Work on Eightpieces draft. Fix Grand deterministic initial position

[vchess.git] / client / src / base_rules.js

diff --git a/client/src/base_rules.js b/client/src/base_rules.js
index f0fe9e6..1c5eabc 100644 (file)
--- a/client/src/base_rules.js
+++ b/client/src/base_rules.js
@@ -428,6 +428,7 @@ export const ChessRules = class ChessRules {
     this.INIT_COL_ROOK = { w: [-1, -1], b: [-1, -1] };
     this.kingPos = { w: [-1, -1], b: [-1, -1] }; //squares of white and black king
     const fenRows = V.ParseFen(fen).position.split("/");
+    const startRow = { 'w': V.size.x - 1, 'b': 0 };
     for (let i = 0; i < fenRows.length; i++) {
       let k = 0; //column index on board
       for (let j = 0; j < fenRows[i].length; j++) {
@@ -441,12 +442,16 @@ export const ChessRules = class ChessRules {
             this.INIT_COL_KING["w"] = k;
             break;
           case "r":
-            if (this.INIT_COL_ROOK["b"][0] < 0) this.INIT_COL_ROOK["b"][0] = k;
-            else this.INIT_COL_ROOK["b"][1] = k;
+            if (i == startRow['b']) {
+              if (this.INIT_COL_ROOK["b"][0] < 0) this.INIT_COL_ROOK["b"][0] = k;
+              else this.INIT_COL_ROOK["b"][1] = k;
+            }
             break;
           case "R":
-            if (this.INIT_COL_ROOK["w"][0] < 0) this.INIT_COL_ROOK["w"][0] = k;
-            else this.INIT_COL_ROOK["w"][1] = k;
+            if (i == startRow['w']) {
+              if (this.INIT_COL_ROOK["w"][0] < 0) this.INIT_COL_ROOK["w"][0] = k;
+              else this.INIT_COL_ROOK["w"][1] = k;
+            }
             break;
           default: {
             const num = parseInt(fenRows[i].charAt(j));
@@ -1128,16 +1133,18 @@ export const ChessRules = class ChessRules {
   getComputerMove() {
     const maxeval = V.INFINITY;
     const color = this.turn;
-    // Some variants may show a bigger moves list to the human (Switching),
-    // thus the argument "computer" below (which is generally ignored)
     let moves1 = this.getAllValidMoves();
 
     if (moves1.length == 0)
       // TODO: this situation should not happen
       return null;
 
-    // Rank moves using a min-max at depth 2
+    // Rank moves using a min-max at depth 2 (if search_depth >= 2!)
     for (let i = 0; i < moves1.length; i++) {
+      if (V.SEARCH_DEPTH == 1) {
+        moves1[i].eval = this.evalPosition();
+        continue;
+      }
       // Initial self evaluation is very low: "I'm checkmated"
       moves1[i].eval = (color == "w" ? -1 : 1) * maxeval;
       this.play(moves1[i]);
@@ -1185,19 +1192,9 @@ export const ChessRules = class ChessRules {
     });
 //    console.log(moves1.map(m => { return [this.getNotation(m), m.eval]; }));
 
-    let candidates = [0]; //indices of candidates moves
-    for (let j = 1; j < moves1.length && moves1[j].eval == moves1[0].eval; j++)
-      candidates.push(j);
-    let currentBest = moves1[candidates[randInt(candidates.length)]];
-
     // Skip depth 3+ if we found a checkmate (or if we are checkmated in 1...)
     if (V.SEARCH_DEPTH >= 3 && Math.abs(moves1[0].eval) < V.THRESHOLD_MATE) {
-      // From here, depth >= 3: may take a while, so we control time
-      const timeStart = Date.now();
       for (let i = 0; i < moves1.length; i++) {
-        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 =
@@ -1208,10 +1205,9 @@ export const ChessRules = class ChessRules {
       moves1.sort((a, b) => {
         return (color == "w" ? 1 : -1) * (b.eval - a.eval);
       });
-    } else return currentBest;
-//    console.log(moves1.map(m => { return [this.getNotation(m), m.eval]; }));
+    }
 
-    candidates = [0];
+    let candidates = [0];
     for (let j = 1; j < moves1.length && moves1[j].eval == moves1[0].eval; j++)
       candidates.push(j);
     return moves1[candidates[randInt(candidates.length)]];