Shikaku


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Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial
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Shikaku


5x5 Shikaku | 7x7 Shikaku | 10x10 Shikaku | 15x15 Shikaku | 20x20 Shikaku | 25x25 Shikaku

New Puzzle
This Month
1. coolcoolguy65
173
 00:25.58
2. oli g
18
 00:40.93
3. numbrr
310
 00:43.33
4. DukeAmsterdam
77
 00:44.71
5. vyslaud
17
 00:56.21
6. miggy
158
 01:04.31
7. sillydomi
10
 01:04.39
8. obsessica 01:07.97
9. MightyPig714 01:08.87
10. supertf
21
 01:09.79
11. PrankHDevil 01:10.81
12. 9jason
12
 01:12.75
13. Jtf2 _PT
10
 01:13.26
14. Kecso 01:14.39
15. nessaim 01:15.81
16. dave dave
3
 01:16.20
17. bantz
12
 01:16.35
18. rosebowl731
15
 01:17.10
19. ewnoodle
14
 01:17.30
20. elinor0406 01:17.52
This Week
1. coolcoolguy65
173
 00:27.45
2. numbrr
310
 00:43.33
3. DukeAmsterdam
77
 00:44.71
4. miggy
158
 01:04.31
5. oli g
18
 01:06.08
6. obsessica 01:07.97
7. supertf
21
 01:13.34
8. dave dave
3
 01:16.20
9. bantz
12
 01:16.35
10. elinor0406 01:17.52
11. Jaro00 01:18.63
12. niamhjoy 01:18.71
13. ebuckley1223
5
 01:20.59
14. Hjaka14
20
 01:23.20
15. rateπR
20
 01:28.86
16. xncy
12
 01:29.06
17. eonhochang
41
 01:35.69
18. loser.emi
15
 01:35.88
19. noahtheboa 01:36.21
20. Tabby_<3
17
 01:36.57
Today
1. eonhochang
41
 01:35.69
2. xzz1772 01:45.05
3. loser.emi
15
 01:58.58
4. ebuckley1223
5
 02:16.90
5. Robin Vahi
8
 02:22.21
6. GeorgPfleger
96
 02:36.32
7. Concerto 03:05.08
8. np010
8
 03:37.31
9. INOKAAAA 07:09.30
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. coolcoolguy65
173
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. demian2
61
 00:55.33
5. zahhydude1
211
 00:55.76
6. numbrr
310
 00:56.76
7. tanginess
45
 00:57.73
8. qqwref
266
 00:57.96
9. JZE
87
 00:58.13
10. DukeAmsterdam
77
 00:59.11
AO5
1. coolcoolguy65
173
 00:36.86
2. vowels
216
 00:44.38
3. bearn
206
 00:53.87
4. zahhydude1
211
 00:57.56
5. keehaag
168
 01:00.96
6. qqwref
266
 01:01.66
7. JZE
87
 01:01.76
8.anonymous
62
 01:02.17
9. tanginess
45
 01:02.53
10. hoodxxc
234
 01:03.89
AO12
1. coolcoolguy65
173
 00:44.38
2. vowels
216
 00:51.97
3. bearn
206
 01:00.73
4. zahhydude1
211
 01:10.35
5. qqwref
266
 01:11.21
6.anonymous
62
 01:12.93
7. JZE
87
 01:13.36
8. keehaag
168
 01:15.01
9. DukeAmsterdam
77
 01:15.45
10. mp3some
105
 01:16.44
Robots / programmatic solversinfo  
1.tlstyer
142
00:00.008
2.Charlie Li
61
00:00.224
3.Paul Bismuth
1
00:07.037

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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