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. hgh
75
 00:07.50
2. qobi
242
 00:07.72
3. GoldChoco36
172
 00:07.75
4. Boxerkk 00:08.06
5. willy86ylliw
67
 00:08.34
6. GeorgPfleger
101
 00:08.49
7. HotBlondesNearU
1
 00:08.66
8. Pitcheroy 00:08.71
9. ziljo
20
 00:08.76
10. HCT635 00:09.15
11. Emzed
93
 00:09.18
12. Tabby_<3
39
 00:09.27
13. Zemmel
159
 00:09.28
14. ademovski
25
 00:09.42
15. Hahllyicssa
49
 00:09.86
16. ilucas 00:10.06
17. KiLLsTR3ak47
9
 00:10.12
18. DBWwushen
15
 00:11.01
19. lrcdd 00:11.59
20. BrunoValads
12
 00:11.60
This Week
1. willy86ylliw
67
 00:08.34
2. qobi
242
 00:08.38
3. GeorgPfleger
101
 00:08.49
4. hgh
75
 00:08.73
5. Tabby_<3
39
 00:09.27
6. Zemmel
159
 00:09.28
7. glubschi
31
 00:11.64
8. dirkdiggler 00:12.64
9. HotBlondesNearU
1
 00:14.04
10. Anoero
5
 00:19.86
11. Mieppert 00:20.02
12. solverk
8
 00:21.93
13. Wilykit
4
 00:37.27
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MO3
1. zahhydude1
218
 00:03.48
2. vowels
216
 00:03.81
3. demian2
61
 00:04.66
4. Vicellen
15
 00:04.70
5. numbrr
325
 00:04.92
6. coolcoolguy65
181
 00:04.93
7. BingBongBob
108
 00:05.15
8. JZE
88
 00:05.16
9. nabi
92
 00:05.27
10. mtanzer
140
 00:05.34
AO5
1. zahhydude1
218
 00:03.76
2. vowels
216
 00:03.88
3. demian2
61
 00:04.92
4. Vicellen
15
 00:05.06
5. numbrr
325
 00:05.32
6. BingBongBob
108
 00:05.39
7. nabi
92
 00:05.41
8. coolcoolguy65
181
 00:05.44
9. bearn
206
 00:05.55
10. JZE
88
 00:05.75
AO12
1. zahhydude1
218
 00:04.20
2. vowels
216
 00:04.91
3. BingBongBob
108
 00:05.84
4. coolcoolguy65
181
 00:05.85
5. Vicellen
15
 00:06.24
6. numbrr
325
 00:06.26
7. demian2
61
 00:06.31
8. JZE
88
 00:06.39
9. bearn
206
 00:06.41
10. Chalk
136
 00:06.73
Robots / programmatic solversinfo  
1.dbut2
45
00:00.003
2.tlstyer
154
00:00.006
3.Charlie Li
61
00:00.207

* 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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