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Published at 623 × 623 in How to write a crossnumber

The grid for crossnumber #17 was not symmetric, and instead included all 18 pentominoes in black.

Matthew is a research software engineer (RSE) in the Advanced Research Computing Centre (ARC) at University College London (UCL). His hobbies include pretending to be called Humbug (H).
mscroggs.co.uk    All articles by Matthew

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