Porte Curio is a curious game for curious cats; players see one side of their pieces and only get to see the other side following capture.
Setup: Players place their ten pieces on the two closest rows of the 5x5 board such that the largest number on each piece faces towards them. Each player then shuffles the opponent's pieces.
Play: Players take turns moving one of their pieces in a straight unimpeded line, orthogonally or diagonally, a distance not exceeding the piece's visible number. The piece may land on an enemy piece of less or equal visible value to capture it by replacement, following which the capturing pieces is turned around.
Goal: A player wins by capturing all of the opponent's royal pieces, which are those pieces containing the highest number 4.
Curio can be played on Richard Rognlie's Play By Mail server - rules here: http://www.gamerz.net/pbmserv/curio.html