Search found 602 matches

by chrisw
Tue Aug 20, 2019 8:10 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: What the heck happens here?
Replies: 12
Views: 682

Re: What the heck happens here?

I took the Sim tester which has some 8,000+ quiet positions with unclear best move and tested engines, including versions of Lc0 nets, all at 1 second / position and additionally SF_dev at much longer 10s/position and 30s/poisition. Also, for some check, one Lc0 at 0.2s/position. Hardware: 4 i7 cor...
by chrisw
Fri Aug 16, 2019 9:26 am
Forum: Computer Chess Club: General Topics
Topic: Nh4 is hard to find, but the stats will tell you it is right
Replies: 17
Views: 1595

Re: Nh4 is hard to find, but the stats will tell you it is right

[d]r3k2r/ppqbnppp/2n1p3/1B1pP3/P1pP4/2P2N2/2PB1PPP/R2Q1RK1 w kq - acd 43/61; acs 6451 ; acn 49590987888; ce 18 ; bm Nh4; pv Nh4 O-O Qg4 Ng6 Nxg6 fxg6 Bc1 Rf5 Bxc6 Bxc6 a5 a6 f4 Bb5 Re1 Qd8 h3 Qc7 Bb2 Re8 Reb1 Qf7 Rf1 Qc7 g3 b6 axb6 Qxb6 Rfb1 a5 Kg2 Rf7 Ba3 a4 h4 Qa5 Bd6 Bc6 Ra3 Rb7 Rxb7 Bxb7 Bb4 Qb...
by chrisw
Wed Aug 14, 2019 9:12 am
Forum: Computer Chess Club: General Topics
Topic: 'Deus X' Unveiled as FAT FRITZ PROJECT...
Replies: 44
Views: 2467

Re: 'Deus X' Unveiled as FAT FRITZ PROJECT...

You dreamed that bit of libelous BS up. TCEC cooked up some seriously odd rules, though, to prevent third party nets from entering with the lc0 net container. What is "Lc0 net container"? "DeusX" was Lc0 binary, Lc0 neural network architecture and implementation, trained with Lc0 scripts (so the on...
by chrisw
Mon Aug 12, 2019 9:25 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Bitboard logic: identifying 4 squares in a block
Replies: 8
Views: 514

Re: Bitboard logic: identifying 4 squares in a block

The board can be any size? What kind of bitboards are those? Can the code not even assume a particular board size? So I'm not really sure what you mean, but I'll just focus on chess. Shouldn't this work (in SF terminology): bool has_square(bitboard b) { b &= shift<EAST>(b); b &= shift<NORTH>(b); re...
by chrisw
Mon Aug 12, 2019 8:49 am
Forum: Computer Chess Club: General Topics
Topic: 237 Mn/s for Stockfish on an 2xEPYC 7742
Replies: 20
Views: 1010

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

Werewolf wrote:
Sun Aug 11, 2019 7:59 pm
Surpassing Deep Blue's 200 Million nps.

But 22 years later...
also, just for reference, first microprocessor chess programs, Z80, 6502, back in 1980, 1981 were doing around 300 nps.

Factor of about a million in 40 years by general purpose CPU/software combination.
by chrisw
Mon Aug 12, 2019 8:29 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Bitboard logic: identifying 4 squares in a block
Replies: 8
Views: 514

Re: Bitboard logic: identifying 4 squares in a block

Let me elaborate. - - - - - - - - x x - - - - - x x - - - - - - - - - - - - - - - - - - The diagram above shows 4 'on' bits adjacent to each other in the shape of a square. There might be additional bits "touching" these four, the test is, is there ANY 4 bits in this pattern. Mobmat wrote earlier p...
by chrisw
Fri Jul 26, 2019 10:36 am
Forum: Computer Chess Club: General Topics
Topic: GPU recommendation needed
Replies: 13
Views: 970

Re: GPU recommendation needed

What would be good would be for CPU and GPU to be able to share the same RAM, also to be on the same chip. Yes, there are different approaches for shared memory and lower latency, e.g. https://en.wikipedia.org/wiki/Coherent_Accelerator_Processor_Interface I guess with the upcoming Exa-FLOP super co...
by chrisw
Fri Jul 26, 2019 8:08 am
Forum: Computer Chess Club: General Topics
Topic: GPU recommendation needed
Replies: 13
Views: 970

Re: GPU recommendation needed

What would be good would be for CPU and GPU to be able to share the same RAM, also to be on the same chip. Yes, there are different approaches for shared memory and lower latency, e.g. https://en.wikipedia.org/wiki/Coherent_Accelerator_Processor_Interface I guess with the upcoming Exa-FLOP super co...
by chrisw
Fri Jul 26, 2019 7:17 am
Forum: Computer Chess Club: General Topics
Topic: GPU recommendation needed
Replies: 13
Views: 970

Re: GPU recommendation needed

I have a dual-Xeon system with 2 Intel Xeon E5-2686-V3 cores or 2 X 18 = 36 cores total. I would like to add a decent GPU card so as to test lc0 but not reach for the top (GTX 2080). What would be recommended in terms of a value purchase: GTX 2070; GTX 2070S; or is there an AMD GPU I should look at...
by chrisw
Thu Jul 25, 2019 6:47 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Model to C code converter
Replies: 0
Views: 734

Model to C code converter

Anyone tried this out? Looks useful if it works. https://www.aitransformer.com/ What is AI Transformer? The journey of an AI project is an iterative one. Developers use high-level languages like Python to quickly prototype and test models, but need to convert to C code for deployment to the real wor...