What replaces Sieve

Two directions, each one you reason through rather than tap at. Every board shown is real: a solver checked the path puzzle has exactly one answer, and the engine checked the problem has one winning first move.

Your call: Walk, Problems, or both? I recommend Walk for the Puzzles shelf. It needs one rule, anyone can start it, and nobody else has it. Problems could come later inside Ground and Colony, as their puzzles.

Walk

Visit every square once, in one unbroken walk. Ground's idea, as a puzzle: the square you're on decides which way you can step.

  1. Start on 1. Step one square at a time and visit every square exactly once.
  2. From a + square you step up, down, left or right. From a × square you step diagonally.
  3. Numbered squares must be visited at that number.

Problems

A position from Ground (or Colony) with one winning line, like a chess puzzle. Three tries. It also teaches our strategy games.

Staging