// Child-level negamax search function.
// Unlike NegaMax(), only returns score, not full move.
func NegaMaxChild(b *engine.Board, depth int) float64 {
if b.IsOver() != 0 || depth == 0 {
return EvalBoard(b)
}
var score float64 = LOSS
var childscore float64
for _, board := range b.NewGen() {
childscore = -NegaMaxChild(board, depth-1)
if childscore > score {
score = childscore
if score == WIN {
return score
}
}
}
return score
}
