Search found 148 matches

by IQ
Sat Jan 06, 2018 3:43 am
Forum: Computer Chess Club: General Topics
Topic: AlphaZero: The 10 Top Shots
Replies: 77
Views: 22366

Re: AlphaZero: The 10 Top Shots

If you don't see a difference in quality of 49...Rf8 (??) and ...Kf8, saying there wasn't any blunder, cause the position was lost anyhow, the discussion about that single one point of matter to me doesn't make any sense to me anymore, your definition of blunder is too much different from mine. :) ...
by IQ
Fri Jan 05, 2018 3:50 pm
Forum: Computer Chess Club: General Topics
Topic: AlphaZero: The 10 Top Shots
Replies: 77
Views: 22366

Re: AlphaZero: The 10 Top Shots

If this is your mainline, how does White win after e.g. 59...g5 instead of ...Qd6? As this whole Bd5 line is my invention, I feel obliged to take over. If I remember my analysis correctly, this move order is inaccurate. After 58. Rf4 Re6 you take immidiately on e6 instead of playing a5: 59. Bxe6! d...
by IQ
Thu Jan 04, 2018 11:07 pm
Forum: Computer Chess Club: General Topics
Topic: AlphaZero: The 10 Top Shots
Replies: 77
Views: 22366

Re: AlphaZero: The 10 Top Shots

thank you,Roberto, for clarifying :-) id assume that the pos with the black king on h8 is also winning but not that quickly, right !?...or is it a draw with kh8 ?...in eighter way, to make this a win for white is beyond human abilities (vs engine resistance)...the checking-sequence by white is "som...
by IQ
Thu Jan 04, 2018 6:22 pm
Forum: Computer Chess Club: General Topics
Topic: AlphaZero: The 10 Top Shots
Replies: 77
Views: 22366

Re: AlphaZero: The 10 Top Shots

originally my analysis ended in a draw but this seems to be a better approach indeed, thx for this "improvement" of a try ! Thanks that you like my Bd5 idea. [d]q5k1/8/p7/P4Q2/8/8/4KP2/8 b - - 0 1 lomosov-win or not ? White should take the last pawn on f5 with the black king on g8! Then its Mate in...
by IQ
Tue Jan 02, 2018 8:40 am
Forum: Computer Chess Club: General Topics
Topic: AlphaZero: The 10 Top Shots
Replies: 77
Views: 22366

Re: AlphaZero: The 10 Top Shots

peter wrote:fully lost the game (game 3) was not until 49...Rf8(?), with Kf8 instead, Black would have had to fight hard too, but maybe the half point could have been saved yet still.
No, this is wrong. The Position is also lost after Kf8. See the analysis in the alphazero game 3 thread.
by IQ
Thu Dec 28, 2017 7:06 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Search traps in MCTS and chess
Replies: 19
Views: 7942

Re: Minmax backup operator for MCTS

Using a minmax backup operator seems to perform much better than an averaging backup operator. The latter is used in AlphaZero but I think the minmax backup operator maybe better for Chess. The scores are much more stable with the minimax operator and also it seems to be better in solving tactics. ...
by IQ
Wed Dec 20, 2017 11:52 am
Forum: Computer Chess Club: General Topics
Topic: AlphaZero - Stockfish game 3
Replies: 33
Views: 10129

Re: AlphaZero - Stockfish game 3

SF is clearly confused in this position. She is an exchange + 2 pawns ahead, yet is smart enough to know that White has at least compensation so displays 0.00. I am afraid that SF is not "smart" enough to see the compensation but rather "blind" enough to not see how white makes progress and thus co...
by IQ
Tue Dec 19, 2017 2:16 pm
Forum: Computer Chess Club: General Topics
Topic: AlphaZero - Stockfish game 3
Replies: 33
Views: 10129

Re: AlphaZero - Stockfish game 3

4rk1q/p2prp1p/5RpP/2p5/7Q/1B4P1/P4PK1/8 w - - 0 50 50. Bd5 Rc8 51. Qf4 Qg8 52. Qa4 d6 53. Qa6 Rd8 From depth 40 to about depth 50 (sometimes later), SF says 0.00, then at depth 51 the eval starts creeping up: 0.14, 0.56, 1.13, 1.72, until depth 51 is completed. The best move is 54. Qa5. I cleared h...
by IQ
Tue Dec 19, 2017 1:00 pm
Forum: Computer Chess Club: General Topics
Topic: AlphaZero - Stockfish game 3
Replies: 33
Views: 10129

Re: AlphaZero - Stockfish game 3

It was a nice find Roberto. Kaissa thinks it might just be enough too. Full Bishop against two pawns. But a piece is a piece. I think I saw 50...Qg8 is not totally forced at the beginning (not Sf's first choice) of your variation so you'd have to investigate the alternatives there but that might no...
by IQ
Tue Dec 19, 2017 11:21 am
Forum: Computer Chess Club: General Topics
Topic: AlphaZero - Stockfish game 3
Replies: 33
Views: 10129

Re: AlphaZero - Stockfish game 3

What happens after 55..Qxh6. Have you tried to win this position with the help of any software you like against Stockfish set to a fair time control. I would love to see A0 resume this game at a future date after SF is given the chance to play 49..Kf8. Just follow my plan. 55. ... Qxh6 56. Rf3 f5 (...