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. numbrr
315
 00:43.33
3. DukeAmsterdam
77
 00:44.71
4. oli g
24
 00:52.74
5. elinor0406 00:54.58
6. nessaim 00:55.87
7. Cormachine 00:59.90
8. obsessica 01:02.23
9. 耒Donatien豕
6
 01:02.90
10. xSaqe
20
 01:03.58
11. miggy
160
 01:04.83
12. Jaro00 01:06.05
13. CamPuzzle
16
 01:07.91
14. laozi 01:09.67
15. loser.emi
20
 01:10.24
16. waitwhoislaura
19
 01:10.81
17. bantz
33
 01:11.34
18. supertf
22
 01:13.34
19. rosebowl731
19
 01:13.74
20. dave dave
10
 01:14.85
This Week
1. coolcoolguy65
174
 00:28.67
2. elinor0406 00:54.58
3. oli g
24
 00:58.59
4. 耒Donatien豕
6
 01:02.90
5. CamPuzzle
16
 01:07.91
6. waitwhoislaura
19
 01:10.81
7. bantz
33
 01:11.34
8. ElPatron
18
 01:18.40
9. SniffTO 01:21.93
10. Xiantos 01:23.02
11. Stacker 01:23.74
12. micizl
17
 01:24.44
13. konna12 01:25.43
14. hollow_
6
 01:25.44
15. Jaro00 01:26.33
16. Hjaka14
23
 01:26.89
17. obsessica 01:28.38
18. spaceranger9112
16
 01:29.33
19. GeorgPfleger
96
 01:29.72
20. tobitobitobi24
8
 01:31.42
Today
1. CamPuzzle
16
 01:07.91
2. bantz
33
 01:11.34
3. oli g
24
 01:21.01
4. Xiantos 01:23.02
5. cansie 01:35.12
6. silura 01:38.43
7. ElPatron
18
 01:40.59
8. leosudest 01:45.22
9. darah34 01:47.74
10. Colleen2023 02:06.54
11. JacquesLePivain
6
 02:12.08
12. FunStuffXD
12
 02:32.17
13. faded 02:33.41
14. Elonger 02:56.64
15. karlutxo
8
 03:43.21
16. Maialeela 04:15.19
17. awaryanka 04:18.52
18. MohammedAl
8
 04:32.69
19. slymn 06:01.34
20. jay343932
2
 06:16.95
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
235
 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
107
 01:16.44
Robots / programmatic solversinfo  
1.tlstyer
144
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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