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
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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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20.--- empty -----:--
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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