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. Vicellen
15
 00:02.21
2. oli g
18
 00:02.83
3. ClementLauw 00:03.11
4. Andymeow 00:03.40
5. brtjpk
7
 00:03.46
6. nessaim 00:03.47
7. Blobster
19
 00:03.58
8. Lucas Coquard
8
 00:03.61
9. dustinkst
5
 00:03.62
10. giotskh
182
 00:03.63
11. Arok
115
 00:03.65
12. FxdeSlxyr
4
 00:03.66
13. sillydomi
11
 00:03.91
14. bird
28
 00:03.93
15. siodmy
13
 00:03.96
16. CALVOMAN
3
 00:04.04
17. PrankHDevil 00:04.13
18. qobi
235
 00:04.15
19. hkjsf
155
 00:04.16
20. byrong28 00:04.22
This Week
1. ClementLauw 00:03.11
2. Andymeow 00:03.40
3. oli g
18
 00:03.61
4. dustinkst
5
 00:03.62
5. Alktus 00:04.42
6. Bryson519 00:04.43
6. rewewe 00:04.43
8. ebuckley1223
6
 00:04.57
9. HazmaT 00:04.64
10. FxdeSlxyr
4
 00:04.77
11. NaluXV1 00:04.86
12. GoodSpectre
15
 00:04.91
13. obsessica 00:04.94
14. seanmvrvrvvrth
4
 00:04.97
15. weewoo 00:05.07
16. shallwe
124
 00:05.18
17. Itstotallykyle
50
 00:05.20
18. Crazyiris
7
 00:05.42
19. Green.wolf._
10
 00:05.57
20. TomNook 00:05.70
Today
1. Bryson519 00:05.39
2. samronn 00:06.83
3. Young_Chen
2
 00:22.55
4.--- empty -----:--
5.--- empty -----:--
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
211
 00:01.45
2. vowels
216
 00:01.80
3. CYrZx123
55
 00:01.95
4. nabi
92
 00:02.07
5. demian2
61
 00:02.29
5. BingBongBob
108
 00:02.29
7. jaybrainer
258
 00:02.54
8. numbrr
311
 00:02.70
9.anonymous
11
 00:02.73
10. JZE
87
 00:02.79
AO5
1. zahhydude1
211
 00:01.56
2. vowels
216
 00:01.94
3. CYrZx123
55
 00:02.05
4. nabi
92
 00:02.21
5. BingBongBob
108
 00:02.40
6. demian2
61
 00:02.44
7. numbrr
311
 00:02.61
8. jaybrainer
258
 00:02.88
9.anonymous
11
 00:02.89
10. JZE
87
 00:03.01
AO12
1. zahhydude1
211
 00:01.74
2. vowels
216
 00:02.02
3. CYrZx123
55
 00:02.35
4. nabi
92
 00:02.41
5. demian2
61
 00:02.86
6. BingBongBob
108
 00:02.88
7.anonymous
11
 00:02.94
8. jaybrainer
258
 00:03.00
9. numbrr
311
 00:03.21
10. Vicell
9
 00:03.30
Robots / programmatic solversinfo  
1.tlstyer
142
00:00.006
2.Charlie Li
61
00:00.211
3.Paul Bismuth
1
00:01.045

* 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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