diff --git a/src/components/ChessboardRepaintPuzzle.tsx b/src/components/ChessboardRepaintPuzzle.tsx
index e1b1b99..58b589c 100644
--- a/src/components/ChessboardRepaintPuzzle.tsx
+++ b/src/components/ChessboardRepaintPuzzle.tsx
@@ -221,7 +221,6 @@ const ChessboardRepaintPuzzle: React.FC<ChessboardRepaintPuzzleProps> = ({ showS
           transition-all duration-200 hover:scale-105
           ${isBlack ? 'bg-gray-800' : 'bg-gray-100'}
           ${isAffected ? 'border-2 border-red-500' : ''}
-          ${isBottomRight ? 'bg-yellow-50' : ''}
         `}
         title={isBottomRight ? `Hover for 3s to switch mode (current: ${bottomRightMode})` : undefined}
       />
@@ -320,10 +319,7 @@ const ChessboardRepaintPuzzle: React.FC<ChessboardRepaintPuzzleProps> = ({ showS
                 <div className="w-5 h-5 border-2 border-red-500"></div>
                 <span>Hover to preview affected squares</span>
               </div>
-              <div className="flex items-center gap-2">
-                <div className="w-5 h-5 bg-yellow-50 border border-gray-300"></div>
-                <span>Bottom-right corner (switchable mode)</span>
-              </div>
+
             </div>
           </div>
         </CardContent>
@@ -355,7 +351,7 @@ const ChessboardRepaintPuzzle: React.FC<ChessboardRepaintPuzzleProps> = ({ showS
                 <li><strong>Repaint a 2×2 square:</strong> Click any square to flip all four squares in the 2×2 region with that square as the top-left corner.</li>
                 <li><strong>Repaint a row:</strong> Click any square in the rightmost column to flip all squares in that entire row.</li>
                 <li><strong>Repaint a column:</strong> Click any square in the bottom row to flip all squares in that entire column.</li>
-                <li><strong>Bottom-right corner:</strong> Hover for 3 seconds to switch between row and column mode. The corner square is highlighted in light yellow.</li>
+                <li><strong>Bottom-right corner:</strong> Hover for 3 seconds to switch between row and column mode.</li>
                 <li><strong>Preview:</strong> Hover over any square to see which squares will be affected (highlighted with red border).</li>
                 <li><strong>Goal:</strong> Achieve exactly one black square on the entire board.</li>
               </ol>