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Hashi/Hashiwokakero puzzles

My database includes 13780 puzzles for the moment and I'm constantly generating more.

Rules:

1. Each circle with number must have as many lines from it as the number in the circle.
2. It is not allowed to have more than two lines between two circles.
3. The lines can not cross eachother.
4. All the lines must either go horizontal or vertical. It is not allowed to draw lines diagonally.
5. All lines must be connected.

For more information look at Wikipedia.

1307012 puzzles downloaded.

1 2 2 2 2 2 2
1 2 3
2 2 4 1 5 4 1 2
2 1 1 1 3 4
2 5 3 1 2
2 3 5 6 7 5
3 2 1 1 1 2
2 1 2 2 2
5 5 4 5 7 6 3
2 1 2 2
2 2 6 8 5
3 4 5 2 2
2 1 2 5 6 1
4 7 3 1 2 4
2 1 6 2 2 1
2 4 1 1 1
2 2 2 2 2 2 2
Showing puzzle number: 4068
Difficulty: Medium
Solution methods:
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