This is a Monday stostone puzzle.

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# Puzzle 143 – Stostone

# Stostone Rules

# Puzzle 142 – Corral [In/Out]

# Puzzle 141 – Nurikabe [In/Out]

# Puzzle 140 – Corral [In/Out]

# Puzzle 139 – Tapa [In/Out]

# Puzzle 138 – Loop [In/Out]

# Puzzle 137 – Matchstick Puzzle

# Puzzle 136 – A puzzle from Turkey

Stostone is a new puzzle type by Nikoli. Shade exactly one stone, a connected group of cells, in each region, such that no two stones in different regions are adjacent. If a number is in a region, it tells the size of that region’s stone. If you let the stones all fall down, they must cover exactly the bottom half of the grid.

See the example below, where the 1st grid is the puzzle, the 2nd grid is the solution, and the 3rd grid is what it looks like if all the stones fall down.

This is a Friday corral puzzle, with the exception that cells with numbers are allowed to be inside or outside the loop. Note that cells outside the loop only see cells outside the loop, until blocked by the loop or the edge of the grid.

In case you didn’t like Wednesday’s In/Out which only contained the digit 2, I made this one so that 2’s the only digit that doesn’t* *appear!

This is a Thursday nurikabe puzzle, with the exception that cells with numbers are allowed to shaded or unshaded. Note that a shaded number states the size of the island it would be in if you were to unshade that cell. The question marks can represent any (positive) integer.

This is a Wednesday corral puzzle, with the exception that cells with numbers are allowed to be inside or outside the loop. Note that for cells outside the loop only see cells outside the loop, until blocked by the loop or the edge of the grid.

This is a Tuesday tapa puzzle, with the exception that cells with numbers are allowed to be shaded or unshaded. Note that a cell with a number will never count itself, only the eight cells around it.

This is a Monday loop puzzle, with the exception that cells with numbers are allowed to be shaded or unshaded. Note that a cell with a number will never count itself, only the eight cells around it.

An interesting variation that can apply to a whole bunch of types of puzzles. It might be harder than a normal Monday, but it’s the easiest puzzle this week, I think.

I turned 19 today!

There are 19 matchsticks arranged in the shape of the number 19 below. You can ignore the colors, which is to show the 19. You can also ignore the fact that they are matchsticks, which is to say, you may not break them, burn them, use their thickness to solve the puzzles, and should just treat them as movable line segments.

At the start, there is only 1 rectangle, and it has area 4. There are 2 puzzles, the 1st is somewhat easier. Reset the matches back to the original position before starting the 2nd. (Don’t move 5 from the position which solved the 1st puzzle.)

1.) Move 3 matchsticks so that the sum of the areas of all rectangles formed is exactly 19.

2.) Move 5 matchsticks, so that there are exactly 19 rectangles.

Both puzzles are probably unique (besides some trivial differences in the second), but it’s hard for me to guarantee that.

This is the third of three internationally themed puzzles. See Wednesday’s puzzle for introduction.

This is most likely the easiest of the three, but requires more trivia/internet than the other two. Again hopefully the picture quality and handwriting is legible.

I’ll post a puzzle tomorrow for my nineteenth birthday, which is in under two hours from now! 😀