X-Git-Url: https://git.auder.net/images/pieces/%22%20%20V.getPpath%28board%5Bi%5D%5Bj%5D%29%20%20%20%22.svg?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FKnightrelay1.js;h=aba952905069a08367310accc078c9a4da5139f9;hb=7e107b8f9dc9a4e7d9676fd2c48ba19f6cfc1661;hp=1e7bfabb8fd0d09d77eb05c388835a8f6c1726ca;hpb=7e8a7ea1cb66adb4a987badfb0a3c2f99a21bd0a;p=vchess.git

diff --git a/client/src/variants/Knightrelay1.js b/client/src/variants/Knightrelay1.js
index 1e7bfabb..aba95290 100644
--- a/client/src/variants/Knightrelay1.js
+++ b/client/src/variants/Knightrelay1.js
@@ -6,7 +6,19 @@ export class Knightrelay1Rules extends ChessRules {
     return false;
   }
 
-  // TODO: IsGoodPosition to check that 2 knights are on the board...
+  static IsGoodPosition(position) {
+    if (!ChessRules.IsGoodPosition(position)) return false;
+    // Check that (at least) 2 knights per side are on the board
+    const rows = position.split("/");
+    let knights = { 'N': 0, 'n': 0 };
+    for (let row of rows) {
+      for (let i = 0; i < row.length; i++) {
+        if (['N','n'].includes(row[i])) knights[row[i]]++;
+      }
+    }
+    if (Object.values(knights).some(v => v < 2)) return false;
+    return true;
+  }
 
   getPotentialMovesFrom([x, y]) {
     let moves = super.getPotentialMovesFrom([x, y]);