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. Tobi Ente
123
00:07.43
2. zebramachine 00:15.09
3. GeorgPfleger
89
00:15.52
4. jj3742 00:18.02
5. qobi
228
00:18.58
6. Rhododendron
134
00:20.06
7. RichWoods 00:20.59
8. Ruan
40
00:22.49
9. becka 00:23.73
10. KETJAK
32
00:28.71
11. Fish5417
20
00:29.14
12. leandroneckel 00:30.34
13. Rossi Foggy
3
00:30.74
14. 苏小葵
25
00:33.55
15. SergeiG 00:34.06
16. angelrose971
92
00:34.90
17. FISHPHANTASY
12
00:35.08
18. teacherW66 00:36.70
19. jaripetteri
84
00:37.87
20. HackMan
110
00:39.28
This Week
1. jj3742 00:18.02
2. GeorgPfleger
89
00:18.41
3. RichWoods 00:25.27
4. Fish5417
20
00:29.14
5. Rossi Foggy
3
00:30.74
6. mrgmath
6
00:43.60
7. FireTime
1
01:03.88
8. Mateo415 01:14.08
9. CLAVDIVS
58
02:25.16
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. GeorgPfleger
89
00:23.85
2. RichWoods 00:25.27
3. CLAVDIVS
58
02:25.16
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
195
00:08.04
2. vowels
216
00:08.48
3. demian2
61
00:08.79
4. bearn
206
00:09.79
5. Tobi Ente
123
00:09.97
6. coolcoolguy65
152
00:10.12
7. JZE
85
00:10.15
8. numbrr
298
00:10.50
9. Vicellen
14
00:12.39
10. haramey
230
00:12.60
AO5
1. zahhydude1
195
00:08.32
2. vowels
216
00:09.47
3. demian2
61
00:09.82
4. JZE
85
00:10.15
5. Tobi Ente
123
00:10.47
6. numbrr
298
00:10.79
7. bearn
206
00:11.41
8. coolcoolguy65
152
00:12.11
9. sfumato
166
00:12.97
10. qqwref
259
00:13.05
AO12
1. zahhydude1
195
00:10.30
2. vowels
216
00:10.59
3. Tobi Ente
123
00:12.08
4. bearn
206
00:13.05
5. coolcoolguy65
152
00:13.11
6. numbrr
298
00:13.35
7. demian2
61
00:13.78
8. JZE
85
00:14.26
9. qqwref
259
00:15.82
10. sfumato
166
00:16.09
Robots / programmatic solversinfo  
1.tlstyer
124
00:00.006
2.Charlie Li
61
00:00.208
3.Paul Bismuth
1
00:02.423

* 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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2025-07-30 10:02:32

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