3D Tic Tac Toe — Three Layers vs Computer

Click to place X on any of three stacked 3×3 layers. The computer plays O and checks every 3D line. Private by design—everything runs in your browser.

Board (three layers)

Top Layer

Middle Layer

Bottom Layer

Ready. Click any empty square to start as X.

Options & Score

Tip: Lines can form across layers—look for straight lines through the stack and 3D diagonals.

X (You)

0

Draws

0

O (Computer)

0

How 3D Tic Tac Toe Works

  • Three 3×3 layers (top, middle, bottom) form a 3×3×3 cube.
  • You are X. The computer is O. Turns alternate.
  • Wins can be horizontal, vertical, or diagonal within a layer, straight pillars through layers, layer-crossing diagonals, and the 4 space diagonals corner-to-corner.
  • Click any empty square. The computer replies automatically.

The AI checks all 3D lines every move, tries to win, blocks your immediate wins, then favours the centre and high-potential spots.

5 Fun Facts about 3D Tic Tac Toe

49 hidden win lines

A 3×3×3 cube hides 49 winning lines—far more than the 8 in classic Tic Tac Toe.

So many paths

The super-square

The centre cube belongs to 13 lines, making it the single most powerful spot on the board.

Power position

Diagonal pillars

You can win by zig-zagging upward: start in a bottom corner, step inward each layer, and exit the opposite top corner.

Twist wins

Drawn to perfection

With flawless play, 3×3×3 is a forced draw—but one missed pillar and the whole stack falls.

Solved outcome

Retro alias: Qubic

The game also goes by Qubic and showed up in puzzle magazines back in the 1960s—long before computers solved it.

Vintage roots

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