Search found 1017 matches

by George Tsavdaris
Fri Aug 31, 2018 12:13 pm
Forum: Computer Chess Club: General Topics
Topic: Analysis needed
Replies: 7
Views: 886

Re: Analysis needed

Vinvin wrote:
Fri Aug 31, 2018 11:57 am
Even after taking a pawn, the EGTB says it's draw :
https://lichess.org/analysis/standard/8 ... _w_-_-_1_7_
What? :D
After Nc6+ and then e5 white is winning.

I guess you misplaced the King. With King on e6, it's a draw indeed.
by George Tsavdaris
Fri Aug 31, 2018 11:54 am
Forum: Computer Chess Club: General Topics
Topic: Something goes wrong with lc0 since yesterday?
Replies: 272
Views: 40628

Re: Something goes wrong with lc0 since yesterday?

There's an interesting ongoing match between lc0 on 1 P100 and SFdev on 57 threads here: http://tcecbeta.chessdb.cn/bonusbeta/live.html So far after 11 games, SF is +1. Not counting the disconnect at the start of the 15th game, which was counted as loss for SF, after 14 games: +2 -0 =12 for SF dev....
by George Tsavdaris
Thu Aug 30, 2018 3:19 pm
Forum: Computer Chess Club: General Topics
Topic: Test position, Compliments of LC0
Replies: 26
Views: 3936

Re: Test position, Compliments of LC0

Cfish-dev finally abandons fxg3: info depth 74 seldepth 75 multipv 1 score cp 915 nodes 4431633710 nps 31170274 hashfull 945 tbhits 0 time 142175 pv f2g3 e8f7 g7f6 f7f8 c3d2 f8f7 c4c1 f7g8 c1c2 g8f7 d2c3 f7f8 f6g5 f8f7 c3b2 f7g6 g5f6 g6f7 c2f2 f7g6 b2b3 g6f7 b3c2 f7g6 c2b2 g6f7 b2b3 f7g8 f2a2 g8f7 ...
by George Tsavdaris
Thu Aug 30, 2018 8:01 am
Forum: Computer Chess Club: General Topics
Topic: Test position, Compliments of LC0
Replies: 26
Views: 3936

Re: Test position, Compliments of LC0

Houdini 6.03 Tactical does well on this position, finding Ng5 "instantly" on my XPS i9 Notebook. How does Houdini fare in this position? Avoid fxg3? that draws. Kd3 is an easy way to win(as also other moves). How do engines of 2018 do on this anticomputer one? Stockfish? Leela? My Stockfish reaches...
by George Tsavdaris
Wed Aug 29, 2018 9:20 pm
Forum: Computer Chess Club: General Topics
Topic: Something goes wrong with lc0 since yesterday?
Replies: 272
Views: 40628

Re: Something goes wrong with lc0 since yesterday?

I found this result very interesting:

Leela Lc0 11089 running on 4x P100 GPUs versus Stockfish dev 180829 running on 43 cores 16 GB hash, ended +1 -0 =9 in favor of Leela!! :?

Leela was getting 20 kN/s to 60 kN/s and Stockfish 35 MN/s to 60 MN/s !!
by George Tsavdaris
Thu Aug 23, 2018 7:56 am
Forum: Computer Chess Club: General Topics
Topic: Lc0 v0.17.0-rc1 egt test
Replies: 12
Views: 3031

Re: Lc0 v0.17.0-rc1 egt test

Could you specify which positions are these? I'm afraid i cannot do it since i don't remember now but perhaps by comparison you can do it. These are my 400 position that differ only slightly from yours: https://drive.google.com/file/d/1HXdKebIC3Is8KU11Q6Eb3jE_heh0Fkob/view So it needs more nodes to...
by George Tsavdaris
Thu Aug 23, 2018 7:37 am
Forum: Computer Chess Club: General Topics
Topic: Testposition and HUGE fail high from Stockfish!!
Replies: 32
Views: 4634

Re: Testposition and HUGE fail high from Stockfish!!

If the target is to compose positions when it happens then it is easy Here is an example from -114 to mate in 8. 2k5/ppp5/8/8/NNBK4/QQQR3q/QQQB2q1/QQQR4 b - - 0 1 Stockfish_18082021_x64_modern: 1/1 00:00 819 410k -114.55 1. ... Qhg4+ 2.Kc5 2/3 00:00 2k 771k -114.58 1. ... Qf2+ 2.Be3 3/6 00:00 3k 1,...
by George Tsavdaris
Wed Aug 22, 2018 11:01 pm
Forum: Computer Chess Club: General Topics
Topic: Testposition and HUGE fail high from Stockfish!!
Replies: 32
Views: 4634

Re: Testposition and HUGE fail high from Stockfish!!

Not sure why this is surprising. After all, White is about a Queen ahead in material. So, of course, until the search discovers the mate for Black, the evaluation will be very much in favor of White. It's not surprising i'm just saying it's rare to see such big differences, so i'm asking about any ...
by George Tsavdaris
Wed Aug 22, 2018 10:40 pm
Forum: Computer Chess Club: General Topics
Topic: Testposition and HUGE fail high from Stockfish!!
Replies: 32
Views: 4634

Testposition and HUGE fail high from Stockfish!!

In this interesting Lyudmil position, Stockfish has a huge fail high and went from +10.33 (a win for white) to -mate in 12 (black mates in 12). It had a >+8.00 eval until it found the winning move for about 1.5 billion nodes and depth 32(not too easy to get great depth in this). How other engines do...
by George Tsavdaris
Wed Aug 22, 2018 12:03 pm
Forum: Computer Chess Club: General Topics
Topic: Lc0 v0.17.0-rc1 egt test
Replies: 12
Views: 3031

Re: Lc0 v0.17.0-rc1 egt test

I seem to be misunderstanding something. How come all the engines with egt aren't getting all the problems right? These are all tablebase positions so they should essentially just be returning endgame table-base entries directly? The tested positions themselves aren't tablebase positions, i.e. they...