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12 votes
0 answers
455 views

Can you open the safe?

3 votes
0 answers
147 views

Beyond an imaginary line

7 votes
1 answer
161 views

Setter's lighter

2 votes
0 answers
46 views

Avoiding Dead Rubbers

3 votes
2 answers
401 views
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connections with numbers II

25 votes
1 answer
816 views

Quartum non datur

39 votes
6 answers
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too easy puzzle? Try it first!

5 votes
1 answer
570 views

What happens to her?

2 votes
0 answers
38 views

~A Hairy Riley~

19 votes
1 answer
5k views

What's the maximum number of pegs you can leave on a 15-hole triangular peg solitaire?

11 votes
3 answers
741 views

The Royal Relay on a Chessfield

7 votes
1 answer
215 views

Noble feathers?

5 votes
2 answers
2k views

You mean, I can't just put my space-filling curve anywhere I want??

8 votes
1 answer
340 views

Infinitesimal riddle

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