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
181
 00:21.37
2. ypw19
93
 00:40.51
3. dimitar243 00:42.31
4. NunSmacker 00:46.76
5. rosepetals
34
 00:51.97
6. cyrex45
22
 00:54.09
7. krep12345 00:56.57
8. Elliot20 01:05.70
9. bantz
61
 01:05.89
10. oli g
34
 01:08.34
11. GraceL
39
 01:12.25
12. GeorgPfleger
100
 01:16.69
13. BurakEBubuGül
13
 01:17.86
14. gotFunk 01:18.00
15. Layfort 01:18.49
16. WaaA5149 01:22.68
17. MuxxPedri 01:24.36
18. Liliumauratum
46
 01:24.99
19. noahtheboa 01:25.51
20. Nurr
22
 01:26.65
This Week
1. coolcoolguy65
181
 00:26.12
2. dimitar243 00:42.31
3. NunSmacker 00:46.76
4. oli g
34
 01:08.34
5. cyrex45
22
 01:10.24
6. rosepetals
34
 01:11.17
7. gotFunk 01:18.00
8. Layfort 01:18.49
9. noahtheboa 01:25.51
10. 임래정
58
 01:31.05
11. lazysloth 01:32.60
12. infamousmauve 01:35.56
13. GeorgPfleger
100
 01:36.21
14. jayfin
2
 01:39.54
15. charwood 01:39.67
16. Florion 01:43.34
17. dirkdiggler 01:47.55
18. WaaA5149 02:13.23
19. Dorice
272
 02:14.50
20. A K
26
 02:22.02
Today
1. coolcoolguy65
181
 00:26.12
2. cyrex45
22
 01:36.00
3. 임래정
58
 01:48.90
4. GeorgPfleger
100
 02:26.03
5. murunkel
26
 04:39.43
6. AnonyMouseman
39
 06:27.86
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
181
 00:32.42
2. vowels
216
 00:41.60
3. bearn
206
 00:45.18
4. ypw19
93
 00:49.02
5. demian2
61
 00:55.33
6. zahhydude1
218
 00:55.76
7.anonymous
322
 00:56.76
8. rosepetals
34
 00:57.60
9. tanginess
48
 00:57.73
10. qqwref
266
 00:57.96
AO5
1. coolcoolguy65
181
 00:36.86
2. vowels
216
 00:44.38
3. ypw19
93
 00:51.43
4. bearn
206
 00:53.87
5. zahhydude1
218
 00:57.56
6. rosepetals
34
 00:59.61
7. tanginess
48
 01:00.67
8. keehaag
169
 01:00.96
9. qqwref
266
 01:01.66
10. JZE
88
 01:01.76
AO12
1. coolcoolguy65
181
 00:42.27
2. vowels
216
 00:51.97
3. ypw19
93
 00:55.60
4. bearn
206
 01:00.73
5. dbot
22
 01:09.80
6. zahhydude1
218
 01:10.35
7. qqwref
266
 01:11.21
8.anonymous
62
 01:12.93
9. JZE
88
 01:13.36
10. keehaag
169
 01:15.01
Robots / programmatic solversinfo  
1.dbut2
44
00:00.003
2.tlstyer
151
00:00.008
3.Charlie Li
61
00:00.224

* 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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