Search found 17552 matches

by hgm
Wed Apr 24, 2019 5:56 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: On-line engine blitz tourney April
Replies: 1
Views: 107

On-line engine blitz tourney April

The monthly on-line engine blitz tourney for April will take place on:

Saturday April 27, 3pm Boston time (21:00 Amsterdam time)

To connect:

winboard -zp -ics -icshost winboard.nl -icshelper timeseal -fcp ENGINE.exe -fd ENGINEFOLDER -autoKibitz

(for UCI engines, add -fUCI)
by hgm
Tue Apr 23, 2019 9:41 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish misevaluations:
Replies: 30
Views: 878

Re: Stockfish misevaluations:

It could be useful to look at the position at the end of the PV, to see what exactly it considers +5.38, and whether this is an obvious mis-evaluation.
by hgm
Tue Apr 23, 2019 7:44 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish misevaluations:
Replies: 30
Views: 878

Re: Stockfish misevaluations:

You could patch the eval of Stockfish a little in this particular position by scaling the stronger side down for having all pawns locked (after giving b5). The 'lantern' formation on the right is a well known 'indirectly' blocked formation. You could also put the eval at 0 (or scale it down by a fa...
by hgm
Tue Apr 23, 2019 5:14 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Chess engines for circular chess boards
Replies: 6
Views: 242

Re: Chess engines for circular chess boards

The Jocly AI should have no problems doing this. (The Jocly UI is another matter, though.) There the move generator is based on a 3d array (actually an array of arrays of arrays), graph[fromSqr][direction][range]. The 'direction' actually is an arbitrary sequence number, and for all directions all r...
by hgm
Mon Apr 22, 2019 5:00 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Chess engines for circular chess boards
Replies: 6
Views: 242

Re: Chess engines for circular chess boards

How do Rooks and Bishops move through the triangular board cell? do their trajectories bifurcate there? And how do Knight jumps work in this vicinity?
by hgm
Mon Apr 22, 2019 3:15 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish misevaluations:
Replies: 30
Views: 878

Re: Stockfish misevaluations:

With the Bishop on b5 the only Pawn you can sac is the g-Pawn, and after fxg4 black will simply put his King on f5, and white has nothing. Actually I would not be surprised if it was lost for white after such a sac.
by hgm
Mon Apr 22, 2019 2:37 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish misevaluations:
Replies: 30
Views: 878

Re: Stockfish misevaluations:

Well, what can you expect from an engine that is only good on average?
by hgm
Mon Apr 22, 2019 7:19 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Efficient capture generation in the game of Thud
Replies: 3
Views: 268

Re: Efficient capture generation in the game of Thud

Yes, I thought my example DDD-T made that clear but I guess I could have also stated it explicitly. Will have a look at that post once I find the time. Oh, sorry, I missed that. BTW, even when the distance had to be exactly the number of backing Dwarfs, efficient updating of an attack map would be ...
by hgm
Sat Apr 20, 2019 7:34 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: No standard specification for Perft
Replies: 22
Views: 456

Re: No standard specification for Perft

Well, you must be doing it wrong, if you use the same move generator for a different purpose...