Hello,

I need help.

I want to contact an administrator of talckess because I no longer have access. When I'm trying to connect to talkchess.com, I get "You don't have permission to access / on this server".

Thank you,

8/1p4bP/2k5/P1P1pp2/2K5/5p2/5P2/2B5 w - - 37 85

My engine considers this position as a wining with +1.81.

After many moves, and near the 50 moves (without captures nor pawn moves), it sacrifies de the c4 pawn to preserve its advantage and the score drops to 0.62.

Bis repetita, after many moves ...

Hello,

My engine is very hard to tune because of its Sensitivity.
When I change a single value (for example square F3 of PST knight from 5 to 6 or 4), I note a big impact on bahaviour of my engine for certain tactical position.

Is this normal or is this the sign of the existence of a hidden ...

Bonjour,
I want to add some endgame knowledge in my engine like KRP_kr but I face a problem that's fundamental.
The knowledge says : if white is to move and condition1, white draws => but this breaks the symmetry of evaluation and causes problem when reusing the eval after null move.

What can I do ...

Thank you for the response.

Yes, there is some games that terminate with "White's connection stalls".
But there is another problem, tc is 10+0.5 and the game starts with 1. Bf3 {+0.20/11 0.69s} => how the time jumped from 10s to 69s.

[Event "?"]
[Site "?"]
[Date "2015.11.24"]
[Round "1"]
[White ...

Hello,
First, sorry for bad englsih.

I'm faced to strange behaviour when testing my experimental engine.
I lunch the same test (same conditions) under cuteches-cli and Arena and the result was totally different.
With cutechess-cli, it loses => 70%
With arena, it wins => 90%.

This the cutechess-cli ...

lucasart, for you time-acces is the same for array of 1-dimension, array of 2-dimension and direct variable.

But, I think that using variable KNIGHT_white is faster than b_white[KNIGHT] and b[WHITE][KNIGHT].

1/
Consider the folowing date structure :
typedef struct {
uint64_t w_bitboard[6];
uint64_t b_bitboard[6];
...
} BB;
With
- w_bitboard[1] for white pawn bitboard
- w_bitboard[2] for white knight bitboard
- w_bitboard[3] for white bishop bitboard
- w_bitboard[4] for white rook bitboard
- w ...

Replace :
int temp = -searchToDepth( depth + 3, -alpha, -beta, Null_Move_Not_Allowed );

with :
int temp = -searchToDepth( depth - 3, -beta, -alpha, Null_Move_Not_Allowed );

You can use another chess engine as mentor as described in "Genetic Algorithms for Mentor-Assisted Evaluation Function Optimization".