Godmund, the White King and Hrosmunda, his Queen, live in warmth and peace with their people in the garden. But one day a coldness arose between the King and the Queen, which allowed the enemy, the Red Horde, to invade the garden, led by a serpent with the head of a man. Then the chessboard at the centre of the garden becomes the battefield for the battle to end all battles.
Or so it says here.
... to do with chess Index