Pentominonogram by Elyot Grant
or solve online (using our beta test of Penpa-Edit tools).
Author/Opus: This is the 5th puzzle from guest contributor Elyot Grant.
Rules: Shade some cells so that the numbers outside the grid indicate the groups of consecutive black cells which are in that row/column in order, either from left to right or from top to bottom. There must be at least one white cell between any consecutive shaded groups. Rows and columns without outside clues can have any pattern of shaded and unshaded cells. Also, all the shaded cells must be able to be split into the eleven given pentomino shapes. Pentominoes may be flipped and/or rotated.
Difficulty: 3 stars
Time Standards (highlight to view): Grandmaster = 2:15, Master = 4:15, Expert = 8:30
Solution: PDF and solving video.
Note: Follow this link for other less common Shading puzzles.
6:15, felt more like 2 stars to me
nkm: I agree. I got under GM time (and I rarely if ever get that) and that includes rereading the instructions on one minor point during the solve. Also: typo in rules? “seven” should be “11” I think.
Never seen this genre before, but I enjoyed it! 11:41
it took me a while to understand but ı solved and good puzzle
Clarifying LorenR’s note: the rules on the website here correctly show “eleven”, but the rules in the penpa-edit version show “seven”.
There are so many places this text can propagate, so Loren’s message was correct when posted and then I fixed the web and missed the Penpa.
I’ll advise the team to generalize these instructions because we can just say “the given shape set” and don’t have to use seven (like the last pentominonogram) or eleven (like this one) where we’ll run into errors in not looking at the content very closely so the intention is the shape inventory.