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. CamPuzzle
30
 00:10.66
3. Chen Jiakai
20
 00:11.77
4. oli g
29
 00:12.73
5. Hedran
113
 00:13.19
6. Boxerkk 00:13.57
7. obsessica 00:13.96
8. austinz
122
 00:14.43
9. elementz 00:14.66
10. deathgnome
24
 00:14.77
11. Ricter 00:15.67
12. qobi
238
 00:15.87
13. NunSmacker 00:15.93
14. DBWwushen
11
 00:15.95
15. Alachas
37
 00:16.46
16. Oryn
179
 00:16.63
17. JohnMyth 00:17.08
18. FxdeSlxyr
7
 00:17.19
19. GeorgPfleger
99
 00:17.99
20. User1
80
 00:18.50
This Week
1. elementz 00:14.66
2. Chen Jiakai
20
 00:15.91
3. austinz
122
 00:16.22
4. HDXX123456789 00:19.05
5. TSabrinaL 00:19.15
6. Shikacouille 00:19.62
7. Dorice
270
 00:19.94
8. boiko
42
 00:20.23
9. GeorgPfleger
99
 00:20.44
10. FergyB20 00:20.77
11. Liounax 00:23.12
12. RichWoods 00:24.87
13. shoobs
14
 00:25.02
14. Whiispor 00:25.67
15. MrStark
8
 00:27.89
16. CroMa
95
 00:28.78
17. huohuo2004
34
 00:29.18
18. sirsamiboi
1
 00:29.99
19. obsessica 00:30.84
20. ssawooga 00:31.49
Today
1. TSabrinaL 00:19.15
2. Chen Jiakai
20
 00:19.79
3. GeorgPfleger
99
 00:21.74
4. Whiispor 00:25.67
5. RichWoods 00:25.80
6. Sebathom 00:31.67
7. JanJaeger
26
 01:00.31
8.--- empty -----:--
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
215
 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
94
 00:10.38
9. numbrr
321
 00:10.46
10. ypw19
91
 00:10.73
AO5
1. zahhydude1
215
 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
94
 00:11.88
9. coolcoolguy65
175
 00:12.11
10. ypw19
91
 00:12.20
AO12
1. zahhydude1
215
 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
94
 00:13.85
10. ypw19
91
 00:14.04
Robots / programmatic solversinfo  
1.tlstyer
150
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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