Can you force the draw??

There is a definite  rule to remember in this position ... but as White, can you see what you need to do to draw??

Show Solution

Solution: 1. Bxg4 forces a draw ...! The point to remember is that 1. Black does not have a light squared Bishop and 2. They only have a rook's pawn ... ! so the White King remains on h1 blocking the pawn's path ...