Update 51_node.js

rooklift · May 22, 2020 · 3b34c41 · 3b34c41
1 parent 4a72edd
commit 3b34c41
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/51_node.js b/src/51_node.js
@@ -173,6 +173,8 @@ const node_prototype = {
 
 	is_triple_rep: function() {
 
+		// Are there enough ancestors since the last pawn move or capture?
+
 		if (this.board.halfmove < 8) {
 			return false;
 		}
@@ -188,6 +190,9 @@ const node_prototype = {
 					return true;
 				}
 			}
+
+			// All further ancestors are the wrong side of a pawn move or capture?
+
 			if (ancestor.board.halfmove < 2) {
 				return false;
 			}