Grey Matters

9×9

It's all in your head, literally.

A crossword centered on cognition and problem-solving. This brain teaser features clever wordplay and clues about the process of thinking itself.

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Select a cell to see clues

Select a cell to see clues

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Across

3A
A seemingly bottomless problem
6A
Tough to crack, like a case or a nut
7A
Render a picture, say
10A
Spine of a mountain
11A
State of being poised for the challenge
14A
Made a miscalculation
15A
An indecisive person's go-to
16A
Strategist's outline
17A
Consider the pros and cons

Down

1D
Pythagoras had a famous one
2D
Of first importance, as a concern
4D
Where grey matter matters most
5D
What arias and anthems are
7D
A lion's share of satisfaction?
8D
In a perfect world...
9D
Phase for a hypothesis
12D
Clear the board
13D
Work the bugs out of

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