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.

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Shikaku


5x5 Shikaku | 7x7 Shikaku | 10x10 Shikaku | 15x15 Shikaku | 20x20 Shikaku | 25x25 Shikaku

This Month
1. Vicellen
15
 00:02.62
2. flaccoofshikaku 00:03.10
3. Aditzu 00:03.23
4. Calvin Anderson
5
 00:03.35
5. Yuyinraoliang
60
 00:03.62
6. kroller
18
 00:03.65
7. lxy082 00:03.80
8. bartus 00:03.81
9. 131a562
16
 00:03.85
10. Green.wolf._
9
 00:03.88
11. ducky3 00:04.13
12. MushroomsCavern
53
 00:04.43
13. Jered Francisco
3
 00:04.44
14. rhyde27
13
 00:04.46
15. Sokovik
24
 00:04.47
16. qobi
234
 00:04.51
17. sh3llb33 00:04.56
18. leking
4
 00:04.60
18. Dorice
262
 00:04.60
20. rosebowl731
8
 00:04.67
This Week
1. flaccoofshikaku 00:03.10
2. Aditzu 00:03.23
3. Calvin Anderson
5
 00:03.35
4. Yuyinraoliang
60
 00:03.62
5. bartus 00:03.81
6. Jered Francisco
3
 00:04.44
7. sh3llb33 00:04.56
8. leking
4
 00:04.60
9. rosebowl731
8
 00:04.67
10. Dorice
262
 00:04.79
11. Owen Brown
3
 00:04.81
12. UwUwhaduido
19
 00:04.86
13. GeorgPfleger
95
 00:04.92
13. niunia 00:04.92
15. xncy
5
 00:04.95
16. Antek Karabinov
4
 00:05.01
17. elreyneo 00:05.02
18. Impxctz
7
 00:05.03
19. Itseemslikeme 00:05.12
20. SophieK
53
 00:05.15
Today
1. Calvin Anderson
5
 00:03.35
2. Owen Brown
3
 00:04.81
3. skybolt1
1
 00:09.17
4. JerryG 00:26.63
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
252
 00:02.54
8. numbrr
308
 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
308
 00:02.61
8. jaybrainer
252
 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
252
 00:03.00
9. numbrr
308
 00:03.21
10. Vicell
9
 00:03.30
Robots / programmatic solversinfo  
1.tlstyer
141
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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2026-02-24 02:50:21

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