Search found 1691 matches

by peter
Fri Apr 12, 2019 8:00 am
Forum: Computer Chess Club: General Topics
Topic: Middlegame positional test-suite
Replies: 18
Views: 1375

Re: Middlegame positional test-suite

Hi Jon! Do this qualify as test position? r2q2k1/p1p3pp/2p5/3p1b2/8/2P2N2/PP3KPP/R1B2B1R b - - 0 14 I don't see so much difference between ...Qb8, ...Rb8, and ...a5, just to give some more possible candidate moves besides the "single one game changing". If this doesn't fit as definition of "position...
by peter
Fri Apr 05, 2019 5:44 am
Forum: Computer Chess Club: General Topics
Topic: Mate in 82?
Replies: 21
Views: 1233

Re: Mate in 82?

Eventually, I am going to write an AND/OR depth first proof search search using GPUs, but that is a project for when I retire, I think. Olaf Jenkner's Gustav (3.3, not the latest one anymore, as far as I know) gives solution in 51 seconds with automtic parameters, only given 82 moves to search for....
by peter
Thu Apr 04, 2019 4:05 pm
Forum: Computer Chess Club: General Topics
Topic: Mate in 82?
Replies: 21
Views: 1233

Re: Mate in 82?

Hi! What am I missing? :? :oops: I don't see any way to force the black king off the c-file w/o dropping the d3 pawn (which appears to actually loose!) It's Cyclic Zugzwang, try for help komodo 12.3, if you have, or look at line to mate to get the fine trick: [Event "#82"] [Site "Talkchess"] [Date "...
by peter
Thu Apr 04, 2019 3:55 pm
Forum: Computer Chess Club: General Topics
Topic: Mate in 82?
Replies: 21
Views: 1233

Re: Mate in 82?

Hi Steve! Amazingly Komodo 12.3 announces mate in 82 after 44 seconds on my relatively fast laptop (i9)! Note there wasn't any forward and backward analysis. I did a clean restart of the Shredder GUI. Here's the output: 8/1p1p2p1/5p1p/5P1P/1p1p1P2/pP1P1P2/P1k1B3/4K3 w - - Engine: Komodo 12.3 64-bit ...
by peter
Wed Mar 27, 2019 8:10 am
Forum: Computer Chess Club: General Topics
Topic: SugaR MCTS Learning (New)
Replies: 9
Views: 1466

Re: SugaR MCTS Learning (New)

Thanks, these games were from the position with bishops and knights swapped at the beginning! Trying it now from a regular line and it is generating several learning files. Also note there is an update since the link in the first post see https://github.com/Zerbinati/SugaR/tags The only shame is it...
by peter
Wed Mar 27, 2019 7:01 am
Forum: Computer Chess Club: General Topics
Topic: SugaR MCTS Learning (New)
Replies: 9
Views: 1466

Re: SugaR MCTS Learning (New)

Thanks for the help! Played a few games and it created an experience.bin file but it was size 0. To get more .bin- files (8 with experience.bin normally) and see it grow (yet very slowly) you always have to have the full move history leading to the position to start playing or analysing from. As fa...
by peter
Sun Mar 24, 2019 8:00 pm
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 37
Views: 1508

Re: Revisiting g5 (Tough Tactical Test Position?)

Hi Louis! -2.13 1... Rg8 2. Bd1 g5 3. hxg5 Nxg5 4. Qd3 Nf6 5. Nxg5 Rxg5 6. Bf3 Bg4 7. Kf1 Qd7 8. bxa5 bxa5 9. c5 h4 10. Ke2 Nxe4 11. Qxe4 Bf5 12. Qc4 e4 13. Bc3+ Kh7 14. Kd2 Rxg2 15. Bxe4 f3+ 16. Kd1 Re8 17. Nxd6 cxd6 18. Rb7 Qxb7 19. Bxf5+ Kg8 20. Be6+ Kf8 21. c6 Qh7 22. c7 Rg1+ 23. Be1 Qh8 24. Rb...
by peter
Sat Mar 23, 2019 9:37 pm
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 37
Views: 1508

Re: Revisiting g5 (Tough Tactical Test Position?)

Hi Louis! -2.13 1... Rg8 2. Bd1 g5 3. hxg5 Nxg5 4. Qd3 Nf6 5. Nxg5 Rxg5 6. Bf3 Bg4 7. Kf1 Qd7 8. bxa5 bxa5 9. c5 h4 10. Ke2 Nxe4 11. Qxe4 Bf5 12. Qc4 e4 13. Bc3+ Kh7 14. Kd2 Rxg2 15. Bxe4 f3+ 16. Kd1 Re8 17. Nxd6 cxd6 18. Rb7 Qxb7 19. Bxf5+ Kg8 20. Be6+ Kf8 21. c6 Qh7 22. c7 Rg1+ 23. Be1 Qh8 24. Rb1...
by peter
Sat Mar 23, 2019 12:03 pm
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 37
Views: 1508

Re: Revisiting g5 (Tough Tactical Test Position?)

Following your line on Rg8 up to Bxd2, white's cxb6 could be a mistake because of Qxh4 immediately, even giving up the B at D2. [Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [FEN "r1bq1r1k/2pn3n/1p1p2pb/pN1Pp2p/1PP1Pp1P/P4N2/2BBQPP1/RR4K1 b - - 0 1"] [S...
by peter
Sat Mar 23, 2019 8:35 am
Forum: Computer Chess Club: General Topics
Topic: Revisiting g5 (Tough Tactical Test Position?)
Replies: 37
Views: 1508

Re: Revisiting g5 (Tough Tactical Test Position?)

Using your stored lines, I found two things of note: In this position, the opponent's move in your line is Bf1, but Bc2 is much stronger: 2b1n1r1/r3k3/1p6/3PP3/P1P2p2/3B1P1p/5K1R/R7 w - - acd 43; acs 1410; bm Bc2; c3 "Bf1"; ce -187; pm Bc2; pv Bc2; In this position, the opponent's move in your line...