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
23
 00:24.87
2. PuzzleMaestro
105
 00:29.14
3. bigjimfridge
66
 00:29.87
4. GeorgPfleger
101
 00:34.79
5. Luke Pickett
84
 00:34.80
6. teacherW66 00:35.32
7. qobi
242
 00:36.88
8. Zemmel
159
 00:37.19
9. bantz
64
 00:39.26
10. gacha160
5
 00:46.70
11. L0S3RPUP
55
 00:47.57
12. Dorice
274
 00:47.90
13. percisbetter
8
 00:47.92
14. Pitcheroy 00:53.90
15. chube 00:57.35
16. HotBlondesNearU
1
 00:57.76
17. absolbot#6708
20
 00:58.88
18. paule02 01:02.37
19. Hahllyicssa
49
 01:13.50
20. AndyHu
12
 01:15.56
This Week
1. PuzzleMaestro
105
 00:29.14
2. GeorgPfleger
101
 00:34.79
3. teacherW66 00:35.32
4. qobi
242
 00:37.92
5. paule02 01:02.37
6. maken2ie22 01:18.14
7. rob69
24
 01:38.25
8. spaghetti of jxm
20
 02:59.93
9. solverk
8
 03:02.45
10. Marcelow 05:17.13
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Today
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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. numbrr
325
 00:20.86
7. Luke Pickett
84
 00:21.10
8. JZE
88
 00:21.12
9. ypw19
94
 00:23.47
10. Icay
200
 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. numbrr
325
 00:23.97
8. Luke Pickett
84
 00:24.15
9. ypw19
94
 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. numbrr
325
 00:29.02
6. ypw19
94
 00:29.47
7. JZE
88
 00:29.51
8. Luke Pickett
84
 00:30.50
9. Icay
200
 00:31.14
10. qqwref
266
 00:32.21
Robots / programmatic solversinfo  
1.dbut2
45
00:00.003
2.tlstyer
154
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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