Zerdly

Polyomino Territory

A territory game with eight shapes each. Grow out from your corner, touching your own pieces only corner-to-corner — and get in your opponent's way while you do.

Claim the board with your eight pieces — each must touch your own pieces only at the corners.

FreeOn this device

Tap a square once to aim, tap it again to place. The outlined preview is green when legal.

Your pieces (8 left)

Pass is only possible when you have no legal placement. The game ends when neither side can move; the most squares wins.

You to place (blue, from the top-left). Score 0–0. 19 legal placements.

Controls

  • Choose a piece from the list; Rotate (R) and Flip (F) change its orientation.
  • Move to a square (tap, or the arrow keys) — the outlined preview shows where the piece would go, green if legal. Tap again, press Enter or use Place here to place it.
  • Show a legal placement points one out; Pass is only allowed when you have none. Undo and New game are always available.

The rules

  • Each player has the same eight pieces: one each of the monomino, domino, two triominoes and four tetrominoes. Each is used once.
  • Your first piece must cover your starting corner. Every later piece must touch one of your own pieces at a corner and never along a side.
  • Pieces may touch your opponent's in any way but cannot overlap. When neither side can place, the side covering more squares wins; equal is a draw.

Scoring, saving and limits

Your score is the number of squares your pieces cover, shown throughout.

Your game is kept on this device only. Download a backup to move it.

Original shapes and artwork. The computer prefers large pieces and keeps its own corners open while closing yours; it does not search deeply.

Questions

Why can't I put two of my pieces side by side?
That is the core rule — your pieces may only meet at corners, which forces you to spread out diagonally.
Can I touch the other player's pieces?
Yes, in any way, as long as nothing overlaps. Blocking their open corners is a strong tactic.
When may I pass?
Only when no remaining piece fits anywhere legally. The game checks this, so a pass can never be used by mistake.