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. AuroraSrc
50
 00:02.86
2. email74
40
 00:02.90
3. Idiot! ¯\_(ツ)_/¯
7
 00:03.07
4. Yuyinraoliang
61
 00:03.23
5. finnn
13
 00:03.37
6. HCT635 00:03.54
7. mimer 00:03.66
8. Seakulta 00:03.70
9. qobi
241
 00:03.86
10. llmt9
102
 00:04.01
11. yobert 00:04.05
12. GoldChoco36
168
 00:04.20
13. OneaTy
24
 00:04.23
14. Mieppert 00:04.44
15. vrd383 00:04.51
16. OrxhidCrimes
3
 00:04.52
17. Dorice
272
 00:04.54
18. Muhsal 00:04.62
19. Workz
10
 00:04.65
20. dirkdiggler 00:04.72
This Week
1. AuroraSrc
50
 00:02.86
2. Idiot! ¯\_(ツ)_/¯
7
 00:03.07
3. Yuyinraoliang
61
 00:03.23
4. email74
40
 00:03.25
5. HCT635 00:03.54
6. mimer 00:03.66
7. Mieppert 00:04.44
8. OrxhidCrimes
3
 00:04.52
9. highprime
153
 00:05.06
10. GeorgPfleger
101
 00:05.20
11. qobi
241
 00:05.29
12. Streez
7
 00:05.55
13. DivineToast
12
 00:05.56
14. collinlovesmareike
23
 00:05.93
15. AnnaMariaVivaldi
78
 00:06.14
16. Izzy777
2
 00:06.25
17. Qian_from_China
162
 00:06.73
18. Moola 00:07.10
19. L1dji
26
 00:07.55
20. JTofSpades
13
 00:07.59
Today
1. Mieppert 00:04.44
2. Streez
7
 00:05.55
3. GeorgPfleger
101
 00:06.54
4. Izzy777
2
 00:07.19
5. rob69
24
 00:07.86
6. Ingrid59
56
 00:11.52
7. dewsy
5
 00:13.38
8. 3kariMonka 00:16.56
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
218
 00:01.42
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. coolcoolguy65
181
 00:02.36
8. jaybrainer
277
 00:02.54
9.anonymous
322
 00:02.70
10.anonymous
11
 00:02.73
AO5
1. zahhydude1
218
 00:01.43
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. coolcoolguy65
181
 00:02.55
8.anonymous
322
 00:02.61
9. jaybrainer
277
 00:02.88
10.anonymous
11
 00:02.89
AO12
1. zahhydude1
218
 00:01.67
2. vowels
216
 00:02.02
3. CYrZx123
55
 00:02.35
4. nabi
92
 00:02.41
5. coolcoolguy65
181
 00:02.79
6. demian2
61
 00:02.86
7. BingBongBob
108
 00:02.88
8.anonymous
11
 00:02.94
9. jaybrainer
277
 00:03.00
10.anonymous
322
 00:03.21
Robots / programmatic solversinfo  
1.dbut2
45
00:00.003
2.tlstyer
152
00:00.006
3.Charlie Li
61
00:00.211

* 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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