Fencer, it states in the rules that if the king is surrounded on 3 sides, and the thrown is on the fourth side, black wins.
But what if the king has an opening behind him, over the throne and to safety? Is that fair? Its still a legal move, and I think black should have to block that exit for the king too. Just a thought! I'm in a similar position now, and I may lose this game in these circumstances.