In chess, the chess piece relative value system conventionally assigns a point value to each piece when assessing its relative strength in potential exchanges. These values are used as a heuristic that helps determine how valuable a piece is strategically. They play no formal role in the game but are useful to players, and are also used in computer chess to help the computer evaluate positions.

Calculations of the value of pieces provide only a rough idea of the state of play. The exact piece values will depend on the game situation, and can differ considerably from those given here. In some positions, a well-placed piece might be much more valuable than indicated by heuristics, while a badly-placed piece may be completely trapped and, thus, almost worthless.

Valuations almost always assign the value 1 point to pawns (typically as the average value of a pawn in the starting position). Computer programs often represent the values of pieces and positions in terms of 'centipawns', where 100 centipawns = 1 pawn, which allows strategic features of the position, worth less than a single pawn, to be evaluated without requiring fractions.

http://en.wikipedia.org/wiki/Chess_piece_relative_value
http://home.comcast.net/~danheisman/Articles/evaluation_of_material_imbalance.htm

IvanHoe T50 , T0.5.x Versions pieces values
pawn = 100
knight = 350
bishop = 350
rook = 500
queen = 1000

I believe we (Anyone interested in chess in the world) did not find yet the best Material value for the pieces

Yes Ahmed,
great truth..

although it would be interesting to be able to express a more positional game
:sm86:
engines programs very tactical and strategic
Richard Lang I remember .. In early versions dos gui
is able to express a great positional game
You agree?

if you have two engines one very good in tactical play and the other good in positional play
i think the engine with positional play will win
but in my side I like be there a balance between positional play and tactical play

Ahmed wrote:IvanHoe T50 , T0.5.x Versions pieces values
pawn = 100
knight = 350
bishop = 350
rook = 500
queen = 1000

:sm2:

:scratch: :scratch: :scratch:

Ahmed wrote:I believe we (Anyone interested in chess in the world) did not find yet the best Material value for the pieces

i agree

The piece values a computer uses the following sort of scoring algorithm

Queen = 9 points
Rook = 5 points
Bishop = 3 points
Knight = 3 points
Pawn = 1 point
King = Between 41 and 200 points - this varies from computer to computer, but it needs to be large enough so that it isn't exchanged off by mistake.



:study: :study: :pale: :study: :study:

:sm22:

Ahmed wrote:Material value Project
we work on new Project to find the best Material value
so if any compiler or tester interested in joining our group just send P.M to me
Best Regards
Ahmed

good idea

IvanHoe T0.5.4.1 pieces values
pawn = 90
knight = 280
bishop = 280
rook = 440
queen = 810

pawn = 80
knight = 310
bishop = 310
rook = 480
queen = 900

trey this ahmed in 5.2 this has helped in the t55a for me.

but the pawn is Very few In relation to the other Pieces
the ratio must be Balanced to don't get a weakness point in the play
any way i will try this values
thanks

:sm67: ahmed
:sm66:

and about rybka 4 Materials values
Rybka 4 x64 Exp. 42

White Pawn cp=3
Black Pawn cp=2
White Knight cp=10
Black Knight cp=8
White King Bishop cp=10
Black King Bishop cp=8
White Queen Bishop cp=10
Black Queen Bishop cp=8
White Rook cp=17
Black Rook cp=13
White Queen cp=39
Black Queen cp=33