How to play
You complete Castle Wall when one closed wall separates all black and white clues correctly and every arrow sees its stated number of selected segments. The engine evaluates the full position rather than relying on a visual shortcut or an unsupported solvability claim.
- Castle Wall opens from a versioned seeded position built for a wall loop that keeps black clues inside and white clues outside while matching directional counts of wall segments. Its game ID, rules profile, and deal identity are stored together so restart recreates the same opening without a server request.
- Every Castle Wall action is checked against the current board, available material, and this defining restriction: the loop cannot pass through a clue, and an arrow count includes only wall segments lying along its indicated ray. Invalid, stale, or post-terminal actions leave the position unchanged.
- You complete Castle Wall when one closed wall separates all black and white clues correctly and every arrow sees its stated number of selected segments. The engine evaluates the full position rather than relying on a visual shortcut or an unsupported solvability claim.
Strategy tips
- A practical Castle Wall plan is to preserve several legal continuations around a wall loop that keeps black clues inside and white clues outside while matching directional counts of wall segments. Use the deterministic hint to inspect one legal action, then compare how it affects the documented objective before committing.
- A common Castle Wall error is to ignore the boundary rule that the loop cannot pass through a clue, and an arrow count includes only wall segments lying along its indicated ray. Undo is useful for studying that decision, while restart deliberately preserves the original seeded position.
- Near the end of Castle Wall, recount the remaining obligations needed until one closed wall separates all black and white clues correctly and every arrow sees its stated number of selected segments. Check the boundary rule after every final placement or transfer because terminal status is enforced immediately.