Search found 75 matches

by Raphexon
Wed Aug 21, 2019 9:54 am
Forum: Computer Chess Club: General Topics
Topic: Interesting Chess Math/Simulation Problem
Replies: 4
Views: 278

Re: Interesting Chess Math/Simulation Problem

It would likely be very/extremely trivial to prove the side with the iron queen can force a win.
by Raphexon
Mon Aug 19, 2019 6:18 pm
Forum: Computer Chess Club: General Topics
Topic: buying a new computer
Replies: 208
Views: 14828

Re: buying a new computer

What does I/O and memory channel mean? How does it benefit chess engines? More memory channels means that more data can travel between CPU and RAM in a given amount of time. So, for chess engines, reading information from the hash table becomes faster, for example. L3 caches of 1gb thanks to RLDRAM...
by Raphexon
Sat Aug 17, 2019 4:18 pm
Forum: Computer Chess Club: General Topics
Topic: when is a win a win and a draw a draw
Replies: 14
Views: 460

Re: when is a win a win and a draw a draw

After using a calculator and letting my pi run for 48 hours I don't think it will ever find it.
It can't see that it has no way of winning and calculating every possible move (At least 7^25) would take way too long.
by Raphexon
Fri Aug 16, 2019 10:02 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Faster testing ?
Replies: 10
Views: 518

Re: Faster testing ?

Ok I get your point but i'd be curious to see some stats on the subject (match lenght, tpye of draws...). Sudden-death matches can also suffer from blunder in end game or failure to find a mate sequence being too short on time and living on a small increment... I guess I shall work on sudden death ...
by Raphexon
Thu Aug 15, 2019 10:59 pm
Forum: Computer Chess Club: General Topics
Topic: Mean Girl 7
Replies: 7
Views: 405

Re: Mean Girl 7

Thanks, I love small nets.
by Raphexon
Thu Aug 15, 2019 2:17 pm
Forum: Computer Chess Club: General Topics
Topic: when is a win a win and a draw a draw
Replies: 14
Views: 460

Re: when is a win a win and a draw a draw

Note that I do not know about a single engine that can detect when a draw is a draw(that means no possible mate for the opponent) stupid Stockfish even cannot evaluate obvious draw chess positions by the chess rules as 0.00 and I do not believe there is a chess server that is going to give you a dr...
by Raphexon
Wed Aug 14, 2019 5:32 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Poor performance of Stockfish 10 against Igel 1.8.3 at (shallow) fixed depth=10
Replies: 7
Views: 1216

Re: Poor performance of Stockfish 10 against Igel 1.8.3 at (shallow) fixed depth=10

Igel prunes less than Stockfish so it shouldn't be a surprise it's stronger at a fixed depth. Stockfish reaches the same depth in (much) less time. And from what I've tested with Igel in the past, its insanely slow at reaching even modest (displayed) depths so it being a monster at fixed depth isn't...
by Raphexon
Tue Aug 13, 2019 6:07 pm
Forum: Computer Chess Club: General Topics
Topic: Out of the Kai 450 positions, 99 not found by SF
Replies: 74
Views: 2479

Re: Out of the Kai 450 positions, 99 not found by SF

What is a good long think?

I'm going to test "1bqrr1k1/1p3p1p/p1p5/2Nn1pp1/1P1P2b1/P3P1P1/2QN1P1P/R3RBK1 w" overnight with my Raspberry Pi3B.

Maybe it will find Qb2.
by Raphexon
Mon Aug 12, 2019 6:25 am
Forum: Computer Chess Club: General Topics
Topic: 237 Mn/s for Stockfish on an 2xEPYC 7742
Replies: 20
Views: 1022

Re: 237 Mn/s for Stockfish on an 2xEPYC 7742

Surpassing Deep Blue's 200 Million nps. But 22 years later... But now, Stockfish at 1 Mn/s is stronger than Deep Blue at 200 Mn/s. 8-) Stockfish at 1 kn/s is stronger than Deep Blue. Is it? I’m not sure that’s right Stockfish should be GM level even at 100 n/s classical time control.