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Top Questions

3 votes
1 answer
15 views

Dissect a square grid into four congruent polyominos of same perimeter as the square

0 votes
0 answers
34 views

Beating Harvard scientists

5 votes
1 answer
125 views

Square dissection into 4 congruent polygons with same perimeter length of square itself

25 votes
1 answer
718 views

A pair of Find-the-stars puzzles

8 votes
1 answer
318 views

Maze Run Puzzle 2.0

8 votes
0 answers
517 views

Two popular bright rivals

7 votes
2 answers
154 views

Is it possible to put a cooperative checkmate here in three moves?

8 votes
4 answers
368 views

Both, One, Neither… But With A Twist

4 votes
1 answer
346 views

2014 MIT Aquarium Hunt Puzzle #8

11 votes
2 answers
596 views

Make him shuffle most!

11 votes
2 answers
773 views

Filling a 6x6 square with tetronimoes

17 votes
8 answers
1k views

Both, One, Neither

8 votes
1 answer
686 views

Shortest closed path for pilgrims on planet Cube

0 votes
3 answers
519 views

Maze Run Puzzle

6 votes
2 answers
428 views

Making sense of a logic puzzle in Blue Prince parlor room

3 votes
0 answers
152 views

Murder mystery puzzle told through seven news articles [closed]

11 votes
1 answer
929 views

longest path in 10x10 grid

1 vote
1 answer
217 views

Can you determine the tasty item?

0 votes
0 answers
271 views

pilgrimage speed reference [closed]

29 votes
2 answers
1k views

A puzzling site... But what am I looking for?

3 votes
1 answer
494 views

Seconds in the balance

5 votes
1 answer
478 views

What do emotions have to do with it?

3 votes
1 answer
237 views

Breakfast, socks, and diseases

12 votes
2 answers
1k views

Dissect the almost 10x10 square into 4 congruent pieces.

3 votes
4 answers
199 views

A riddle for your time (7)

10 votes
1 answer
487 views
+50

Satisfying class choice preferences

1 vote
1 answer
119 views

Some concentric circles

3 votes
1 answer
113 views

Raven's matrix: circles with loops inside or outside

14 votes
7 answers
930 views

A phenomenal riddle

2 votes
2 answers
147 views

A riddle for your time (8)

10 votes
2 answers
823 views

Can you dissect a 5x9 rectangle into nine (or ten) rectangles and/or squares?

5 votes
1 answer
689 views

Fastest checkmate by castling

6 votes
7 answers
502 views

Web Site Log: logic grid

1 vote
3 answers
56k views

Use the numbers 8 6 4 2 = 25

8 votes
3 answers
637 views

Can you swap the positions of the 8 Chess bishops?

16 votes
2 answers
3k views

My Three Children

2 votes
1 answer
271 views

Word Search - Find the hidden words

13 votes
2 answers
361 views

The Flow of Time

3 votes
1 answer
382 views

How many chess pieces does it take to "cover" all spaces on a chessboard if you must have at least one of each type?

22 votes
10 answers
4k views

Flashlight and 8 batteries

37 votes
4 answers
18k views

How many chess pieces does it take to "cover" all spaces on a chessboard?

2 votes
0 answers
69 views

How to solve this Burr puzzle variation with tile rotation? [duplicate]

14 votes
1 answer
575 views

"Incomplete rectangles"

6 votes
1 answer
2k views

How to beat level 24 in Chessformer?

67 votes
9 answers
6k views

Find a straight tunnel


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