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
174
 00:28.67
2. DukeAmsterdam
77
 00:44.62
3. elinor0406 00:54.58
4. supertf
25
 00:55.42
5. oli g
27
 00:55.80
6. vyslaud
18
 00:58.13
7. CamPuzzle
25
 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. laozi 01:09.67
13. mausman72
24
 01:09.95
14. waitwhoislaura
22
 01:10.81
15. bantz
43
 01:11.34
16. yasharfly
4
 01:12.38
17. obsessica 01:12.86
18. JacquesLePivain
6
 01:13.49
19. spaceranger9112
25
 01:13.68
20. shikakach 01:14.53
This Week
1. supertf
25
 00:55.42
2. DukeAmsterdam
77
 00:55.62
3. vyslaud
18
 00:58.13
4. CamPuzzle
25
 00:58.53
5. oli g
27
 01:03.03
6. elinor0406 01:05.02
7. rosebowl731
22
 01:05.54
8. JacquesLePivain
6
 01:13.49
9. shikakach 01:14.53
10. xzz1772 01:18.97
11. Elliot20 01:22.49
12. SniffTO 01:24.36
13. LegendExx 01:25.02
14. Kryolight 01:27.17
15. TashiroMiraki
226
 01:27.26
16. 耒Donatien豕
6
 01:27.29
17. !?
17
 01:27.70
18. GLWrath
26
 01:27.85
19. Oneirodynia 01:28.26
20. ARDAK 01:28.46
Today
1. DukeAmsterdam
77
 00:55.62
2. elinor0406 01:20.89
3. CamPuzzle
25
 01:27.13
4. Kryolight 01:27.17
5. !?
17
 01:27.70
6. Elliot20 01:32.77
7. SniffTO 01:46.20
8. GLWrath
26
 01:49.70
9. cansie 01:51.95
10. supertf
25
 01:52.79
11. ARDAK 01:52.96
12. SandrDM1
55
 01:53.92
13. BratislavskýriderVl...
16
 02:05.35
14. allardos 02:10.82
15. micizl
18
 02:12.86
16. A K
17
 02:15.23
17. Colleen2023 02:20.84
18. czar519 02:36.84
19. markmata
7
 03:20.61
20. LovetoplayWiiU
8
 03:58.14
MO3
1. coolcoolguy65
174
 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
318
 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
174
 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
174
 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
108
 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.
You need to be logged in to track your averages

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