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. Whoname 00:38.17
2. oli g
23
 00:38.90
3. obsessica 00:41.68
4. ludanin
16
 00:45.27
5. caelum 00:45.71
6. dave dave
9
 00:50.78
7. laozi 00:53.13
8. sillydomi
11
 00:53.98
9. MushroomsCavern
68
 00:53.99
10. bantz
29
 00:58.17
11. Thomme Peters
18
 00:58.76
11. qobi
235
 00:58.76
13. GeorgPfleger
96
 00:59.01
14. nyahr 01:01.79
15. Shaun135 01:11.33
16. Tabby_<3
26
 01:11.39
17. hkjsf
158
 01:13.26
18. Odenzon
27
 01:14.94
19. half-releaser
11
 01:19.74
20. Dorice
267
 01:20.99
This Week
1. caelum 00:50.06
2. oli g
23
 00:50.18
3. dave dave
9
 00:50.78
4. laozi 00:53.13
5. nyahr 01:01.79
6. GeorgPfleger
96
 01:03.96
7. obsessica 01:04.10
8. Thomme Peters
18
 01:05.48
9. Tabby_<3
26
 01:11.39
10. maxsr0 01:27.51
11. finnn 01:30.21
12. magare
16
 01:39.27
13. spaceranger9112
7
 01:42.03
14. firewoorks 01:44.86
15. Ricter 01:47.44
16. nbapip 01:47.49
17. ellars
1
 01:55.06
18. bental 01:56.83
19. Lucycc 02:03.00
20. htjones34
41
 02:05.56
Today
1. dave dave
9
 00:50.78
2. GeorgPfleger
96
 01:03.96
3. Thomme Peters
18
 01:17.00
4. spaceranger9112
7
 01:42.03
5. Ricter 01:47.44
6. ellars
1
 01:55.06
7. bental 01:56.83
8. thejmase 02:10.84
9. shhhhmbiote 02:20.21
10. NetPedet
3
 03:40.44
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. coolcoolguy65
174
 00:27.60
2. vowels
216
 00:31.91
3. bearn
206
 00:35.40
4. zahhydude1
212
 00:35.59
5. demian2
61
 00:35.74
6. numbrr
314
 00:35.88
7. ypw19
91
 00:35.90
8. JZE
87
 00:38.08
9. sfumato
166
 00:42.83
10. Icay
195
 00:42.93
AO5
1. coolcoolguy65
174
 00:30.02
2. vowels
216
 00:31.91
3. JZE
87
 00:37.20
4. demian2
61
 00:37.73
5. zahhydude1
212
 00:37.79
6. numbrr
314
 00:38.80
7. bearn
206
 00:38.87
8. Icay
195
 00:43.17
9. TheUgly
270
 00:43.38
10. ypw19
91
 00:43.46
AO12
1. coolcoolguy65
174
 00:37.11
2. vowels
216
 00:39.61
3. zahhydude1
212
 00:43.79
4. JZE
87
 00:44.03
5. numbrr
314
 00:44.37
6. bearn
206
 00:44.46
7. Icay
195
 00:49.29
8. ypw19
91
 00:52.89
9. mtanzer
140
 00:54.07
10. TheUgly
270
 00:56.03
Robots / programmatic solversinfo  
1.tlstyer
143
00:00.007
2.Charlie Li
61
00:00.222
3.Paul Bismuth
1
00:04.179

* 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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