Sophia is played on a 4x4 square board. Each player has two sets of 7 pieces. Each set is a different shape. One side of every piece is one color, and the other side is a different color. (So that for instance one player has triangles with one side black and the other red, and the other player has squares, also with one side black and the other red). Each player controls a different shape, and each player aims to win by making a line of his or her particular colour. Drop Phase: On alternate turns, each player drops one their pieces (displaying whichever colour they choose uppermost) on an empty cell. When this phase ends, assuming neither player has achieved a win, there will be two empty cells left. Move Phase: Player move alternately, and must do one of the following actions: 1. Move a friendly piece. 2. Jump a friendly piece over any other adjacent piece, flipping the latter over to display the color on the other side. This is a "short jump" as in checkers/draughts, with no space between the initial positions of the moved piece and the flipped piece, nor between the flipped piece and the final position of the moved piece). 3. Takes no action player if he/she does not have any legal move available. Goal: Play ends when one player wins by making a 4 in-a-row of their chosen color. In the basic game, winning lines and jumps are permitted horizontally, vertically, and diagonally. For longer and "more stable" variants, outlaw diagonals from the win conditions, or from jumps, or from both.