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Glass Skyscraper Sudoku(P2)

Place the digits from 1 tot 9 in every row, column and 3x3-block. Every digit represents a skyscraper with the same height. Clues outside the grid indicate the number of visible skyscrapers from that side. Higher skyscrapers block the view of lower ones.

There are 8 glass skyscrapers, of heights 2~9 with no repeat. Glass skyscrapers do not block the view, so, if you see the glass buildingitself, it will also be counted.

A group of skyscrapers is 123947658. The glass skyscrapers in this row are 9, 7, 6. From the left side, the skyscrapers you can see are 1|2|3|9|4|7|6|5|8, the number of skyscraper observations is 9. From the right side, the skyscrapers you can see are 8|9, and the number of skyscraper observations is 2.

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