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isaacg
  • Member for 9 years, 1 month
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33 votes

Knights, Knaves and Spies - Part 1

31 votes
Accepted

Creating the hardest 6x6 maze

24 votes
Accepted

Consecutive integers around a circle

19 votes

Open-ended challenge: Find the longest morsagram word pair

19 votes

2023 From Single Digits

15 votes
Accepted

Drowning Squirrel

14 votes
Accepted

Four ones and four zeros

14 votes
Accepted

Digit and (Digit) are different!

14 votes
Accepted

Blindfold Bingo

12 votes

A robot surviving on top of a 3x3 platform

12 votes
Accepted

Eight coins for the fair king

11 votes

Finding the larger number with a minimal number of questions

11 votes
Accepted

Covering an 8x8 grid with X pentominoes

11 votes

Blue eyes riddle: what information is gleaned after the first night?

11 votes

Can the cop catch the thief?

11 votes

Two Men - The Physicist and Plumber

8 votes
Accepted

Largest binary rectangle without any arithmetic progressions

8 votes

Impossible knot

7 votes

The dessert problem (blind ballot remaining blind if non-unanimous)

7 votes

Longest English homophone/heteronym chain

7 votes
Accepted

Treasure hunt 'round the world! (clue 4)

6 votes

The shorter the message, the larger the prize (version II)

6 votes

MIT Intro to Psychology, Raven's Progressive Matrices question

5 votes

Knight and knave impostors!

5 votes
Accepted

Find Those Chess Notations! #4

5 votes

Fair results with unfair die

5 votes
Accepted

Optimal present wrapping with a rectangle

5 votes
Accepted

The Survivors of Dictionaria

5 votes
Accepted

Checkmate with two knights, but with a twist

5 votes

Nice no-computers way to find limerick primes?