diff --git a/Stockfish/NSBezierPath+Arrowhead.m b/Stockfish/NSBezierPath+Arrowhead.m
index 67b1f83..143064f 100644
--- a/Stockfish/NSBezierPath+Arrowhead.m
+++ b/Stockfish/NSBezierPath+Arrowhead.m
@@ -44,11 +44,6 @@ + (NSBezierPath *)bezierPathWithArrowFromPoint:(CGPoint)startPoint
     
     [path moveToPoint:points[0]];
     for (int i = 0; i < kArrowPointCount; i++) {
-        if (isnan(points[i].x) || isnan(points[i].y)) {
-            // we have a problem.
-            NSLog(@"Returning empty bezier path");
-            return [NSBezierPath bezierPath];
-        }
         [path lineToPoint:points[i]];
     }
     
diff --git a/Stockfish/SFMArrowView.mm b/Stockfish/SFMArrowView.mm
index 647b1fb..dedebd1 100644
--- a/Stockfish/SFMArrowView.mm
+++ b/Stockfish/SFMArrowView.mm
@@ -19,6 +19,10 @@ @implementation SFMArrowView
 
 - (void)drawRect:(NSRect)dirtyRect
 {
+    if (self.fromSquare == self.toSquare) {
+        return;
+    }
+    
     [[NSColor colorWithRed:1 green:0 blue:0 alpha:0.5] set];
     
     CGFloat arrowLineWidth = self.squareSideLength * ARROW_LINE_WIDTH_AS_PERCENT_OF_SQUARE_WIDTH;
diff --git a/Stockfish/stockfish-64 b/Stockfish/stockfish-64
index f1000c6..deafa0e 100755
Binary files a/Stockfish/stockfish-64 and b/Stockfish/stockfish-64 differ
diff --git a/Stockfish/stockfish-sse42 b/Stockfish/stockfish-sse42
index 4973243..a7b07b2 100755
Binary files a/Stockfish/stockfish-sse42 and b/Stockfish/stockfish-sse42 differ