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
177
 00:28.26
2. rosepetals
31
 00:49.52
3. Yuyinraoliang_1
18
 00:49.63
4. dimitar243 00:51.71
5. NunSmacker 00:51.75
6. daine
29
 00:52.38
7. tanginess
47
 00:54.46
8. gotFunk 00:54.57
9. elinor0406 00:58.27
10. 耒Donatien豕
6
 00:59.26
11. dbot
22
 01:02.41
12. Hjaka14
27
 01:02.72
13. sheezus
20
 01:07.21
14. GraceL
28
 01:07.40
15. konna12 01:08.17
16. oxymiku 01:09.99
17. SniffTO 01:10.80
18. miggy
167
 01:11.55
19. geyik
217
 01:15.16
20. hiiamweird
6
 01:15.73
This Week
1. coolcoolguy65
177
 00:29.38
2. rosepetals
31
 00:55.81
3. daine
29
 00:59.86
4. 耒Donatien豕
6
 01:01.89
5. sheezus
20
 01:07.21
6. GraceL
28
 01:07.40
7. geyik
217
 01:15.16
8. mimer 01:17.47
9. Ak57wastoosmol 01:19.94
10. dbut2
41
 01:24.71
11. bwall007
24
 01:27.06
12. cyrex45
9
 01:28.59
13. Joseph12 01:30.62
14. NihemT
27
 01:33.43
15. GeorgPfleger
99
 01:35.41
16. bidnod 01:36.81
17. hugotim 01:38.12
18. Nurr
20
 01:38.40
19. realp 01:39.73
20. WaaA5149 01:40.02
Today
1. GraceL
28
 01:15.28
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9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
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20.--- empty -----:--
MO3
1. coolcoolguy65
177
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. demian2
61
 00:55.33
5. zahhydude1
216
 00:55.76
6. numbrr
321
 00:56.76
7. rosepetals
31
 00:57.60
8. tanginess
47
 00:57.73
9. qqwref
266
 00:57.96
10. JZE
88
 00:58.13
AO5
1. coolcoolguy65
177
 00:36.86
2. vowels
216
 00:44.38
3. bearn
206
 00:53.87
4. zahhydude1
216
 00:57.56
5. rosepetals
31
 00:59.61
6. tanginess
47
 01:00.67
7. keehaag
169
 01:00.96
8. qqwref
266
 01:01.66
9. JZE
88
 01:01.76
10.anonymous
62
 01:02.17
AO12
1. coolcoolguy65
177
 00:44.38
2. vowels
216
 00:51.97
3. bearn
206
 01:00.73
4. dbot
22
 01:09.80
5. zahhydude1
216
 01:10.35
6. qqwref
266
 01:11.21
7.anonymous
62
 01:12.93
8. JZE
88
 01:13.36
9. keehaag
169
 01:15.01
10. DukeAmsterdam
78
 01:15.45
Robots / programmatic solversinfo  
1.dbut2
41
00:00.003
2.tlstyer
151
00:00.008
3.Charlie Li
61
00:00.224

* 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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