One game. Two worlds.
Classic chess… with a secret Underground!
TWO-LAYER CHESS • TUNNEL RULES
Think beyond the next move.
Think through the board.
Think you know chess? Discover a hidden world beneath the board. Tunnel, ambush, and turn a game around with one surprising move!
2 LAYERS
Now you see it… now you don’t!
Switch to the matching square on the other layer—even to capture!
The knight’s secret shortcut
Knights jump in an L across layers to empty squares for free.
Every tunnel counts
Pawn count sets normal tunnels. Freeze stops two consecutive normal tunnels.
A check from another world
Watch out for a check from the matching square on the other layer!
Where the kings meet
When escape chances run low, the layer where the kings meet becomes the final battleground — above or below.