You complete Midpoint Loop when one non-branching loop crosses every mark and the straight run on each side of a marked midpoint has equal length. The engine evaluates the full position rather than relying on a visual shortcut or an unsupported solvability claim.
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You complete Midpoint Loop when one non-branching loop crosses every mark and the straight run on each side of a marked midpoint has equal length. The engine evaluates the full position rather than relying on a visual shortcut or an unsupported solvability claim.
Complete guide
Midpoint Loop uses the independently implemented Nikoli Mid-loop rules v1 profile (R451). Midpoint Loop is a complete deterministic browser game whose distinct rules centre on a single loop whose marked points must lie exactly halfway along straight loop segments rather than merely somewhere on them.
Midpoint Loop opens from a versioned seeded position built for a single loop whose marked points must lie exactly halfway along straight loop segments rather than merely somewhere on them. Its game ID, rules profile, and deal identity are stored together so restart recreates the same opening without a server request.
Every Midpoint Loop action is checked against the current board, available material, and this defining restriction: the loop cannot turn at a marked point, and equal-distance counting stops at the first turn in each direction. Invalid, stale, or post-terminal actions leave the position unchanged.
You complete Midpoint Loop when one non-branching loop crosses every mark and the straight run on each side of a marked midpoint has equal length. The engine evaluates the full position rather than relying on a visual shortcut or an unsupported solvability claim. Near the end of Midpoint Loop, recount the remaining obligations needed until one non-branching loop crosses every mark and the straight run on each side of a marked midpoint has equal length. Check the boundary rule after every final placement or transfer because terminal status is enforced immediately.
A practical Midpoint Loop plan is to preserve several legal continuations around a single loop whose marked points must lie exactly halfway along straight loop segments rather than merely somewhere on them. Use the deterministic hint to inspect one legal action, then compare how it affects the documented objective before committing. A common Midpoint Loop error is to ignore the boundary rule that the loop cannot turn at a marked point, and equal-distance counting stops at the first turn in each direction. Undo is useful for studying that decision, while restart deliberately preserves the original seeded position.
Midpoint Loop has its own runtime and save identity because its rules require a single loop whose marked points must lie exactly halfway along straight loop segments rather than merely somewhere on them.
the loop cannot turn at a marked point, and equal-distance counting stops at the first turn in each direction.
Midpoint Loop stores its game ID, rules version, and seeded deal identity. Those values recreate the same opening locally without promising that the position is forced or winnable.