More on the rule history and this puzzle. https://en.wikipedia.org/wiki/Promotio...

		sgustard on Sept 18, 2015 \| parent \| context \| favorite \| on: The Hardest chess problem in the world? More on the rule history and this puzzle. https://en.wikipedia.org/wiki/Promotion_%28chess%29#1862_Bri... "The broad language of Law XIII also appears to allow promotion to any piece of either color. This led to the whimsical endgame study diagrammed at right. White is to play and checkmate in one move."