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
175
 00:30.67
2. miggy
163
 00:52.85
3. tanginess
46
 00:52.99
4. supertf
38
 00:55.42
5. DukeAmsterdam
78
 00:55.62
6. elinor0406 00:56.09
7. oli g
29
 00:56.84
8. Torlaine 00:58.06
9. vyslaud
19
 00:58.13
10. CamPuzzle
30
 00:58.53
11. daine
23
 00:58.64
12. mast3rfak3
20
 01:01.25
13. obsessica 01:01.72
14. Hjaka14
25
 01:01.79
15. rosebowl731
23
 01:05.54
16. MisiMisi 01:07.32
17. Elliot20 01:07.53
18. NunSmacker 01:07.61
19. EllyB 01:08.96
20. rosepetals 01:09.29
This Week
1. tanginess
46
 00:52.99
2. miggy
163
 00:54.73
3. MisiMisi 01:07.32
4. Elliot20 01:07.53
5. EllyB 01:08.96
6. oli g
29
 01:09.28
7. rosepetals 01:09.92
8. NunSmacker 01:11.75
9. ethan1021
12
 01:13.84
10. bantz
53
 01:19.09
11. markmata
13
 01:20.54
12. Oneirodynia 01:22.02
13. deathgnome
23
 01:23.78
14. Stacker 01:23.85
15. wolnosaj 01:25.02
16. obsessica 01:29.91
17. GeorgPfleger
99
 01:33.70
18. infamousmauve 01:33.83
19. Frixio
21
 01:35.68
20. cansie 01:37.57
Today
1. Elliot20 01:07.53
2. NunSmacker 01:11.75
3. Oneirodynia 01:42.08
4. yiky2071 01:44.21
5. bigjimfridge
56
 02:19.74
6. ANALOPEZTT 02:22.68
7. xzz1772 02:23.12
8. WYJ
83
 04:10.82
9. thortilla 06:16.91
10. anonymmoon 08:13.13
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. coolcoolguy65
175
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. demian2
61
 00:55.33
5. zahhydude1
213
 00:55.76
6. numbrr
321
 00:56.76
7. tanginess
46
 00:57.73
8. qqwref
266
 00:57.96
9. JZE
88
 00:58.13
10. DukeAmsterdam
78
 00:59.11
AO5
1. coolcoolguy65
175
 00:36.86
2. vowels
216
 00:44.38
3. bearn
206
 00:53.87
4. zahhydude1
213
 00:57.56
5. tanginess
46
 01:00.67
6. keehaag
169
 01:00.96
7. qqwref
266
 01:01.66
8. JZE
88
 01:01.76
9.anonymous
62
 01:02.17
10. hoodxxc
238
 01:03.89
AO12
1. coolcoolguy65
175
 00:44.38
2. vowels
216
 00:51.97
3. bearn
206
 01:00.73
4. zahhydude1
213
 01:10.35
5. qqwref
266
 01:11.21
6.anonymous
62
 01:12.93
7. JZE
88
 01:13.36
8. keehaag
169
 01:15.01
9. DukeAmsterdam
78
 01:15.45
10. mp3some
110
 01:16.44
Robots / programmatic solversinfo  
1.tlstyer
148
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.
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