3D Chess · 8×8×8

A cube of eight boards. The opponent learns from everybody who plays it.

Board setup

Machine plays

Difficulty

Sound

Nothing played yet.

The board is a cube, eight squares in every direction. Drag to turn it, pinch to come closer.
Tap one of your pieces: every square it may reach turns into a green ghost. Tap one to move there, or tap the piece again to put it down.
A rook runs along the six axes. A bishop takes the twelve diagonals that lie in a face. A queen has all twenty-six directions, and a king the same, one step. A knight leaps twenty-four ways.
A pawn advances by rank or by level — a step toward the far side, or a climb of one board — and it takes one file to either side of wherever it could have moved.
It promotes only on reaching the far rank and the far level, where you choose what it becomes.
The amber squares mark where the last move came from and went to.

A puzzle inside a four-dimensional solid. Send every line out of it before the moves run out — a thousand levels of it.

Finished games are sent to Fractalon, without anything identifying you, so the opponent learns from everybody who plays.