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. Tobi Ente
134
 00:07.93
2. Whoname 00:10.59
3. CamPuzzle
30
 00:10.66
4. Chen Jiakai
20
 00:11.77
5. oli g
29
 00:12.73
6. Hedran
111
 00:13.19
7. Boxerkk 00:13.57
8. obsessica 00:13.96
9. austinz
121
 00:14.43
10. deathgnome
23
 00:14.77
11. msimon27 00:15.32
12. Ricter 00:15.67
13. qobi
237
 00:15.87
14. NunSmacker 00:15.93
15. DBWwushen
11
 00:15.95
16. elementz 00:16.15
17. Alachas
37
 00:16.46
18. Oryn
179
 00:16.63
19. JohnMyth 00:17.08
20. FxdeSlxyr
7
 00:17.19
This Week
1. Tobi Ente
134
 00:07.93
2. oli g
29
 00:12.73
3. Boxerkk 00:13.57
4. obsessica 00:13.96
5. Chen Jiakai
20
 00:15.84
6. elementz 00:16.15
7. Valou
13
 00:18.63
8. datn6a 00:20.96
9. RichWoods 00:21.94
10. zhanglin1982
71
 00:22.61
11. iShouldStudy 00:22.89
12. austinz
121
 00:23.10
13. Rodin172 00:25.71
14. icantcount 00:25.76
15. fleecesnatcher 00:26.80
16. ondrasovka 00:27.18
17. nyahr 00:27.61
18. Ricter 00:27.81
19. Shikacouille 00:28.59
20. GeorgPfleger
99
 00:30.26
Today
1. elementz 00:17.40
2. datn6a 00:20.96
3. Chen Jiakai
20
 00:21.35
4. RichWoods 00:21.94
5. fleecesnatcher 00:36.35
6. Youri08
1
 00:41.01
7. happyago
5
 00:46.71
8. mh2525 01:04.77
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. zahhydude1
213
 00:08.04
2. vowels
216
 00:08.48
3. demian2
61
 00:08.79
4. Tobi Ente
134
 00:09.41
5. bearn
206
 00:09.79
6. coolcoolguy65
175
 00:10.12
7. JZE
88
 00:10.15
8. PuzzleMaestro
93
 00:10.38
9. numbrr
321
 00:10.46
10. ypw19
91
 00:10.73
AO5
1. zahhydude1
213
 00:08.32
2. vowels
216
 00:09.47
3. demian2
61
 00:09.82
4. JZE
88
 00:10.15
5. Tobi Ente
134
 00:10.32
6. numbrr
321
 00:10.79
7. bearn
206
 00:11.41
8. PuzzleMaestro
93
 00:11.88
9. coolcoolguy65
175
 00:12.11
10. ypw19
91
 00:12.20
AO12
1. zahhydude1
213
 00:10.30
2. vowels
216
 00:10.59
3. Tobi Ente
134
 00:12.08
4. numbrr
321
 00:12.44
5. bearn
206
 00:13.05
6. coolcoolguy65
175
 00:13.11
7. entenstein
5
 00:13.34
8. demian2
61
 00:13.78
9. PuzzleMaestro
93
 00:13.85
10. ypw19
91
 00:14.04
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.006
2.Charlie Li
61
00:00.208
3.Paul Bismuth
1
00:02.423

* 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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