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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