3D Four in a Row Strategy: 5 Tips
Flat four-in-a-row is a solved parity game; the cube adds enough lines that threats come from all directions. Rules first? See how to play.
1. Count the lines
Each cell lies on four to seven winning lines. Cube corners and the eight cells at the very centre lie on seven. Play where your bead joins the most open lines.
2. Centre pegs first
The four middle pegs pass through the centre of the cube, where lines are densest. Occupying them early gives you threats in every layer.
3. Double threats
A single three can be blocked; two threes that need different cells cannot. Build beads that sit on two or more lines at once, so one move creates two threats.
4. Parity of pegs
Because beads stack, the cell above a threat is only available after someone fills the one below. Avoid filling a cell that hands your opponent the winning cell on top; sometimes a quiet move elsewhere forces them to do it.
5. The space diagonals
The four corner-to-corner diagonals are easy to miss on a flat display. Before every move, check both your opponent's and your own count on them.
The hard computer searches four plies with a line-count evaluation and always takes immediate wins and blocks; normal two; easy only wins and blocks.
Frequently asked questions
Which cells are strongest in 3D Four in a Row?
The eight cells at the centre of the cube (the inner 2×2 of layers 2 and 3) lie on seven lines each, the corners on seven too, while the cells in the middle of a face lie on only four. Take centre cells on the inner pegs early.
Last updated 2026-10-21