### Cross the Streams (Pentomino) by Grant Fikes

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or solve online (using our beta test of Penpa-Edit tools)

Theme: Logical

Author/Opus: This is the 117th puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard Cross the Streams rules. Also, the solution has 55 shaded cells which must be divisible into the 11 given pentominoes (rotations and reflections allowed) without overlapping.

Answer String: Enter the length in cells of each of the black segments from left to right for the marked rows and from top to bottom for the marked columns in the two grids, going in order from A to B to C to D and separating each entry with a comma.

Time Standards (highlight to view): Grandmaster = 3:15, Master = 6:00, Expert = 12:00.

Solution: PDF; a solution video is available here.

Note: Follow this link for variations of Cross the Streams and this link for other classic Cross the Streams. If you are new to this puzzle type, here are our easiest Cross the Streams to get started on. Follow this link for other puzzles involving Pentominoes.

• John B says:

Keep trying to make that connection through the obggbz evtug pbeare and you’ll come to a conclusion eventually.

• Jack Bross says:

The logic towards the end got pretty interesting. I always like puzzles where it feels like you’re running out of useful information only halfway through, until you grok the logic.

• Francis says:

I thought the second column might be a better choice for entry string A since lbh pbhyq qvntbanyyl sybc gur J cragbzvab sbe n arne-pbeerpg fbyhgvba gung yrnirf gur guveq pbyhzaf ragel fgevat hapunatrq.

• Andrew Brecher says:

Which, in fact, is exactly what I did. Oops.

• Aaron Chan says:

The ending to this puzzle is very interesting.

• skynet says:

16:00.Nice puzzle

• chaotic_iak says:

08:39. Impressive ending there.