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. EllyB 00:30.13
2. qobi
238
00:30.73
3. oli g
30
00:32.05
4. obsessica 00:32.19
5. teacherW66 00:32.30
6. Hedran
114
00:33.98
7. bigjimfridge
60
00:34.40
8. Kyra05
73
00:35.19
9. Valou
29
00:35.38
10. GeorgPfleger
99
00:38.01
11. datn6a 00:38.98
12. AREYOUREADYKID 00:41.85
13. TSabrinaL 00:46.49
14. RandomHarryXD
2
00:46.51
15. Boldizsar Horthy
20
00:46.95
16. .hata.
29
00:47.80
17. smokybart 00:47.95
18. ChanTianjie
13
00:48.46
19. Lillenuusutaja 00:48.96
20. dsdat 00:49.03
This Week
1. qobi
238
00:30.73
2. bigjimfridge
60
00:34.58
3. teacherW66 00:36.41
4. AREYOUREADYKID 00:41.85
5. dsdat 00:50.62
6. Odenzon
37
00:51.73
7. GeorgPfleger
99
00:53.48
8. llmt9
98
00:55.02
9. aliens
8
00:55.66
10. tortii
1
00:59.65
11. mh2525 01:15.36
12. lennian123 01:18.11
13. FunAcroFly
135
01:39.03
14. oklart 01:56.03
15. Sigmakelley1856
2
03:58.41
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Today
1. teacherW66 00:42.64
2. GeorgPfleger
99
00:53.48
3.--- empty -----:--
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
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MO3
1. zahhydude1
215
00:17.66
2. vowels
216
00:17.91
3. demian2
61
00:19.43
4. coolcoolguy65
176
00:19.84
5. bearn
206
00:20.58
6. numbrr
321
00:20.86
7. JZE
88
00:21.12
8. Luke Pickett
75
00:22.75
9. ypw19
92
00:25.10
10. Icay
195
00:25.90
AO5
1. vowels
216
00:18.50
2. zahhydude1
215
00:19.23
3. demian2
61
00:21.11
4. coolcoolguy65
176
00:21.75
5. JZE
88
00:21.89
6. bearn
206
00:22.87
7. numbrr
321
00:23.97
8. Luke Pickett
75
00:24.18
9. ypw19
92
00:24.52
10. qqwref
266
00:26.32
AO12
1. vowels
216
00:22.07
2. zahhydude1
215
00:24.21
3. coolcoolguy65
176
00:25.09
4. bearn
206
00:26.73
5. numbrr
321
00:29.02
6. ypw19
92
00:29.47
7. JZE
88
00:29.51
8. Luke Pickett
75
00:30.90
9. Icay
195
00:31.14
10. qqwref
266
00:32.21
Robots / programmatic solversinfo  
1.tlstyer
150
00:00.007
2.Charlie Li
61
00:00.213
3.Paul Bismuth
1
00:03.112

* 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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