Search found 16819 matches

by bob
Thu Sep 12, 2019 3:02 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Crafty 25.3 MSVS 2019
Replies: 32
Views: 5515

Re: Crafty 25.3 MSVS 2019

while Joshua and I try to get 25.3 cleaned up for windows, here is a windows question. In gcc (linux / macos) or clang (macOS) we have three bit manipulation intrinsics: # define PopCnt(v) __builtin_popcountll(v) # define LSB(v) __builtin_ctzll(v) # define MSB(v) (63 - __builtin_clzll(v)) For window...
by bob
Wed Sep 11, 2019 7:21 pm
Forum: Computer Chess Club: General Topics
Topic: Father versus Deepblue in the ocean. September 04/2019.. Open letter to Garry Kasparov
Replies: 24
Views: 2360

Re: Father versus Deepblue in the ocean. September 04/2019.. Open letter to Garry Kasparov

September 04, 2019 Open letter to Garry Kasparov. Deep blue was a part of a crucial moment in the history of mankind. The great and great Gary Kasparov faced the power of the machine and economic corporations. The role played by the world champion was extraordinary. Today I wonder if the valuation ...
by bob
Wed Sep 11, 2019 3:39 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Back To The Beginning
Replies: 35
Views: 6286

Re: Back To The Beginning

thought I would reply out of interest. On my 2 year old MacBook, 2.2ghz i7 circa 2017 I see this number for perf 6 from start position: White(1): perft 6 total moves=119060324 time=3.11 White(1): Here's the next one: White(1): perft 7 total moves=3195901860 time=82.65 My perft was never optimized fo...
by bob
Tue Sep 10, 2019 9:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Crafty 25.3 MSVS 2019
Replies: 32
Views: 5515

Re: Crafty 25.3 MSVS 2019

It looks like that typedef is backward. IE typedef bool uint8_t; was probably intended. No idea since I didn't write that code...

let me know how you want me to send the source and I'll send you a .zip to try...
by bob
Tue Sep 10, 2019 4:08 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Crafty 25.3 MSVS 2019
Replies: 32
Views: 5515

Re: Crafty 25.3 MSVS 2019

OK, a few notes. (1) the stdatomic.h error requires the definition of _cplusplus which I assume is a windows thing. Note that this changed since I went to the new syzygy support code that Ronald pointed me to. If that is defined, then it includes atomic.h which I assume (again) is a windows thing......
by bob
Sun Aug 18, 2019 5:49 pm
Forum: Computer Chess Club: General Topics
Topic: Where did all these 3400 engines come from?
Replies: 40
Views: 5449

Re: Where did all these 3400 engines come from?

But do they play really chess ? I mean, do they have a plan or do they make moves that do not lose material?! Well, they don't usually lose material to shallow tactics. The NN engines used to do that but they have improved to the point where mostly they don't. All these programs rely on heuristics:...
by bob
Sat Aug 17, 2019 10:07 pm
Forum: Computer Chess Club: General Topics
Topic: when is a win a win and a draw a draw
Replies: 15
Views: 1784

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

Bob you are right the position is illegal my mistake. The point was unless a position is 100% certain that its a draw then just because black only has a knight doesn't foot the bill. To me only 2 kings and a bishop or 2 kings and a knight I think are the only 2 scenarios guaranteed a draw. Uri only...
by bob
Sat Aug 17, 2019 1:31 am
Forum: Computer Chess Club: General Topics
Topic: Congrats the Komodo Team
Replies: 32
Views: 4014

Re: Congrats the Komodo Team

that is actually pretty amazing numbers...
by bob
Thu Aug 15, 2019 4:41 am
Forum: Computer Chess Club: General Topics
Topic: when is a win a win and a draw a draw
Replies: 15
Views: 1784

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

This is a sticky wicket in the FIDE rules. Technically even a KB vs KB is winnable by FIDE rules since black could put his king on H8, his bishop on H7, white could have his king on F8 and moves his bishop to the a1-h8 diagonal. Nobody would play that bishop to h7 of course, but the rules... Chess s...
by bob
Wed Aug 14, 2019 6:54 pm
Forum: Computer Chess Club: General Topics
Topic: Does computer chess sponsorship exist?
Replies: 24
Views: 3219

Re: Does computer chess sponsorship exist?

According to talkchess posts, Houdini was sponsored by an Arab Sheikh. I don't have any direct knowledge of that. I thought that was Hydra. They did that one too. Don't think it was Houdini. It was a program by Chrilly Donninger. Houdini has not participated in the usual computer chess tournaments,...