X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Fvariants%2FKnightrelay1.js;h=0afa9aa21793342f2d23aeb93cafa2e065471d99;hb=HEAD;hp=f032e21e82380ce4928e195545113dbb57ab7bc2;hpb=95a66034082b21e50eff842e26030ce2b6519685;p=vchess.git

diff --git a/client/src/variants/Knightrelay1.js b/client/src/variants/Knightrelay1.js
index f032e21e..0afa9aa2 100644
--- a/client/src/variants/Knightrelay1.js
+++ b/client/src/variants/Knightrelay1.js
@@ -1,10 +1,25 @@
 import { ChessRules } from "@/base_rules";
 
 export class Knightrelay1Rules extends ChessRules {
+
   static get HasEnpassant() {
     return false;
   }
 
+  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]);
 
@@ -58,7 +73,7 @@ export class Knightrelay1Rules extends ChessRules {
 
     // Check if a (non-knight) piece at knight distance
     // is guarded by a knight (and thus attacking)
-    // --> Except for pawns targetting last rank.
+    // --> Except for kings, and pawns targetting last rank.
     const x = sq[0],
           y = sq[1];
     // Last rank for me, that is to say oppCol of color:
@@ -69,7 +84,10 @@ export class Knightrelay1Rules extends ChessRules {
         this.getColor(x+step[0],y+step[1]) == color
       ) {
         const piece = this.getPiece(x+step[0],y+step[1]);
-        if (piece != V.KNIGHT && (piece != V.PAWN || x != lastRank)) {
+        if (
+          ![V.KNIGHT, V.KING].includes(piece) &&
+          (piece != V.PAWN || x != lastRank)
+        ) {
           for (const step2 of V.steps[V.KNIGHT]) {
             const xx = x+step[0]+step2[0],
                   yy = y+step[1]+step2[1];
@@ -118,7 +136,8 @@ export class Knightrelay1Rules extends ChessRules {
     const finalSquare = V.CoordsToSquare(move.end);
     const piece = this.getPiece(move.start.x, move.start.y);
 
-    // Since pieces and pawns could move like knight, indicate start and end squares
+    // Since pieces and pawns could move like knight,
+    // indicate start and end squares
     let notation =
       piece.toUpperCase() +
       initSquare +
@@ -136,4 +155,5 @@ export class Knightrelay1Rules extends ChessRules {
 
     return notation;
   }
+
 };