tōdai
Tōdai: a route the lighthouses count
Tōdai is Japanese for lighthouse, and one of the three logic puzzles at Tabi Puzzles. Every one is made by hand and checked by a solver to have exactly one solution, found by reasoning alone.
Like Light Up (Akari) or Slitherlink: one route through the grid, and lighthouses whose numbers count how much of it their light falls on.
The newest Tōdai ↓Play today’s puzzle
The rules
- Find the one route from the entrance to the harbour 港. It steps up, down, left and right, never crosses a wall, never enters a void, a mirror or a lighthouse, and never visits a square twice.entrancewallvoida line
- A lighthouse shines four beams, up, down, left and right. A beam turns a corner at a mirror — both faces reflect — and stops at a wall, a void, the edge of the board or another lighthouse. A mirror can turn more than one beam, also a beam that another mirror has already turned.lighthousemirror
- Its number is how many route squares its light falls on. The entrance and the 港 count, and a square lit twice counts once. Tap a lighthouse to see its light.lit: 3
The newest Tōdai
Harbour on the IslandPlay it →
Earlier Tōdai puzzles
- Up Both Sides of the Diamond9×9 · ★★★★☆Pro
2026-10-17 - The Battlements5×7 · ★★☆☆☆
2026-10-15 - Twin Ends7×9 · ★★★★★Pro
2026-10-14 - The Narrow Middle7×8 · ★★★☆☆
2026-10-12 - Below the Battlements9×11 · ★★★★☆Pro
2026-10-11 - Two 9s7×7 · ★★★★☆
2026-10-09 - Out of the Long Corridor9×7 · ★★★☆☆Pro
2026-10-08 - Two Lighthouse Sets6×6 · ★★☆☆☆
2026-10-06 - Mirror Diagonal7×7 · ★★★★☆Pro
2026-10-05 - Two Center Voids7×7 · ★★★☆☆
2026-10-03 - Four Rooms11×11 · ★★★★☆Pro
2026-10-02 - First Light6×6 · ★★☆☆☆
2026-09-30