count each player's moves separately, not as pairs

js/chess.js

@@ -82,7 +82,7 @@ function boardPut(board, where, side, piece){
 function countMoves(board) {
    var n = 0;
    while (board && board['prior']) {
-      if (board['player'] === 'light' && board['prior']['player'] !== 'light') {
+      if (board['prior']['player'] !== board['player']) {
          ++n;
       }
       board = board['prior'];