Initialize scores with infinity instead of arbitrarily large scores

Also remove accidentally-added hash calls
jameshochadel · Mar 13, 2021 · c39463f · c39463f
1 parent 3e2270b
commit c39463f
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Showing 2 changed files with 4 additions and 6 deletions.
diff --git a/engines/alphabeta.go b/engines/alphabeta.go
@@ -26,16 +26,15 @@ func (e *AlphaBetaEngine) alphabeta(pos *chess.Position, depth int, maxPlayer bo
 			value: e.evaluatePosition(pos),
 		}
 	}
-	pos.Hash()
 
 	bestScore := &positionScore{}
 	var comparator func(float64, float64) float64
 
 	if maxPlayer {
-		bestScore.value = -9999
+		bestScore.value = math.Inf(-1)
 		comparator = math.Max
 	} else {
-		bestScore.value = 9999
+		bestScore.value = math.Inf(1)
 		comparator = math.Min
 	}
 

diff --git a/engines/minimax.go b/engines/minimax.go
@@ -26,16 +26,15 @@ func (e *MinimaxEngine) minimax(pos *chess.Position, depth int, maxPlayer bool)
 			value: e.evaluatePosition(pos),
 		}
 	}
-	pos.Hash()
 
 	bestScore := &positionScore{}
 	var comparator func(float64, float64) float64
 
 	if maxPlayer {
-		bestScore.value = -9999
+		bestScore.value = math.Inf(-1)
 		comparator = math.Max
 	} else {
-		bestScore.value = 9999
+		bestScore.value = math.Inf(1)
 		comparator = math.Min
 	}