Flip knights for variants with knightriders (waiting for a better image)

[vchess.git] / client / src / variants / Monochrome.js

diff --git a/client/src/variants/Monochrome.js b/client/src/variants/Monochrome.js
index 8c74961..2d5a912 100644 (file)
--- a/client/src/variants/Monochrome.js
+++ b/client/src/variants/Monochrome.js
@@ -37,6 +37,10 @@ export class MonochromeRules extends ChessRules {
     return true;
   }
 
+  getPpath(b) {
+    return (b[1] == V.KNIGHT ? "Enpassant/" : "") + b;
+  }
+
   canIplay(side, [x, y]) {
     const xBounds = side == 'w' ? [4,7] : [0,3];
     return this.turn == side && x >= xBounds[0] && x <= xBounds[1];
@@ -60,8 +64,8 @@ export class MonochromeRules extends ChessRules {
   getPotentialKingMoves(sq) {
     // King become queen:
     return (
-      this.getSlideNJumpMoves(sq, V.steps[V.ROOK].concat(V.steps[V.BISHOP]));
-    )
+      this.getSlideNJumpMoves(sq, V.steps[V.ROOK].concat(V.steps[V.BISHOP]))
+    );
   }
 
   getAllPotentialMoves() {
@@ -153,12 +157,18 @@ export class MonochromeRules extends ChessRules {
 
   static GenRandInitFen(randomness) {
     // Remove the en-passant + castle part of the FEN
-    const fen = ChessRules.GenRandInitFen(randomness).slice(0, -6);
+    let fen = ChessRules.GenRandInitFen(randomness).slice(0, -6);
+    // Replace kings with queens
+    fen = fen.replace("k", "q").replace("K", "Q");
+    // Move pawns up:
+    fen = fen.replace("pppppppp/8","8/pppppppp")
+             .replace("8/PPPPPPPP","PPPPPPPP/8");
     const firstSpace = fen.indexOf(' ');
-    return (
+    // Paint it black:
+    fen =
       fen.substr(0, firstSpace).replace(/[A-Z]/g, (c) => c.toLowerCase()) +
-      fen.substr(firstSpace)
-    );
+      fen.substr(firstSpace);
+    return fen;
   }
 
   static get SEARCH_DEPTH() {