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. ypw19
93
 00:12.45
2. bigjimfridge
65
 00:23.86
3. finnn
13
 00:29.54
4. huohuo2004
50
 00:34.03
5. Kukko
186
 00:34.93
6. llmt9
102
 00:35.10
7. GeorgPfleger
100
 00:36.52
8. MrMythicorn
121
 00:38.80
9. Dorice
272
 00:49.02
10. datn6a 00:49.80
11. edededed 00:50.23
12. murunkel
26
 00:51.32
13. NunSmacker 00:51.60
14. HotBlondesNearU
1
 00:51.78
15. seabastian 00:52.44
16. Akashiwaai
1
 00:55.54
17. L1dji
18
 00:57.79
18. random_person
151
 01:02.62
19. coleslaw
27
 01:03.27
19. kupadupa
16
 01:03.27
This Week
1. Kukko
186
 00:34.93
2. GeorgPfleger
100
 00:39.86
3. Dorice
272
 00:49.02
4. murunkel
26
 00:51.32
5. HotBlondesNearU
1
 00:51.78
6. KB1989 01:31.24
7. ScoutOG 01:44.56
8. xilli 01:51.39
9. Pandu32 02:03.75
10. 12345q1q2 02:08.91
11. Sheriruth
5
 02:15.25
12. Koakuma
54
 02:26.28
13. goblinthatlogic
37
 03:32.85
14. Minorin2 04:27.16
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Today
1. GeorgPfleger
100
 00:59.78
2. Minorin2 04:27.16
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MO3
1. coolcoolguy65
181
 00:16.97
2. zahhydude1
218
 00:17.66
3. vowels
216
 00:17.91
4. demian2
61
 00:19.43
5. bearn
206
 00:20.58
6.anonymous
322
 00:20.86
7. JZE
88
 00:21.12
8. Luke Pickett
82
 00:22.75
9. ypw19
93
 00:23.47
10. Icay
199
 00:25.90
AO5
1. coolcoolguy65
181
 00:18.26
2. vowels
216
 00:18.50
3. zahhydude1
218
 00:19.23
4. demian2
61
 00:21.11
5. JZE
88
 00:21.89
6. bearn
206
 00:22.87
7.anonymous
322
 00:23.97
8. Luke Pickett
82
 00:24.18
9. ypw19
93
 00:24.52
10. qqwref
266
 00:26.32
AO12
1. coolcoolguy65
181
 00:21.32
2. vowels
216
 00:22.07
3. zahhydude1
218
 00:24.21
4. bearn
206
 00:26.73
5.anonymous
322
 00:29.02
6. ypw19
93
 00:29.47
7. JZE
88
 00:29.51
8. Luke Pickett
82
 00:30.90
9. Icay
199
 00:31.14
10. qqwref
266
 00:32.21
Robots / programmatic solversinfo  
1.dbut2
44
00:00.003
2.tlstyer
151
00:00.007
3.Charlie Li
61
00:00.213

* 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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