How to play
Scrin is complete once every cell, edge, region, and fixed clue satisfies the numbered rectangles diagonal network completion test. The terminal check examines every relevant pile, cell, edge, room, and clue before awarding the result.
- Scrin starts with its fixed information already marked and its editable spaces left for the player. Shade clue-sized rectangles that never share an edge, and make their corner-to-corner contacts form one unbranched diagonal cycle. Restart reconstructs the same opening from the stored game ID, rules version, and seed.
- A move in Scrin is accepted only while it preserves every already-visible requirement. Shade clue-sized rectangles that never share an edge, and make their corner-to-corner contacts form one unbranched diagonal cycle. Failed validation leaves the move count, history, and board exactly as they were.
- Scrin is complete once every cell, edge, region, and fixed clue satisfies the numbered rectangles diagonal network completion test. The terminal check examines every relevant pile, cell, edge, room, and clue before awarding the result.