4D Tic-Tac-Toe

Copyright (c) 1998 Sean Bridges

This game is played on an empty 3x3x3x3 cell board (or one 9x9 square board):

DROP - On each turn, each player drops a stone on an empty cell.
GOAL - When all cells are occupied, wins the player with more 3 in-a-rows.
N rows 4 dimensions...

The green dots show all the 3 in-a-rows that include the black stone.

A sample endgame 

This game was a victory for White, which won 73-42. 

There is a Java program to play 4D Tic-Tac-Toe.