From: Benjamin Auder <benjamin.auder@somewhere>
Date: Sun, 10 Jan 2021 20:47:54 +0000 (+0100)
Subject: Fix Pacosako attacks detection
X-Git-Url: https://git.auder.net/?p=vchess.git;a=commitdiff_plain;h=f719757530f757dc20ef895b6b96ab2ec520b0ea

Fix Pacosako attacks detection
---

diff --git a/client/src/variants/Pacosako.js b/client/src/variants/Pacosako.js
index b67d429b..b4ed6d5d 100644
--- a/client/src/variants/Pacosako.js
+++ b/client/src/variants/Pacosako.js
@@ -600,10 +600,23 @@ export class PacosakoRules extends ChessRules {
     // "positions" = array of FENs to detect infinite loops. Example:
     // r1q1k2r/p1Pb1ppp/5n2/1f1p4/AV5P/P1eDP3/3B1PP1/R3K1NR,
     // Bxd2 Bxc3 Bxb4 Bxc3 Bxb4 etc.
-    const newPos = { fen: super.getBaseFen(), piece: released };
-    if (positions.some(p => p.piece == newPos.piece && p.fen == newPos.fen))
+    const newPos = {
+      fen: super.getBaseFen(),
+      piece: released,
+      from: fromSquare
+    };
+    if (
+      positions.some(p => {
+        return (
+          p.piece == newPos.piece &&
+          p.fen == newPos.fen &&
+          p.from == newPos.from
+        );
+      })
+    ) {
       // Start of an infinite loop: exit
       return false;
+    }
     positions.push(newPos);
     const rank = (color == 'w' ? 0 : 7);
     const moves = this.getPotentialMovesFrom(fromSquare);