb8
 13/17	00:00	 26k	2,604k	-1.11	20. ... Ne5 21.Rge1 b3 22.axb3 Rg8 23.Kb1 Bxc6 24.dxc6 Rg6 25.Qf4 Bh6 26.Qh4 Kf8 27.Bf5 Nf3 28.Qh3 Nxe1
 14/21	00:00	 67k	3,695k	-1.11	20. ... Ne5 21.Rge1 h5 22.Kb1 a5 23.Qf4 Bxc6 24.dxc6 a4 25.Bd7+ Kd8 26.Rxe5 dxe5 27.Qc4 Bd6 28.Qxf7
 15/26	00:00	 126k	4,505k	-1.05	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.a4 Rb8 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5
 16/35	00:00	 141k	4,396k	-1.12	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.a4 Rb8 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5
 17/47	00:00	 346k	5,094k	-1.12	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6
 18/31	00:00	 361k	5,087k	-1.12	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Ka1 Rb1+ 33.Ka2 Rb2+ 34.Kxb2 Qb8+ 35.Qb5
 19/37	00:00	 378k	4,969k	-1.12	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Ka1 Rb1+ 33.Ka2 Rb2+ 34.Kxb2 Qb8+ 35.Qb5 Qxb5+ 36.axb5 fxe6 37.bxa6 Bc5 38.Bxe6 e4
 20/43	00:00	 441k	5,073k	-1.04	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Ka1 Rb1+ 33.Ka2 Rb2+ 34.Kxb2
 21/35	00:00	 489k	5,146k	-1.04	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3
 22/39	00:00	 726k	5,499k	-1.03	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6
 23/50	00:00	 882k	5,656k	-1.10	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7
 24/48	00:00	 1,304k	6,011k	-1.16	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.Be4
 25/43	00:00	 1,618k	6,130k	-1.04	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Rxe5+ dxe5 26.Qxb4 Rxf6 27.Bd7+ Kd8 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3
 26/52	00:00	 2,304k	6,095k	-1.11	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.Be4 Ba7 41.h4 Kb6 42.h5
 27/52	00:00	 2,873k	5,998k	-1.06	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.h4 Ba7 40.h5 Bb8 41.Kd3 Kb6 42.Kxe3 Kxa6
 28/53	00:01	 8,476k	5,419k	-1.18	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Rxe5+ dxe5 27.Bd7+ Kd8 28.a4 Rb8 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.h4 Ba7 40.h5 Kb6 41.Kd3 Bb8 42.Kxe3 Kxa6 43.h6 Kb6 44.Be4 Bd6 45.c7 Kxc7 46.Bxh7 Bc5+ 47.Kf4
 29/47	00:01	 9,775k	5,365k	-1.09	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Rb8 25.Bd7+ Kd8 26.Bf5 Ke8 27.Rd5 Rb5 28.Rxb5 axb5 29.Qxb4 Qxc6 30.Bd3 Qb7 31.a4 Kd7 32.Bxg6 hxg6 33.axb5 Qb6 34.Rxe5 dxe5 35.Qxf8 Qxf6 36.b4 Qe6 37.b6 Qd6 38.Qxf7+ Kc6 39.Qf3+ Kxb6 40.Qe4 g5
 30/50-	00:05	 29,487k	5,079k	-1.16	20. ... Ne5 21.Rge1
 30/51+	00:05	 29,635k	5,078k	-1.09	20. ... Ne5
 30/51	00:05	 29,890k	5,076k	-1.05	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.h4 Ba7
 31/45	00:06	 33,609k	5,021k	-1.05	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.Qc5 Rb8 29.a4 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.h4 Ba7 41.h5 Kb6 42.Be4 Kc7
 32/48-	00:07	 38,691k	4,965k	-1.12	20. ... Ne5 21.Rge1
 32/53+	00:08	 42,518k	4,947k	-1.05	20. ... Ne5
 32/53	00:09	 48,799k	4,904k	-1.03	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Kc3 e3 38.Bd5 Kc7 39.Kd3 h6 40.Be4 Ba7 41.Ke2 Kb6 42.h3 Bb8 43.Bd3
 33/56-	00:12	 60,450k	4,817k	-1.10	20. ... Ne5 21.Rge1
 33/59	00:19	 91,228k	4,644k	-1.16	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.Kd3 h6 40.h4 Ba7 41.h5 Kb6 42.Ke2 Bb8 43.Bc4 Kxc6 44.Kxe3 Kc5 45.Be2 Kd5 46.Kd3 Ba7 47.c3 Bc5 48.Bg4 Kc6
 34/54	00:21	 100,464k	4,596k	-1.11	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.Kd3 Ba7 40.h4 h6 41.h5 Kb6 42.Ke2 Kc7 43.Bf3 Kb6 44.c3 Bb8 45.Kxe3 Kxa6 46.Ke4 Kb6
 35/52	00:32	 144,749k	4,429k	-1.11	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.Kd3 Ba7 40.h4 h6 41.h5 Kb6 42.Ke2 Kc7 43.Bf3 Kb6 44.c3 Bb8 45.Kxe3 Kxa6 46.Ke4
 36/52	00:39	 171,390k	4,368k	-1.11	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.Kd3 Ba7 40.h4 h6 41.h5 Kb6 42.Ke2 Kc7 43.Bf3 Kb6 44.c3 Bb8 45.Kxe3 Kxa6 46.Ke4
 35/60	00:39	 171,390k	4,368k	-1.08	20. ... Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Bh6 25.Qxb4 Rxf6 26.Bd7+ Kd8 27.a4 Rb8 28.Rxe5 dxe5 29.Qc5 Rd6 30.Rxd6 Bf8 31.Re6 Rxb2+ 32.Kxb2 Qb8+ 33.Qb5 Qxb5+ 34.axb5 fxe6 35.bxa6 Bc5 36.Bxe6 e4 37.Bd5 e3 38.Kc3 Kc7 39.h4 Ba7 40.Kd3 h6 41.h5 Kb6 42.Ke2 Bb8 43.Bc4 Kxc6 44.Kxe3 Kb6 45.Kd4 Bg3 46.Bd3 Bf4 47.Kd5

