From Pavel Minar:
Stones is a simple logic game. Up to 4 players can play Stones, you can setup who will play (nobody, you, palm) for each player in New Game dialog. The basic rule is to capture as many fields as possible. You capture enemy stones by jumping to the field near by the field where enemy stone is. The move (jump) can be short (by 1 field) or long (by 2 fields - the original stone is removed). The game ends when there are no more free fields. The final score of the player is counted as number of fields captured multiplied by number of opponents.