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. Chalk
136
 00:06.49
2. coolcoolguy65
181
 00:08.66
3. DBWwushen
15
 00:14.44
4. GoldChoco36
172
 00:16.09
5. GeorgPfleger
101
 00:16.44
6. bantz
64
 00:16.46
7. Zemmel
159
 00:18.11
8. qobi
242
 00:18.31
9. Hahllyicssa
49
 00:18.32
10. airmo 00:18.97
11. willy86ylliw
67
 00:19.16
12. Nebbo 00:19.42
13. Mathilduuuuuus
10
 00:19.92
14. Boxerkk 00:21.32
15. biggi3
9
 00:22.05
16. Huwdu
3
 00:22.48
17. RichWoods 00:22.70
18. Kraehe 00:23.03
19. ilucas 00:23.11
20. cursed 00:23.25
This Week
1. Chalk
136
 00:06.49
2. coolcoolguy65
181
 00:08.66
3. GeorgPfleger
101
 00:16.53
4. qobi
242
 00:18.31
5. willy86ylliw
67
 00:19.16
6. Nebbo 00:19.42
7. Huwdu
3
 00:22.48
8. cursed 00:24.73
9. kevinguyen 00:24.99
10. Kraehe 00:25.91
11. RichWoods 00:26.81
12. airmo 00:27.28
13. rob69
24
 00:28.82
14. lanibani8
2
 00:29.56
15. Zemmel
159
 00:33.77
16. maken2ie22 00:34.15
17. Anoero
5
 00:35.85
18. dirkdiggler 00:35.92
19. Mieppert 00:40.34
20. Marcelow 00:44.75
Today
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MO3
1. coolcoolguy65
181
 00:07.99
2. zahhydude1
218
 00:08.04
3. vowels
216
 00:08.48
4. demian2
61
 00:08.79
5. Tobi Ente
137
 00:09.41
6. bearn
206
 00:09.79
7. JZE
88
 00:10.15
8. PuzzleMaestro
105
 00:10.38
9. numbrr
325
 00:10.46
10. ypw19
94
 00:10.73
AO5
1. zahhydude1
218
 00:08.32
2. coolcoolguy65
181
 00:09.28
3. vowels
216
 00:09.47
4. demian2
61
 00:09.82
5. JZE
88
 00:10.15
6. Tobi Ente
137
 00:10.32
7. numbrr
325
 00:10.79
8. bearn
206
 00:11.41
9. PuzzleMaestro
105
 00:11.88
10. ypw19
94
 00:12.20
AO12
1. zahhydude1
218
 00:10.30
2. vowels
216
 00:10.59
3. coolcoolguy65
181
 00:10.88
4. Tobi Ente
137
 00:12.08
5. numbrr
325
 00:12.44
6. bearn
206
 00:13.05
7. entenstein
5
 00:13.34
8. demian2
61
 00:13.78
9. PuzzleMaestro
105
 00:13.85
10. ypw19
94
 00:14.04
Robots / programmatic solversinfo  
1.dbut2
45
00:00.003
2.tlstyer
154
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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