Seven similar 7x7 (pen-and-paper) logic puzzles

Question

Oh no! I've just finished drafting some 7x7 logic puzzles, but I accidentally dropped all of them on the floor, and now they're all mixed up!

To make matters worse, I haven't gotten around to polishing their visuals yet, so they all look the same and I can't tell any of them apart! Some numbers are even written sloppily to the point of illegibility, marked by question marks.

Oh, kind puzzler who just conveniently happen to be passing by, would you help me identify which grid is which puzzle type, and solve them for me? I would be very grateful!

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I remember making seven puzzles, each one being one of these seven different types:

• Akari : Place light bulbs in some unshaded cells, such that every unshaded cells is lighted by a bulb, and no two lightbulb light each other. Lightbulbs shoot a ray of light in all four direction until it hits either the border of the grid, or a shaded cell. Treat all non-empty cells as shaded.

• Choco Banana : Shade some cells in the grid to form regions of shaded and unshaded cells, such that every shaded region is rectangular, and every unshaded region is NOT rectangular. Squares are rectangles too. If a region contains a number, the size of that region must equal that number. Regions may contain multiple copies of the same number, or no number at all.

• Fillomino : Divide the grid into regions, such that no two regions of the same size shares an edge. If a region contains a clue number, the size of the region must equal that number. Regions may contain multiple copies of the same number, or no number at all.

• Minesweeper : Place mines into some non-clue cells. Clue cells indicate the number of mines within the 8 neighbouring cells (orthogonally and diagonally adjacent).

• Nurikabe : Shade some non-clue cells to form unshaded regions, such that every region contains exactly one number, which equals to the size of that region, and the shaded cells form a big region. There may not be any 2x2 block of shaded cells.

• Shikaku : Divide the grid into rectangular regions, such that every region contains exactly one clue cell, which equals to the size of that region.

• Slitherlink : Draw a singular loop along the edge of the cells that does not branch off or cross itself. Clue cells indicate how many of its four borders is part of the loop.

Sorry if my explanation aren't the clearest, you can use the link provided to see an example puzzle.

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Thankfully it's not just 100% guess-and-check, there are some clues and observations you can use to identify the puzzles easier, and every individual puzzle is has a singular unique solution that is reachable without guessing.

If you need a starting point, here's a hint in case you need them:

Consider which genres has elements that are not allowed in other genres. For example, how many of the seven genres cannot have 0 as a valid clue cell?

Answer 1

The only puzzle grids that don't have 4s (which are not allowed in Slitherlink) are grids 1 and 6. 1 has too little clues, and we know every puzzle has a unique solution, so puzzle 6 must be a slitherlink.

Due to the number of 3s in the grid, the slitherlink can be easily solvable and the question marks filled in (they are all 0's and 2's):

Now,

Two grids have 0's. Puzzle 6 is the slitherlink grid, so the other, puzzle 1, must be either Akari or Minesweeper because only they can have zeros. If it is Minesweeper than there are multiple solutions, so it must be Akari. Now we assume the question marks should be shaded.

We can solve the Akari by noting the forced placements of bulbs in the corners.

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We can now make intutive deductions about which puzzle is which. Two adjacent clues are contradictory to Nurikabe's rules, so Nurikabe puzzles have to be puzzles 2, 3 or 5. Puzzle 5 at first looks like it might be solvable as a Nurikabe. However, the diagonally adjacent 2 and 4 as well as the 1s force the creation of a pool. Similarly the 3-1 combo in the bottom left corner of puzzle 2 forces a contradiction. Then puzzle 3 must be Nurikabe (thanks for the OP for bringing up the question marks!).

The corner 3-1 configuration in puzzle 2 and the corner 4s in puzzles 4 and 7 make them impossible for Minesweeper. Puzzle 4 is Minesweeper.

Shikaku is number 2 (number 7 has multiple solutions, and double-checking, this puzzle has only one).

Now we have either Choco Banana or Fillomino for puzzles 4 and 7.

Solving puzzle 7 as a Choco Banana gives us this:

Then,

We solve the last puzzle, puzzle 4, as a Fillomino (contradiction fixed by OP), getting

This was a great idea for a puzzle and definitely made me think!