Fix thinking time cap for computer (5 seconds)

[vchess.git] / public / javascripts / base_rules.js

diff --git a/public/javascripts/base_rules.js b/public/javascripts/base_rules.js
index 5c1ef97..a8f2489 100644 (file)
--- a/public/javascripts/base_rules.js
+++ b/public/javascripts/base_rules.js
@@ -824,7 +824,6 @@ class ChessRules
        // NOTE: works also for extinction chess because depth is 3...
        getComputerMove()
        {
-               this.shouldReturn = false;
                const maxeval = VariantRules.INFINITY;
                const color = this.turn;
                // Some variants may show a bigger moves list to the human (Switching),
@@ -889,14 +888,17 @@ class ChessRules
                        candidates.push(j);
                let currentBest = moves1[_.sample(candidates, 1)];
 
+               // From here, depth >= 3: may take a while, so we control time
+               const timeStart = Date.now();
+
                // Skip depth 3+ if we found a checkmate (or if we are checkmated in 1...)
                if (VariantRules.SEARCH_DEPTH >= 3
                        && Math.abs(moves1[0].eval) < VariantRules.THRESHOLD_MATE)
                {
                        for (let i=0; i<moves1.length; i++)
                        {
-                               if (this.shouldReturn)
-                                       return currentBest; //depth-2, minimum
+                               if (Date.now()-timeStart >= 5000) //more than 5 seconds
+                                       return currentBest; //depth 2 at least
                                this.play(moves1[i]);
                                // 0.1 * oldEval : heuristic to avoid some bad moves (not all...)
                                moves1[i].eval = 0.1*moves1[i].eval +