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. CamPuzzle
30
 00:23.51
2. qobi
238
 00:25.95
3. GoldChoco36
160
 00:28.61
4. NunSmacker 00:28.66
5. datn6a 00:31.99
6. obsessica 00:32.19
7. teacherW66 00:32.30
8. Lillenuusutaja 00:32.51
9. oli g
29
 00:33.09
10. Hedran
113
 00:33.98
11. bigjimfridge
58
 00:34.40
12. Kyra05
73
 00:35.19
13. Valou
20
 00:35.38
14. deathgnome
24
 00:37.26
15. EllyB 00:37.41
16. GeorgPfleger
99
 00:38.01
17. nyahr 00:38.10
18. andrjuha1753
12
 00:38.29
19. Oryn
179
 00:38.83
20. Chen Jiakai
20
 00:43.92
This Week
1. teacherW66 00:32.30
2. bigjimfridge
58
 00:34.40
3. Kyra05
73
 00:35.19
4. Valou
20
 00:35.38
5. EllyB 00:37.41
6. GeorgPfleger
99
 00:38.01
7. RandomHarryXD
2
 00:46.51
8. Boldizsar Horthy
19
 00:46.95
9. Lillenuusutaja 00:48.96
10. Hocam 00:51.33
11. huohuo2004
34
 00:52.43
12. venipede 00:56.98
13. dbut2
39
 00:59.04
14. FergyB20 00:59.93
15. Laurent26
6
 01:04.46
16. Dorice
270
 01:07.33
17. HDXX123456789 01:16.25
18. CroMa
95
 01:18.84
19. ssawooga 01:28.62
20. dmoney 01:43.07
Today
1. bigjimfridge
58
 00:35.82
2. RandomHarryXD
2
 00:46.51
3. GeorgPfleger
99
 01:02.50
4. akwill
2
 01:59.15
5. YUKIABYSS
10
 05:01.14
6.--- empty -----:--
7.--- empty -----:--
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
 00:17.66
2. vowels
216
 00:17.91
3. demian2
61
 00:19.43
4. coolcoolguy65
175
 00:19.84
5. bearn
206
 00:20.58
6. numbrr
321
 00:20.86
7. JZE
88
 00:21.12
8. Luke Pickett
75
 00:22.75
9. ypw19
91
 00:25.10
10. Icay
195
 00:25.90
AO5
1. vowels
216
 00:18.50
2. zahhydude1
215
 00:19.23
3. demian2
61
 00:21.11
4. coolcoolguy65
175
 00:21.75
5. JZE
88
 00:21.89
6. bearn
206
 00:22.87
7. numbrr
321
 00:23.97
8. Luke Pickett
75
 00:24.18
9. ypw19
91
 00:24.52
10. qqwref
266
 00:26.32
AO12
1. vowels
216
 00:22.07
2. zahhydude1
215
 00:24.21
3. coolcoolguy65
175
 00:25.09
4. bearn
206
 00:26.73
5. numbrr
321
 00:29.02
6. ypw19
91
 00:29.47
7. JZE
88
 00:29.51
8. Luke Pickett
75
 00:30.90
9. Icay
195
 00:31.14
10. qqwref
266
 00:32.21
Robots / programmatic solversinfo  
1.tlstyer
150
00:00.007
2.Charlie Li
61
00:00.213
3.Paul Bismuth
1
00:03.112

* 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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