X-Git-Url: https://git.auder.net/img/rock_paper_scissors_lizard_spock.gif?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FKnightrelay1.js;h=aba952905069a08367310accc078c9a4da5139f9;hb=9a1e3abe33fff07218b17c7c799eb622a730b7c7;hp=626519cd9a38784c0048c5ed9f95e70bf9428fe4;hpb=2c5d7b20742b802d9c47916915c1114bcfc9a9c3;p=vchess.git

diff --git a/client/src/variants/Knightrelay1.js b/client/src/variants/Knightrelay1.js
index 626519cd..aba95290 100644
--- a/client/src/variants/Knightrelay1.js
+++ b/client/src/variants/Knightrelay1.js
@@ -1,11 +1,24 @@
 import { ChessRules } from "@/base_rules";
 
 export class Knightrelay1Rules extends ChessRules {
+
   static get HasEnpassant() {
     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]);
@@ -139,4 +152,5 @@ export class Knightrelay1Rules extends ChessRules {
 
     return notation;
   }
+
 };