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. dimitar243 00:42.31
3. NunSmacker 00:46.76
4. cyrex45
24
 00:48.33
5. rosepetals
34
 00:51.97
6. krep12345 00:56.57
7. Layfort 00:57.09
8. bantz
62
 01:05.89
9. gotFunk 01:08.25
10. oli g
35
 01:08.34
11. BurakEBubuGül
13
 01:17.86
12. dirkdiggler 01:21.20
13. WaaA5149 01:22.68
14. lazysloth 01:24.66
15. Liliumauratum
47
 01:24.99
16. noahtheboa 01:25.51
17. Nurr
25
 01:26.65
18. charwood 01:26.95
19. kazanok
22
 01:27.36
20. GraceL
39
 01:27.73
This Week
1. NunSmacker 00:46.90
2. cyrex45
24
 00:48.33
3. dimitar243 00:49.22
4. Layfort 00:57.09
5. rosepetals
34
 01:07.11
6. gotFunk 01:08.25
7. dirkdiggler 01:21.20
8. lazysloth 01:24.66
9. mimer 01:29.79
10. kazanok
22
 01:32.67
11. A K
27
 01:36.91
12. charwood 01:43.94
13. Streez
8
 01:48.34
14. GeorgPfleger
101
 01:53.60
15. NihemT
34
 02:00.47
16. Zemmel
157
 02:17.12
17. Nurr
25
 02:39.29
18. AlinaEvstrat
7
 02:41.23
19. parasite01
10
 02:57.20
20. Qian_from_China
162
 03:06.53
Today
1. rosepetals
34
 01:07.11
2. Layfort 01:16.93
3. avishK
18
 03:27.66
4.--- empty -----:--
5.--- empty -----:--
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
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
45
00:00.003
2.tlstyer
152
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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