Search found 2243 matches

by peter
Sun Apr 11, 2021 4:05 pm
Forum: Computer Chess Club: General Topics
Topic: Unusual imbalance
Replies: 7
Views: 403

Re: Unusual imbalance

Lc0 defeated Ethereal with suffice time control in the fabricated position with black rook on c8. I'll retry with black rook on h8 as in the real game. Maybe you should rather give it a try with 19.Rge1 instead of Qd2(?!). After the textmove the position is only seemingly (as for counting material ...
by peter
Sat Apr 10, 2021 3:39 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish "busts" another test position, maybe.
Replies: 4
Views: 362

Re: Stockfish "busts" another test position, maybe.

It looks like Stockfish has found a solution to a position that was thought to be a fortress a few years ago. It finds a different key move that it seems to think wins. Here is the position that was posted in this forum about 4 years ago where the key move was thought to be 1.Nxc7: 8/2p2kb1/np1p2p1...
by peter
Fri Apr 09, 2021 5:10 am
Forum: Computer Chess Club: General Topics
Topic: Unusual imbalance
Replies: 7
Views: 403

Re: Unusual imbalance

2r1k3/1b1nbpp1/p2ppn2/1p5p/4P3/P4PP1/1PP1Q2P/1K1R2R1 w - - 0 20 Interesting test position for most engines! [Event "Chess24 Legends of Chess Final 4"] [Site "https://lichess.org/65pCJz1c"] [Date "2020.07.30"] [Round "1.1"] [White "Carlsen, Magnus (2881)"] [Black "Svidler, Peter (2742)"] [Result "1/...
by peter
Thu Apr 08, 2021 1:25 pm
Forum: Computer Chess Club: General Topics
Topic: Maybe it's difficult for engines
Replies: 56
Views: 2600

Re: Maybe it's difficult for engines

---, but of course as long as you continue making the triangle eventually I will run out of moves with my f and h pawn and I will be force move my Black Bishop and eventually you will activate your Knight... Triangulation only with the King till Black runs out of pawn- moves, is the longer way then...
by peter
Thu Apr 08, 2021 12:04 pm
Forum: Computer Chess Club: General Topics
Topic: Maybe it's difficult for engines
Replies: 56
Views: 2600

Re: Maybe it's difficult for engines

N3Kbk1/4p1p1/4PpPp/b7/8/8/5p1p/5Nbr w - - 5 2 For example if the position reach a point where the White King has to move to d7 then I move my Black king to h8, but never any of my movable pawns :roll: Then you have to make a triangle maneuvre with the white King to reach e8 again with black King at...
by peter
Tue Apr 06, 2021 5:28 pm
Forum: Computer Chess Club: General Topics
Topic: Maybe it's difficult for engines
Replies: 56
Views: 2600

Re: Maybe it's difficult for engines

Paloma wrote:
Tue Apr 06, 2021 4:56 pm
peter wrote:
Tue Apr 06, 2021 10:01 am
....
If you understood this one maneuvre (which I have to admit, I didn't see by myself for a while neither) you know, why the whole study is a forced win of Black's.
...
??
forced win for White !
Of course!
:D
by peter
Tue Apr 06, 2021 10:01 am
Forum: Computer Chess Club: General Topics
Topic: Maybe it's difficult for engines
Replies: 56
Views: 2600

Re: Maybe it's difficult for engines

1. Qxa1 Nb3+ 2. Kc4 Nxa1 3. Kc3 Bxa5+ 4. Kb2 Kg8 5. Kxa1 Kh8 6. Kb2 Kg8 7. Kb3 Kh8 8. Kc4 Kg8 9. Kc5 Kh8 10. Kd5 Kg8 11. Kc6 Kh8 12. Kd7 Kg8 13. Ke8 h5 14.Kd7 is mate in 50 N3Kbk1/4p1p1/4PpP1/b6p/8/8/5p1p/5Nbr w - - 0 1 Analysis by Stockfish-MOJO 281120: 14.Kd7 Kh8 15.Kc6 h4 16.Kd5 Bd8 17.Ke4 Kg8 1...
by peter
Sun Apr 04, 2021 4:16 pm
Forum: Computer Chess Club: General Topics
Topic: Maybe it's difficult for engines
Replies: 56
Views: 2600

Re: Maybe it's difficult for engines

So this puzzle is much more difficult than I thought. I got a #59 by myself at first, then I tried to use some of my engines to verified my solution but they all failed to solve the puzzle. Then, I posted it here and... I shouldn't have doubted it from the very start to work at all, maybe if you wo...
by peter
Sat Apr 03, 2021 6:36 am
Forum: Computer Chess Club: General Topics
Topic: Maybe it's difficult for engines
Replies: 56
Views: 2600

Re: Maybe it's difficult for engines

It looks like if white times it right, Ke8 and black is in Zugzwang. So it is. Real problem is, before that works, white Knight at a8 has to be set free with cyclic zugzwang maneuvres of its own, because capturing Bishop f8 after single one free black Bishop is exchanged to soon against this one Kn...
by peter
Fri Apr 02, 2021 8:18 pm
Forum: Computer Chess Club: General Topics
Topic: Maybe it's difficult for engines
Replies: 56
Views: 2600

Re: Maybe it's difficult for engines

I think that Nb6 instead of Kc6 may be pivotal here (which, in itself, makes this position an exquisite problem): N4bk1/4p1p1/4PpPp/b1K5/8/8/5p1p/5Nbr w - - acd 50; bm Nb6; ce 1036; c3 "Kc6"; pm Nb6; pv Nb6 Bc3 Kc6 Bb2 Nd7 Be5 Kb7 Bc3 Kc7 Ba5+ Kc8 h5 Kb7 Bc3 Kc7 Ba5+ Kc8 h4 Kb7 Bd2 Kc7 Ba5+ Kc8 h3 ...