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
178
 00:29.38
2. ypw19
93
 00:40.51
3. dimitar243 00:41.84
4. rosepetals
33
 00:49.52
5. Yuyinraoliang_1
18
 00:49.63
6. NunSmacker 00:51.75
7. tanginess
47
 00:54.46
8. gotFunk 00:54.57
9. cyrex45
15
 00:57.32
10. elinor0406 00:58.27
11. 耒Donatien豕
6
 00:59.26
12. daine
30
 00:59.86
13. dbot
22
 01:02.41
14. Hjaka14
27
 01:02.72
15. geyik
218
 01:06.54
16. sheezus
22
 01:07.21
17. GraceL
34
 01:07.40
18. konna12 01:08.17
19. SniffTO 01:10.80
20. hiiamweird
6
 01:15.73
This Week
1. ypw19
93
 00:40.51
2. coolcoolguy65
178
 00:42.10
3. dimitar243 00:47.24
4. rosepetals
33
 00:53.71
5. NunSmacker 00:56.88
6. cyrex45
15
 01:11.33
7. GraceL
34
 01:11.69
8. bantz
60
 01:16.40
9. GeorgPfleger
100
 01:16.69
10. expers 01:27.61
11. realp 01:36.53
12. WaaA5149 01:36.62
13. gethyped7 01:37.61
14. NihemT
28
 01:39.43
15. Nurr
21
 01:43.34
16. dbut2
41
 01:43.66
17. Ak57wastoosmol 01:46.94
18. wallickdeez
21
 01:54.23
19. qobi
240
 02:00.41
20. bwall007
25
 02:01.31
Today
1. GeorgPfleger
100
 02:15.24
2. amay1030 02:49.68
3. MrOof246
13
 04:47.98
4. dismemberedcorpse
3
 24d 20:31:23.64
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
178
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. ypw19
93
 00:49.02
5. demian2
61
 00:55.33
6. zahhydude1
217
 00:55.76
7. numbrr
321
 00:56.76
8. rosepetals
33
 00:57.60
9. tanginess
47
 00:57.73
10. qqwref
266
 00:57.96
AO5
1. coolcoolguy65
178
 00:36.86
2. vowels
216
 00:44.38
3. ypw19
93
 00:51.43
4. bearn
206
 00:53.87
5. zahhydude1
217
 00:57.56
6. rosepetals
33
 00:59.61
7. tanginess
47
 01:00.67
8. keehaag
169
 01:00.96
9. qqwref
266
 01:01.66
10. JZE
88
 01:01.76
AO12
1. coolcoolguy65
178
 00:44.38
2. vowels
216
 00:51.97
3. ypw19
93
 00:55.60
4. bearn
206
 01:00.73
5. dbot
22
 01:09.80
6. zahhydude1
217
 01:10.35
7. qqwref
266
 01:11.21
8.anonymous
62
 01:12.93
9. JZE
88
 01:13.36
10. keehaag
169
 01:15.01
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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