wow you need to learn perpetual check =). after Rxg3, you have forced mate, but if the rook was not on the 7th rank, you could have perpetual check =)
so... why does he need to learn it?
السلام عليكم ورحمة الله وبركاتهكيف العب في اللعبةعلمني بالتفصيلوشكرا