In a tic-tac-toe game, a winning line can go through each layer of the three boards (in addition to the standard winning lines in any 2D plane of a single board). Two players play on this 3-layer board with normal tic-tac-toe rules.
Is it possible to tie in this version of tic-tac-toe?
It is 's turn. can win by filling in the Top NW space. The winning line will go through Top NW, Middle Center, and Bottom SE.