Quantum Chess
Probabilistic chess where pieces exist in superposition and collapse on interaction.
How to Play
- Standard chess rules apply, but pieces can move probabilistically.
- Click a piece to select it, then click a destination square to move. Or drag directly. If multiple pieces share a square, a picker appears to choose which one.
- Hold a piece 1s to arm a 50% quantum move — it glows purple. Quick-click keeps it 100%.
- A piece may pass through uncertain blockers; on success or failure, branch histories collapse.
- Castling requires 100% certainty for both the king and rook.
- Ring fill shows piece probability. Click a piece to view its branch history tree.
- ← → arrow keys rewind and replay the game. Only the latest position is playable.