How to play
Complete Border Block when every editable decision satisfies the number gathering border path constraints together. The runtime checks the entire position rather than a visual approximation or an unsupported solvability claim.
- Border Block reconstructs its published opening from the route ID, rules version and local seed. Fixed clues, hidden cards and editable decisions remain separate, and restart reproduces the same position without a network request.
- The bounded checker rejects a finished grid unless draw a nonbranching border path so equal clues gather in blocks and different clues stay apart. Invalid, stale, non-finite and post-terminal actions leave the state and undo history unchanged.
- Complete Border Block when every editable decision satisfies the number gathering border path constraints together. The runtime checks the entire position rather than a visual approximation or an unsupported solvability claim.
Strategy tips
- Start Border Block with the most constrained exposed obligation, then preserve a second legal route before committing the first. Draw a nonbranching border path so equal clues gather in blocks and different clues stay apart.
- Do not treat a locally tidy move as proof of progress in Border Block; it can consume the only route that still satisfies the full boundary rule.
- Near the end of Border Block, count every unresolved destination or constraint before committing a narrow move. Use undo to compare legal branches, then recheck that every editable decision satisfies the number gathering border path constraints together.