This weekend we have "

**Forsmarts 9th Anniversary Squared Contest**" in which all the puzzles are Four Squares. It reminded me one of the puzzle "Four Square" which I created for 11th 24Hr Championship in 2010. In the coming contest all the four squares have same puzzle but in the following puzzle all the four puzzles are different. Write your comments about this puzzle. Hopefully this puzzle will be good practice for weekend test.**"Four Square" Instructions:**

The four puzzle types in this part: Skyscrapers, Battleships, Tents and Snake all rely on clue numbers on the outside of the four puzzle grids. Find the missing clues that are shared between the grids so that all puzzles can be solved, and solve them.

**Skyscrapers**: Place digits 1-6 into the grid so that each digit appears exactly once in each row and in each column, and the clue numbers are the number of buildings that can be seen from the corresponding direction.

**Battleships:**Place the given fleet into the grid so that ships do not touch each other, not even diagonally. The clue numbers are the number of ship segments in the corresponding direction. Squares marked with ‘X’ can not contain any part of ship.

**Tents:**Locate the tents in the grid. Trees and tents appear in distinct pairs, in horizontally or vertically adjacent squares. Tents do not touch each other, not even diagonally. The clue numbers are the total number of tents in the corresponding direction.

**Snake:**Find a path of sequentially numbered and edge-connected squares starting from 1, passing through 10 and 24, and ending at 30 (1-12 for the example). The path cannot loop back or touch itself, not even diagonally. The clue numbers are the number of times the snake makes a 90-degree turn in the corresponding direction.

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