Conway Criterion (Touching Pentominoes)
(Published on 31. October 2026, 16:19 by sfushidahardy)
Conway Criterion
This puzzle was set for a weekly Scojo setting prompt. I hope you enjoy it!
Rules:
- Shade some cells in the grid so that groups of shaded cells form pentominoes. Distinct pentominoes may not share edges.
- Each pentomino shape (shown to the right of the grid) may be used at most once, where rotations and reflections are considered the same shape.
- Battenberg markings indicate that the surrounding 2x2 area forms a checkerboard pattern of shaded and unshaded cells. All battenberg markings are given.
A practice puzzle (with tetrominoes instead of pentominoes) to clarify the rules if needed.
Solution code: Row 6: the pentomino letter for shaded cells, and "E" for empty cells.
Last changed on on 31. October 2026, 17:06
Solved by puzzler05, h5663454, zzw, Mark Sweep, Calesch, KNT, Christounet, aqjhs, damo_89, ravenling, EvanB, Calump, MaizeGator, Lyouke, CHalb, Mr_tn, ildiko, shifman23, Agent, kangaroo, Kpn, misko, TheZwierz, Jesper, TVDK, Grothenlace
Comments
on 12. November 2026, 19:12 by TVDK
Impressive construction, very nice to solve.
on 2. November 2026, 02:33 by MaizeGator
Clue placements are *chefs kiss*
on 1. November 2026, 06:04 by EvanB
very good puzle reminds me of touching pentominoes
on 31. October 2026, 23:18 by damo_89
Very nice puzzle, impressive resolution
on 31. October 2026, 21:41 by aqjhs
had me at the title
on 31. October 2026, 19:37 by Christounet
Clever setup and fun puzzle! Thanks :)
