Which engine do you think is the best in closed positions?

Discussion of anything and everything relating to chess playing software and machines.

Moderator: Ras

User avatar
Ponti
Posts: 508
Joined: Wed Mar 15, 2006 6:13 am
Location: Curitiba - PR - BRAZIL
Full name: Aloisio Ponti Lopes

Which engine do you think is the best in closed positions?

Post by Ponti »

(as june, 2016)

I don´t own a copy of Komodo, but I think Stockfish plays quite well in closed positions...
A. Ponti
AMD Ryzen 1800x, Windows 10.
FIDE current ratings: standard 1913, rapid 1931
Lyudmil Tsvetkov
Posts: 6052
Joined: Tue Jun 12, 2012 12:41 pm

Re: Which engine do you think is the best in closed position

Post by Lyudmil Tsvetkov »

Man, they can not even play well open positions.

Btw., who played 3 minutes and who 90 minutes in Komodo vs Erenburg?
Henk
Posts: 7261
Joined: Mon May 27, 2013 10:31 am

Re: Which engine do you think is the best in closed position

Post by Henk »

Lyudmil Tsvetkov wrote:Man, they can not even play well open positions.

Btw., who played 3 minutes and who 90 minutes in Komodo vs Erenburg?
Just read the book "Think like an algorithm".
Lyudmil Tsvetkov
Posts: 6052
Joined: Tue Jun 12, 2012 12:41 pm

Re: Which engine do you think is the best in closed position

Post by Lyudmil Tsvetkov »

For closed position performance, you might want to see this one:
[d]r5kr/1p1bq1b1/1Pp2n2/p1Pp4/P2Pp1p1/B3PpPp/1NN2P1P/R2QK2R w KQ - 0 1

white mates in 64 moves(128 plies).
32 moves (64 plies) until white sends a knigth to b3,bishop to c3,queen to d2 and captures black a5 pawn, and then another 32 moves(64 plies) until mate.

So, unless you have a very reliable search spanning full 128 plies, or, a very accurate eval at ply 1, above position will be unresolvable.

And indeed, engines tend to give here substantial black advantage.
royb
Posts: 581
Joined: Thu Mar 09, 2006 12:53 am

Re: Which engine do you think is the best in closed position

Post by royb »

Lyudmil Tsvetkov wrote:Man, they can not even play well open positions.

Btw., who played 3 minutes and who 90 minutes in Komodo vs Erenburg?
Erenberg had 90 minutes + 30 secs per move increment.
Komodo had 3 minutes + 1 sec per move increment.
Komodo ran on one core with no pondering.
Komodo used an opening book of only 3 moves.
Komodo was not allowed to use TBs.

Komodo won 2 (previous games) and drew the game yesterday.

If I got any of that wrong, someone will correct me, but it's what Simon (the GM commentator) said at the beginning of the game.
Lyudmil Tsvetkov
Posts: 6052
Joined: Tue Jun 12, 2012 12:41 pm

Re: Which engine do you think is the best in closed position

Post by Lyudmil Tsvetkov »

royb wrote:
Lyudmil Tsvetkov wrote:Man, they can not even play well open positions.

Btw., who played 3 minutes and who 90 minutes in Komodo vs Erenburg?
Erenberg had 90 minutes + 30 secs per move increment.
Komodo had 3 minutes + 1 sec per move increment.
Komodo ran on one core with no pondering.
Komodo used an opening book of only 3 moves.
Komodo was not allowed to use TBs.

Komodo won 2 (previous games) and drew the game yesterday.

If I got any of that wrong, someone will correct me, but it's what Simon (the GM commentator) said at the beginning of the game.
Gee, and I thought Erenburg was handicapped... :)