Easy bridge
100 stones.
Cross the river one stone at a time.Solve each puzzle with no wrong number and you move to the next stone.One wrong number and the stone crumbles: you start again from the first stone of that bridge.No hints, no auto-finish.A bridge never closes, so you can keep trying.Each bridge shows who got furthest and when.
Medium bridge
100 stones.
Hard bridge
100 stones.
Expert bridge
100 stones.
Master bridge
100 stones.
Surprise bridge
100 stones.