# HG changeset patch
# User Oleksandr Gavenko <gavenkoa@gmail.com>
# Date 1411682220 -10800
# Node ID bf3d47ecd0ddf3ca5fe7a49a33ce9602b1a75e89
# Parent  4734390c343b995cdb940fa17e155c79f6a2bf23
BoardArr.prototype.compress

diff -r 4734390c343b -r bf3d47ecd0dd board.js
--- a/board.js	Thu Sep 25 02:20:48 2014 +0300
+++ b/board.js	Fri Sep 26 00:57:00 2014 +0300
@@ -34,6 +34,20 @@
         && from[8] === to[8] && from[9] === to[9] && from[10] === to[10] && from[11] === to[11]
         && from[13] === to[13] && from[14] === to[14];
 }
+BoardArr.prototype.compress = function() {
+    var brd = this.brd;
+    var h1 = 0;
+    for (var j = 0; j < 4; j++)
+        h1 = (h1 << 4) | brd[0][j];
+    for (var j = 0; j < 4; j++)
+        h1 = (h1 << 4) | brd[1][j];
+    var h2 = 0;
+    for (var j = 0; j < 4; j++)
+        h2 = (h2 << 4) | brd[2][j];
+    for (var j = 0; j < 4; j++)
+        h2 = (h2 << 4) | brd[3][j];
+    return [h1, h2];
+}
 /* Return and optionally fill 2d board.
  * Doesn't designed to be efficient. */
 BoardArr.prototype.exportTo = function(brd) {