Base variant
Main mutatorAfter every 7 moves, a warning marks a square. It erupts after 3 more moves, removes any piece there, and leaves lava that destroys pieces landing there later. The next warning waits until the current one erupts.
Detailed rule
After every 7 moves, a warning marks a square. It erupts after 3 more moves, removes any piece there, and leaves lava that destroys pieces landing there later. The next warning waits until the current one erupts.