It's not only the fact it has been faster. The most relevant fact (and most important for a chess player) is that score got propagated. This gives a player an indication of a more precise value of a position.
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Rodolfo Leoni
Posts: 545
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Location: Italy

Re: New idea for hashes

Post by Rodolfo Leoni »

giovanni wrote:I got a little bit lost, Rodolfo. Was this test done using Stockfish-TCEC6-32-PA_GT or the lastest 'savehash' Stockfish version by Daniel Jose?
It's the savehash. It can work as persistent hash too, but with some limitations.
F.S.I. Chess Teacher
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retep1
Posts: 44
Joined: Sun Aug 07, 2016 5:24 pm

Re: New idea for hashes

Post by retep1 »

two questions:
what are the limitations compared to other engines?
And should I analyze with multi-variations (f.e.: 4 ) or only one?
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Rodolfo Leoni
Posts: 545
Joined: Tue Jun 06, 2017 4:49 pm
Location: Italy

Re: New idea for hashes

Post by Rodolfo Leoni »

retep1 wrote:two questions:
what are the limitations compared to other engines?
And should I analyze with multi-variations (f.e.: 4 ) or only one?
Not compared to other engines, rather than to other persistent hashes systems. Usually, you have the main hash dedicated to search, and a PH system (if any) as an additional hash. See Critter, Spike, and other "learning" files as examples. Here, the system uses the main hashes in infinite mode only. You can understand the engine would probably be weakened if their hashes are always full when on standard games. Besides, it takes much ore time to encode an additional hash system and we should think programmers have their priorities.

For the second question, you should do your experience. I often use multiPV when I look for alternatives, then I switch to single PV for a deeper search.
Last edited by Rodolfo Leoni on Tue Aug 01, 2017 5:16 pm, edited 1 time in total.
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Chess762
Posts: 4
Joined: Fri Jul 28, 2017 11:55 am
Location: Russia

Re: New idea for hashes

Post by Chess762 »

On four CPUs I have achieved such result whithout saving the hash-file.
13: Test from Rodolfo
[d]r3kb1r/1bqn1p1p/p1Np1P2/3P4/1p6/5Q1B/PPP4P/2KR2R1 b kq - 0 1[/d]

Analysis by Stockfish 250717 64 POPCNT:

20...Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Rb8 25.Bd7+ Kd8 26.Bf5 Nxc6 27.Qe4 Qb7 28.Qe8+ Kc7 29.Qxf7+ Kb6 30.Bxg6 hxg6 31.Qxg6 Ne5 32.Qg1+ Kc7 33.Rf1 Qb6 34.Qg8 Qc6 35.h4 Qc4 36.Qg1 Qc5 37.Qxc5+ dxc5 38.f7 Rb6 39.h5 Re6 40.c3 bxc3 41.bxc3 Nd7 42.Rf2 Nf6 43.Rf5 Nd7 44.a4 Nb6 45.a5 Nc4 46.Rg1 Kd6 47.Rg8 Ke7 48.Rxc5 Kxf7 49.Rxf8+ Kxf8 50.Rxc4 Re5 51.h6 Rh5 52.h7 Rxh7 53.Kc2 Rh2+ 54.Kb3
White is better: +/- (1.17) Depth: 50/77 01:03:47 24727MN, tb=4796753
(, 01.08.2017)
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Rodolfo Leoni
Posts: 545
Joined: Tue Jun 06, 2017 4:49 pm
Location: Italy

Re: New idea for hashes

Post by Rodolfo Leoni »

Chess762 wrote:On four CPUs I have achieved such result
13: Test from Rodolfo
[d]r3kb1r/1bqn1p1p/p1Np1P2/3P4/1p6/5Q1B/PPP4P/2KR2R1 b kq - 0 1[/d]

Analysis by Stockfish 250717 64 POPCNT:

20...Ne5 21.Rge1 Rg8 22.Qf4 Bxc6 23.dxc6 Rg6 24.Kb1 Rb8 25.Bd7+ Kd8 26.Bf5 Nxc6 27.Qe4 Qb7 28.Qe8+ Kc7 29.Qxf7+ Kb6 30.Bxg6 hxg6 31.Qxg6 Ne5 32.Qg1+ Kc7 33.Rf1 Qb6 34.Qg8 Qc6 35.h4 Qc4 36.Qg1 Qc5 37.Qxc5+ dxc5 38.f7 Rb6 39.h5 Re6 40.c3 bxc3 41.bxc3 Nd7 42.Rf2 Nf6 43.Rf5 Nd7 44.a4 Nb6 45.a5 Nc4 46.Rg1 Kd6 47.Rg8 Ke7 48.Rxc5 Kxf7 49.Rxf8+ Kxf8 50.Rxc4 Re5 51.h6 Rh5 52.h7 Rxh7 53.Kc2 Rh2+ 54.Kb3
White is better: +/- (1.17) Depth: 50/77 01:03:47 24727MN, tb=4796753
(, 01.08.2017)
That's quite interesting. It discards 24. ..Bh6 in favor of 24. ..Rb8. I analyzed that PV line some years ago (until 31.Qxg6) and I concluded white is much better than 1.17. Engine probably sees black in troubles after 24. ..Bh6 25.Qxb4 Rxh6 26.Bd7+ Kd8 27.Rxe5 dxe5 28.a4
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