Skipping Stones · Level 2 · Board 11
Two stones meet beneath the checkpoint
Collide the stones in the checkpoint column to create the missing crossing.

Is this your board?
A U-shaped bay with a checkpoint near its upper centre and a pink stone on each side of the water.
If your layout differs, compare the other boards before following this route.
A = the original sailor from Level 1. B = the companion introduced in Level 2. Left, right, up and down refer to the pictured board.
Choose how much help you want
Stop after any hint. The complete route and later-state picture remain hidden below.
Hint 1What to notice
A stone that stops in the middle can become useful. The other moving stone supplies the stop.
Hint 2What to set up
Line up both stones one row below the checkpoint before you start either throw.
Hint 3The decisive move
Send the right-hand stone left first. Launch the other right when the first is four squares to the right of the checkpoint’s column.
Open the full routeSolution spoilers and the target state
Prepare A’s side
A moves the right stone left, up, three right and four up. It should be one row below the checkpoint.
Prepare B’s side
B moves the left stone up three tiles and right into that same row. Keep both sailors in their throwing positions.
Time the collision
A pushes left across the water. When the moving stone is four squares right of the checkpoint column, B pushes right. The stones meet and create a submerged crossing beneath the checkpoint.
Take the crossing
Use that new stepping point to reach the checkpoint and proceed to the boat-return board.

Check your result
The new submerged point is in the checkpoint column, not merely somewhere between the islands.
If your attempt went wrong
Undo B’s launch if the collision lands in the wrong column. An earlier or later second throw changes where they meet; keep the row setup unchanged.
Watch the original move-by-move demonstration ↗
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Use directions relative to the board image. Where timing matters, use your game's current slow-time binding. Launch-layout route; the October 9 update changes some South-world checkpoints.
Further reading: Game Rant's Level 2 walkthrough. Hint wording and route explanations by Sinking Star Hub. See how to report a mismatch.