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
175
 00:28.67
2. DukeAmsterdam
77
 00:44.62
3. elinor0406 00:54.58
4. supertf
27
 00:55.42
5. oli g
28
 00:55.80
6. vyslaud
18
 00:58.13
7. CamPuzzle
26
 00:58.53
8. 耒Donatien豕
6
 01:02.90
9. rosebowl731
22
 01:05.54
10. xzz1772 01:06.77
11. miggy
162
 01:08.29
12. mausman72
24
 01:09.95
13. waitwhoislaura
25
 01:10.81
14. bantz
47
 01:11.34
15. GLWrath
31
 01:11.46
16. yasharfly
4
 01:12.38
17. JacquesLePivain
6
 01:13.49
18. spaceranger9112
30
 01:13.68
19. shikakach 01:14.53
20. daniizhao
22
 01:15.80
This Week
1. coolcoolguy65
175
 00:44.49
2. DukeAmsterdam
77
 00:55.62
3. elinor0406 00:56.09
4. oli g
28
 00:58.61
5. supertf
27
 01:01.20
6. CamPuzzle
26
 01:08.82
7. GLWrath
31
 01:11.46
8. Alachas
35
 01:18.85
9. xzz1772 01:18.97
10. cyrex45
2
 01:19.74
11. Kryolight 01:27.17
12. bschm1tty
8
 01:27.23
13. TashiroMiraki
226
 01:27.26
14. !?
18
 01:27.70
15. ARDAK 01:28.46
16. Elliot20 01:32.77
17. rosepetals 01:34.62
18. Oneirodynia 01:38.48
19. Colleen2023 01:38.96
20. LegendExx 01:39.54
Today
1. wolnosaj 02:49.06
2. panchiparv 03:35.68
3.--- empty -----:--
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
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
175
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. demian2
61
 00:55.33
5. zahhydude1
212
 00:55.76
6. numbrr
319
 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
175
 00:36.86
2. vowels
216
 00:44.38
3. bearn
206
 00:53.87
4. zahhydude1
212
 00:57.56
5. keehaag
169
 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
236
 01:03.89
AO12
1. coolcoolguy65
175
 00:44.38
2. vowels
216
 00:51.97
3. bearn
206
 01:00.73
4. zahhydude1
212
 01:10.35
5. qqwref
266
 01:11.21
6.anonymous
62
 01:12.93
7. JZE
87
 01:13.36
8. keehaag
169
 01:15.01
9. DukeAmsterdam
77
 01:15.45
10. mp3some
109
 01:16.44
Robots / programmatic solversinfo  
1.tlstyer
148
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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