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Bubbler
  • Member for 3 years, 8 months
  • Last seen this week
  • UTC+9
7 votes
2 answers
435 views

Santoitchi: Crowded?

7 votes
2 answers
454 views

Pentomino tiling on wrap-around 5x5 grids

6 votes
2 answers
308 views

Pandigital fraction sum that evaluates to 1

6 votes
2 answers
201 views

River crossing cats and dogs

6 votes
1 answer
204 views

Three-and-Two (Santoitchi variant): Confused Knights

6 votes
1 answer
274 views

Super-derangement on a round table

6 votes
1 answer
198 views

5x5 Hidato with 4 single-digit clues

6 votes
1 answer
171 views

A hard(?) 15-X puzzle

5 votes
1 answer
348 views

Filling a rectangular grid with holes using tetrominoes

5 votes
2 answers
303 views

7x7 Knight's tour: Minimal proof for universality on black squares

5 votes
1 answer
435 views

Counting Tic-Tac-Toe draws on larger grids

4 votes
2 answers
332 views

Finding the root of a basic sequence

4 votes
2 answers
274 views

Lesser derangement on a round table

4 votes
1 answer
175 views

Curious statements about black cells on a grid

3 votes
1 answer
244 views

Cube Connect Challenges

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