Logic puzzles

This new puzzle comes on an occasion that is 'hidden' in the grid, albeit as a simple visual theme. Instructions follow:

Trace the rover's path, that is a closed loop that does not cross itself, and moves horizontally or vertically through the cell borders. Some of the cells contain a charging station. The rover must visit at least one shaded outlined area between consecutive visits of every pair of charging stations along the path. Each outlined area must be passed through exactly once, and in its entirety. All charging points must be visited. The same is not necessarily true about all the cells in the grid.

This style is a crossover between two popular styles, Minesweeper and Battleships.

A special puzzle is coming up tomorrow.

Instructions follow:

Place the standard fleet of 10 ships into the given grid. Shups cannot touch each other, not even diagonally. Clues inside indicate the number of ship segments in adjacent cells, including diagonally adjacent cells.

Today. I am presenting a hybrid between two popular styles, minesweeper and cave. Instructions follow:

Place a mine into some of the empty cells so that each number represents the total count of mines in neighboring cells, including diagonally adjacent cells. Cells with numbers cannot contain mines. Additionally, all of the mines must form a single group of contiguous cells, the cave, each cell reachable from every other cell moving horizontally or vertically. All unshaded cells (cells that do not have a mine) must be connected to the edge of the grid through other unshade cells.

Hope you liked the Summon innovation presented yesterday.

Here is a variation on the Snake puzzle style. Instructions follow:

Place a 1-cell wide snake which does not touch itself, not even diagonally, such that no two white cells in the same row or column contain the same number. Also, no two consecutive cells used by the snake may contain the same number.

Rules: Place a number from 1 to N (integers only) into each cell so that each number appears exactly once in each row and column (the grid is of size NxN). Each number represents a skyscraper of that height. The numbers outside the grid indicate how many skyscrapers can be seen in the respective row or column from the respective direction; shorter skyscrapers are hidden behind taller ones.