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. ludanin
16
 00:23.25
2. oli g
18
 00:25.47
3. sillydomi
10
 00:28.71
4. rosebowl731
15
 00:30.07
5. nessaim 00:30.72
6. apilki08 00:31.75
7. Dorice
265
 00:34.47
8. Parade
47
 00:34.78
9. hkjsf
155
 00:37.10
10. bantz
12
 00:37.33
11. GeorgPfleger
96
 00:37.59
12. vyslaud
17
 00:39.33
13. Kathirony
41
 00:39.41
14. Jake Hess
14
 00:39.46
15. SophieK
57
 00:39.50
16. ZIG656 00:39.68
17. teacherW66 00:42.70
18. ebuckley1223
5
 00:42.91
19. jessiem 00:43.12
20. qobi
235
 00:43.45
This Week
1. oli g
18
 00:32.04
2. bantz
12
 00:37.33
3. GeorgPfleger
96
 00:40.84
4. Dorice
265
 00:42.85
5. ebuckley1223
5
 00:42.91
6. obsessica 00:43.59
7. eonhochang
41
 00:44.89
8. Kathirony
41
 00:45.04
9. Nashy 00:49.43
10. teacherW66 00:49.70
11. NaluXV1 00:53.58
12. apilki08 00:56.05
13. cookiexx 00:59.33
14. legume 01:03.43
15. Thomme Peters
16
 01:04.80
16. ruusa
12
 01:07.00
17. Rocken 01:08.79
18. Itstotallykyle
50
 01:11.02
19. shhhhmbiote 01:13.52
20. Bryson519 01:17.57
Today
1. GeorgPfleger
96
 00:40.88
2. ebuckley1223
5
 00:42.91
3. eonhochang
41
 00:44.89
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. zahhydude1
211
 00:17.66
2. vowels
216
 00:17.91
3. demian2
61
 00:19.43
4. coolcoolguy65
173
 00:19.84
5. bearn
206
 00:20.58
6. numbrr
310
 00:20.86
7. JZE
87
 00:21.12
8. Luke Pickett
75
 00:22.75
9. ypw19
90
 00:25.10
10. Icay
195
 00:25.90
AO5
1. vowels
216
 00:18.50
2. zahhydude1
211
 00:19.23
3. demian2
61
 00:21.11
4. coolcoolguy65
173
 00:21.75
5. JZE
87
 00:21.89
6. bearn
206
 00:22.87
7. numbrr
310
 00:23.97
8. Luke Pickett
75
 00:24.18
9. ypw19
90
 00:24.52
10. qqwref
266
 00:26.32
AO12
1. vowels
216
 00:22.07
2. zahhydude1
211
 00:24.21
3. coolcoolguy65
173
 00:25.09
4. bearn
206
 00:26.73
5. numbrr
310
 00:29.02
6. ypw19
90
 00:29.47
7. JZE
87
 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
142
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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