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
177
 00:06.67
2. Yuyinraoliang_1
18
 00:10.39
3. qobi
239
 00:12.58
4. Chen Jiakai
20
 00:13.01
5. dbot
22
 00:13.33
6. llmt9
100
 00:13.67
7. lanittt
24
 00:15.15
8. DBWwushen
14
 00:15.75
9. geyik
217
 00:16.59
10. Nebbo 00:16.99
11. HDXX123456789 00:17.50
12. GeorgPfleger
100
 00:17.54
13. DerekSomers 00:17.97
14. dbut2
41
 00:18.65
15. dave dave
12
 00:18.81
16. hideotter 00:19.24
17. Mintgumlover 00:20.48
18. elementz 00:20.52
19. ZervCz 00:20.68
20. Ruetto
6
 00:21.14
This Week
1. coolcoolguy65
177
 00:06.67
2. qobi
239
 00:14.77
3. DerekSomers 00:17.97
4. Nebbo 00:18.55
5. hideotter 00:19.24
6. GeorgPfleger
100
 00:19.79
7. Ruetto
6
 00:21.14
8. random_person
147
 00:21.58
9. Mintgumlover 00:22.41
10. seabastian 00:22.57
11. RichWoods 00:25.08
12. Einsteinus
126
 00:25.21
13. koe
15
 00:26.44
14. rob69
24
 00:29.73
15. Ricter 00:29.99
16. baely
46
 00:32.65
17. tonotono
32
 00:34.53
18. HaileeWallace
6
 00:35.13
19. Kraehe 00:39.05
20. popopopop123 00:39.44
Today
1. RichWoods 00:32.77
2. tonotono
32
 00:47.43
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MO3
1. coolcoolguy65
177
 00:07.99
2. zahhydude1
217
 00:08.04
3. vowels
216
 00:08.48
4. demian2
61
 00:08.79
5. Tobi Ente
135
 00:09.41
6. bearn
206
 00:09.79
7. JZE
88
 00:10.15
8. PuzzleMaestro
97
 00:10.38
9. numbrr
321
 00:10.46
10. ypw19
92
 00:10.73
AO5
1. zahhydude1
217
 00:08.32
2. vowels
216
 00:09.47
3. coolcoolguy65
177
 00:09.52
4. demian2
61
 00:09.82
5. JZE
88
 00:10.15
6. Tobi Ente
135
 00:10.32
7. numbrr
321
 00:10.79
8. bearn
206
 00:11.41
9. PuzzleMaestro
97
 00:11.88
10. ypw19
92
 00:12.20
AO12
1. zahhydude1
217
 00:10.30
2. vowels
216
 00:10.59
3. coolcoolguy65
177
 00:11.52
4. Tobi Ente
135
 00:12.08
5. numbrr
321
 00:12.44
6. bearn
206
 00:13.05
7. entenstein
5
 00:13.34
8. demian2
61
 00:13.78
9. PuzzleMaestro
97
 00:13.85
10. ypw19
92
 00:14.04
Robots / programmatic solversinfo  
1.dbut2
41
00:00.003
2.tlstyer
151
00:00.006
3.Charlie Li
61
00:00.208

* 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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