eval

Documentation

Index

• Constants
• Variables
• func CountMaterial(bb *dragontoothmg.Bitboards) int
• func CountPieces(b *dragontoothmg.Board) int
• func EstimateHalfmovesLeft(b *dragontoothmg.Board) int
• func Evaluate(b *dragontoothmg.Board) int16

Constants

const MaxHalfMovesLeft = 75

Used to estimate the remaining number of moves in the game

Variables

var BishopPairBonus int = 30

These are public so that they can be changed during parameter optimization

var CentralizeTable = [64]int{
	0, 0, 0, 3, 3, 0, 0, 0,
	0, 20, 20, 20, 20, 20, 20, 0,
	0, 17, 30, 30, 30, 30, 17, 0,
	3, 15, 25, 50, 50, 25, 15, 3,
	3, 15, 25, 50, 50, 25, 15, 3,
	0, 17, 30, 30, 30, 30, 17, 0,
	0, 20, 20, 20, 20, 20, 20, 0,
	0, 0, 0, 3, 3, 0, 0, 0,
}

var ConnectedRookBonus int = 16

var DefaultDrawScore int16 = 0

var DiagonalMobilityBonus int = 3

var DoubledPawnPenalty int = 6

var IsolatedPawnPenalty int = 15

var KingTableStart = [64]int{
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
	2, 2, 1, 1, 1, 1, 2, 2,
	5, 5, 3, 3, 3, 3, 5, 5,
	10, 10, 7, 7, 7, 7, 10, 10,
	20, 25, 50, 20, 25, 20, 50, 20,
}

var KnightTableStart = [64]int{
	0, 1, 3, 5, 5, 3, 1, 0,
	1, 7, 10, 15, 15, 10, 7, 1,
	3, 10, 30, 40, 40, 30, 10, 3,
	5, 15, 35, 50, 50, 35, 15, 5,
	5, 15, 30, 40, 40, 30, 15, 5,
	3, 10, 15, 20, 20, 15, 10, 3,
	1, 7, 9, 11, 11, 9, 7, 1,
	0, 1, 3, 5, 5, 3, 1, 0,
}

var OrthogonalMobilityBonus int = 6

var PassedPawnBonus int = 20

var PawnTableStart = [64]int{
	0, 0, 0, 0, 0, 0, 0, 0,
	45, 50, 50, 50, 50, 50, 50, 45,
	20, 25, 30, 35, 35, 30, 25, 20,
	10, 15, 15, 20, 20, 15, 15, 10,
	3, 5, 5, 15, 15, 5, 5, 3,
	2, 5, 3, 6, 6, 3, 5, 2,
	0, 0, 0, 0, 0, 0, 0, 0,
	0, 0, 0, 0, 0, 0, 0, 0,
}

Functions

func CountMaterial

func CountMaterial(bb *dragontoothmg.Bitboards) int

This is public so it can also be used for time managment

func CountPieces

func CountPieces(b *dragontoothmg.Board) int

func EstimateHalfmovesLeft

func EstimateHalfmovesLeft(b *dragontoothmg.Board) int

Returns an estimate of the total number of halfmoves left in the game

func Evaluate

func Evaluate(b *dragontoothmg.Board) int16

Return a static evaluation, relative to the side to move.