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. miggy
172
 00:21.05
2. PuzzleMaestro
107
 00:29.14
3. bigjimfridge
67
 00:30.95
4. GeorgPfleger
102
 00:34.79
5. teacherW66 00:35.32
6. Zemmel
159
 00:37.19
7. BurakEBubuGül
16
 00:37.46
8. qobi
243
 00:37.92
9. bantz
65
 00:39.26
10. wallickdeez
31
 00:46.51
11. percisbetter
8
 00:47.92
12. Dorice
275
 00:50.93
13. mts55
46
 00:52.38
14. Pitcheroy 00:53.90
15. HotBlondesNearU
1
 00:57.76
16. absolbot#6708
20
 00:58.88
17. teuveld 01:01.99
18. paule02 01:02.37
19. willy86ylliw
69
 01:04.71
20. igotyuandy
13
 01:15.56
This Week
1. miggy
172
 00:21.05
2. bigjimfridge
67
 00:30.95
3. BurakEBubuGül
16
 00:37.46
4. GeorgPfleger
102
 00:42.02
5. wallickdeez
31
 00:46.51
6. Dorice
275
 00:50.93
7. mts55
46
 00:52.38
8. teuveld 01:01.99
9. willy86ylliw
69
 01:31.11
10. GrumbobPuzzle
2
 10:15.96
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Today
1. GeorgPfleger
102
 00:44.91
2. bigjimfridge
67
 00:50.48
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MO3
1. coolcoolguy65
182
 00:16.97
2. zahhydude1
218
 00:17.66
3. vowels
216
 00:17.91
4. demian2
61
 00:19.43
5. bearn
207
 00:20.58
6. numbrr
325
 00:20.86
7. Luke Pickett
85
 00:21.10
8. JZE
88
 00:21.12
9. ypw19
94
 00:23.47
10. miggy
172
 00:25.66
AO5
1. coolcoolguy65
182
 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
207
 00:22.87
7. numbrr
325
 00:23.97
8. Luke Pickett
85
 00:24.15
9. ypw19
94
 00:24.52
10. qqwref
266
 00:26.32
AO12
1. coolcoolguy65
182
 00:21.32
2. vowels
216
 00:22.07
3. zahhydude1
218
 00:24.21
4. bearn
207
 00:26.73
5. numbrr
325
 00:29.02
6. ypw19
94
 00:29.47
7. JZE
88
 00:29.51
8. Luke Pickett
85
 00:30.50
9. Icay
202
 00:31.14
10. miggy
172
 00:31.88
Robots / programmatic solversinfo  
1.dbut2
49
00:00.003
2.tlstyer
156
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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