How to play
You complete Toichika when the completed grid satisfies the nonneighboring arrow pairs constraint set, every fixed clue, and the profile's whole-board completion test. The engine evaluates the full position rather than relying on a visual shortcut or an unsupported solvability claim.
- Toichika opens from a versioned seeded position built for Each region places one arrow and every arrow forms a clear facing pair with an arrow in a nonadjacent region. The independent runtime records this exact nonneighboring arrow pairs rules identity. Its game ID, rules profile, and deal identity are stored together so restart recreates the same opening without a server request.
- Every Toichika action is checked against the current board, available material, and this defining restriction: Each region places one arrow and every arrow forms a clear facing pair with an arrow in a nonadjacent region. Partial assignments remain legal only while at least one completion still satisfies those constraints. Invalid, stale, or post-terminal actions leave the position unchanged.
- You complete Toichika when the completed grid satisfies the nonneighboring arrow pairs constraint set, every fixed clue, and the profile's whole-board completion test. The engine evaluates the full position rather than relying on a visual shortcut or an unsupported solvability claim.
Strategy tips
- A practical Toichika plan is to preserve several legal continuations around Each region places one arrow and every arrow forms a clear facing pair with an arrow in a nonadjacent region. The independent runtime records this exact nonneighboring arrow pairs rules identity. Use the deterministic hint to inspect one legal action, then compare how it affects the documented objective before committing.
- A common Toichika error is to ignore the boundary rule that Each region places one arrow and every arrow forms a clear facing pair with an arrow in a nonadjacent region. Partial assignments remain legal only while at least one completion still satisfies those constraints. Undo is useful for studying that decision, while restart deliberately preserves the original seeded position.
- Near the end of Toichika, recount the remaining obligations needed until the completed grid satisfies the nonneighboring arrow pairs constraint set, every fixed clue, and the profile's whole-board completion test. Check the boundary rule after every final placement or transfer because terminal status is enforced immediately.