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Theme: One-Way Arrows

Author/Opus: This is the 170th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Pentopia rules: Place some of the given pentominoes in the grid so that no pentominoes are in adjacent cells that share an edge or corner. Pentominoes cannot repeat in the grid; rotations and reflections of a pentomino are considered the same shape. The arrow clues indicate all the directions (up, down, left, and right) where the nearest pentominoes are located when looking from that square. (Arrow clues cannot contain pentomino shapes.) Also, see this example:

Answer String: Enter the length in cells of each of the shaded pentomino segments from top to bottom for the marked columns, starting at the left. Separate each column’s entry from the next with a comma.

Time Standards (highlight to view): Grandmaster = 6:00, Master = 10:45, Expert = 21:30

Solution: PDF; a solution video is also available here.

• marred says:

Nice one, but last three pentominoes was rather lucky guess for me, than logical analysis

• Dan says:

Jbj, terng chmmyr. V jnf irel hcfrg sbe n pbhcyr zvahgrf jura V ernyvmrq V unq abjurer gb chg gur K, naq gura V ernq V arrqrq gb cynpr whfg fbzr bs gur cragbzvabrf. Nyfb, va gur obggbz yrsg, V hfrq n cvrpr bs ybtvp gung V qba’g guvax V rire unq orsber, juvpu jnf gung gur bayl erznvavat cragbzvabrf jrag npebff 3 ebjf naq 3 pbyhzaf, fb gur bar erznvavat fdhner gung jbhyq unir nyybjrq gung unq gb or svyyrq. Ntnva, ernyyl terng chmmyr.

• William Hu says:

6:03,

Thought I broke it at around 4:00 mins because I couldn’t see anywhere to fit a particular pentomino. Re-read the rules and my worries were laid to rest – thankfully I hadn’t used any ‘this pentomino must appear somewhere’ deductions up to that point, otherwise I would’ve been in a bit of trouble!

Cool opening, and nice solve path all the way up to a cute ending.

• skynet says:

16:29.Hard and a very enjoyable solve.Perfect for a Saturday puzzle !

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