Rules & objective
Select a peg, jump over one adjacent peg into the empty hole immediately beyond, and remove the jumped peg. English and French boards allow only horizontal and vertical jumps; the triangle allows its three lattice axes.
Classic triangle: 14 pegs in 15 holes, with apex a1 empty. Finish with the sole peg at a1.
Generated challenges have three difficulties and accept a sole peg in any hole. New and Restart restore the same fixed classic start. In challenges, New changes the puzzle and Restart keeps it. Hint highlights one verified jump toward the target without playing it. Away from the known solution, search is bounded; no result does not prove impossibility. Each jump counts separately, including consecutive jumps by the same peg.
Controls
Click or tap a peg, then a legal empty destination hole to jump. Select a peg and a legal empty landing along a triangular lattice axis, then confirm.
Worked example
The triangular board permits jumps along its three lattice axes, always over one peg. Its classic start targets the final peg at apex a1.