Toichika (้ ใ่ชใ, “distant promise”) is a Nikoli logic puzzle by Gesaku. The grid is divided into outlined regions.
- Draw exactly one arrow in each region — pointing up, down, left, or right.
- Every arrow must form a facing pair: it points directly at exactly one other arrow along the same row or column.
- Two paired regions may not share a border (touch orthogonally).
- No other arrow may lie on the line strictly between a facing pair.
Controls: Tap a cell to place / rotate an arrow (empty โ โ โ โ โ โ โ โ โ erase). Keys: H hint, R restart, Enter check, Esc menu.