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
 00:24.64
2. DukeAmsterdam
77
 00:44.62
3. oli g
26
 00:53.34
4. elinor0406 00:54.58
5. nessaim 00:55.87
6. Cormachine 00:59.90
7. 耒Donatien豕
6
 01:02.90
8. miggy
161
 01:04.83
9. Jaro00 01:06.05
10. xzz1772 01:06.77
11. CamPuzzle
20
 01:07.91
12. laozi 01:09.67
13. waitwhoislaura
21
 01:10.81
14. bantz
39
 01:11.34
15. yasharfly
2
 01:12.38
16. obsessica 01:12.86
17. rosebowl731
20
 01:13.74
18. dave dave
12
 01:14.85
19. MartinOlejník
24
 01:15.42
20. daniizhao
14
 01:15.80
This Week
1. DukeAmsterdam
77
 00:44.62
2. coolcoolguy65
174
 00:47.96
3. oli g
26
 01:03.15
4. xzz1772 01:06.77
5. elinor0406 01:07.29
6. yasharfly
2
 01:12.38
7. daniizhao
14
 01:15.80
8. CamPuzzle
20
 01:21.54
9. _RavenStorm11
13
 01:23.09
10. silura 01:23.63
11. Lillenuusutaja 01:24.04
12. JacquesLePivain
6
 01:24.31
13. qobi
236
 01:24.84
14. vyslaud
18
 01:25.15
15. Clivie 01:25.19
16. Hjaka14
24
 01:25.57
17. cansie 01:27.42
18. mast3rfak3
12
 01:29.34
19. obsessica 01:30.44
20. Mpetran
8
 01:31.16
Today
1. elinor0406 01:20.68
2. CamPuzzle
20
 01:30.09
3. Clivie 01:30.12
4. JacquesLePivain
6
 01:31.05
5. infamousmauve 01:44.32
6. Mpetran
8
 01:50.11
7. NunSmacker 02:07.38
8. Colleen2023 02:08.85
9. Elliot20 02:22.02
10. LovetoplayWiiU
7
 02:28.22
11. Jamie Holland
18
 02:33.39
12. yiky2071 03:08.31
13. bwall007
5
 03:18.52
14. NetPedet
5
 03:19.07
15. ninosh
9
 03:21.79
16. downtownragdoll 03:27.76
17. shhhhmbiote 03:31.86
18. JenHen 04:45.40
19. nini854 05:04.97
20. karlutxo
9
 05:23.09
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
315
 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
145
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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