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. Chalk
137
 00:06.49
2. coolcoolguy65
182
 00:06.77
3. Tobi Ente
138
 00:07.11
4. miggy
172
 00:09.15
5. GavinRose
13
 00:12.56
6. geyik
225
 00:14.18
7. pilott
29
 00:14.21
8. DBWwushen
15
 00:14.44
9. Layfort 00:15.76
10. GoldChoco36
175
 00:16.09
11. qobi
243
 00:16.16
12. GeorgPfleger
102
 00:16.44
13. bantz
65
 00:16.46
14. dirkdiggler 00:16.63
15. cursed 00:17.25
16. willy86ylliw
69
 00:17.30
17. dbut2
49
 00:17.66
18. Zemmel
159
 00:18.11
19. Dorice
274
 00:18.17
20. latent 00:18.95
This Week
1. coolcoolguy65
182
 00:06.77
2. miggy
172
 00:09.15
3. qobi
243
 00:16.16
4. cursed 00:17.25
5. GeorgPfleger
102
 00:17.32
6. dbut2
49
 00:17.66
7. Dorice
274
 00:18.17
8. willy86ylliw
69
 00:20.35
9. mts55
46
 00:21.30
10. RichWoods 00:21.52
11. Kraehe 00:24.73
12. kevinguyen 00:24.79
13. wallickdeez
31
 00:26.92
14. Mieppert 00:28.44
15. waterstone
88
 00:28.89
16. rob69
25
 00:42.93
17. GrumbobPuzzle
2
 03:41.90
18. ElfinLemur
1
 1:59:14.16
19. vyrmin
8
 24d 20:31:23.64
20.--- empty -----:--
Today
1. miggy
172
 00:09.15
2. Dorice
274
 00:18.17
3. willy86ylliw
69
 00:21.17
4. RichWoods 00:23.17
5. GeorgPfleger
102
 00:23.41
6. kevinguyen 00:26.80
7. rob69
25
 00:47.64
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. coolcoolguy65
182
 00:07.99
2. zahhydude1
218
 00:08.04
3. vowels
216
 00:08.48
4. demian2
61
 00:08.79
5. Tobi Ente
138
 00:09.41
6. bearn
207
 00:09.79
7. JZE
88
 00:10.15
8. PuzzleMaestro
107
 00:10.38
9. numbrr
325
 00:10.46
10. ypw19
94
 00:10.73
AO5
1. coolcoolguy65
182
 00:08.23
2. zahhydude1
218
 00:08.32
3. vowels
216
 00:09.47
4. demian2
61
 00:09.82
5. JZE
88
 00:10.15
6. Tobi Ente
138
 00:10.32
7. numbrr
325
 00:10.79
8. bearn
207
 00:11.41
9. PuzzleMaestro
107
 00:11.88
10. ypw19
94
 00:12.20
AO12
1. zahhydude1
218
 00:10.30
2. coolcoolguy65
182
 00:10.42
3. vowels
216
 00:10.59
4. Tobi Ente
138
 00:12.08
5. numbrr
325
 00:12.44
6. bearn
207
 00:13.05
7. entenstein
5
 00:13.34
8. demian2
61
 00:13.78
9. PuzzleMaestro
107
 00:13.85
10. ypw19
94
 00:14.04
Robots / programmatic solversinfo  
1.dbut2
49
00:00.003
2.tlstyer
156
00:00.006
3.Charlie Li
61
00:00.208

* 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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