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
 00:44.49
2. DukeAmsterdam
78
 00:44.62
3. miggy
162
 00:52.85
4. supertf
33
 00:55.42
5. oli g
28
 00:55.80
6. elinor0406 00:56.09
7. Torlaine 00:58.06
8. vyslaud
19
 00:58.13
9. CamPuzzle
30
 00:58.53
10. daine
16
 00:58.64
11. obsessica 01:01.72
12. Hjaka14
25
 01:01.79
13. rosebowl731
22
 01:05.54
14. xzz1772 01:06.77
15. rosepetals 01:09.29
16. mausman72
24
 01:09.95
17. GLWrath
32
 01:11.46
18. yasharfly
4
 01:12.38
19. JacquesLePivain
6
 01:13.49
20. spaceranger9112
30
 01:13.68
This Week
1. miggy
162
 00:52.85
2. Torlaine 00:58.06
3. daine
16
 00:58.64
4. elinor0406 01:00.41
5. obsessica 01:01.72
6. Hjaka14
25
 01:01.79
7. rosepetals 01:09.29
8. GeorgPfleger
97
 01:15.50
8. bantz
51
 01:15.50
10. bschm1tty
9
 01:19.35
11. oli g
28
 01:19.50
12. konna12 01:20.83
13. MadraMor
161
 01:20.96
14. MisiMisi 01:21.52
15. Elliot20 01:22.32
16. noahtheboa 01:22.62
17. Oneirodynia 01:24.09
18. micizl
19
 01:26.02
19. SniffTO 01:27.48
20. supertf
33
 01:27.49
Today
1. miggy
162
 00:52.85
2. Whoname 01:37.45
3. GeorgPfleger
97
 02:39.66
4. Eva Mae
8
 02:49.63
5. SamThiele
7
 03:50.36
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
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
320
 00:56.76
7. tanginess
45
 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. keehaag
169
 01:00.96
6. qqwref
266
 01:01.66
7. JZE
88
 01:01.76
8.anonymous
62
 01:02.17
9. tanginess
45
 01:02.53
10. hoodxxc
237
 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
109
 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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