Guides & Articles
Rules, strategy, history and puzzles for three-dimensional tic-tac-toe.
A Short History of 3D Tic-Tac-Toe: From Qubic to the Browser
2026-10-04
How tic-tac-toe grew into a cube: Parker Brothers' Qubic, the 76 winning lines of the 4×4×4 board, and the computer proof that the first player always wins.
Win in Two: Three 3D Tic-Tac-Toe Puzzles
2026-10-04
Three computer-checked 4×4×4 puzzles with board diagrams: find the single move that creates two threats at once.
How Many Ways to Win? The Mathematics of 3D Tic-Tac-Toe Lines
2026-10-04
A formula for the number of winning lines on any cube, a table from 3×3×3 to 10×10×10, and which cells matter most.
7 Mistakes Every 3D Tic-Tac-Toe Beginner Makes
2026-10-04
Why new players lose in the cube — from forgetting space diagonals to blocking too late — and how to fix each habit.
3×3×3 or 10×10×10? How to Choose a Board Size
2026-10-04
What changes from the quick 3×3×3 cube to the 10×10×10 marathon: lines, key cells, game length and who each size suits.