RED SUS

Fillomino

Rules

• Divide the grid into regions.
• If two regions are adjacent, they do not have the same size.
• A given number in a region indicates the size of the region.
• A region may contain any number of givens, including zero.

Hashiwokakero

Rules

Draw bridges between islands (numbers in circles) such that:

• Bridges start and end on distinct islands.
• Bridges are either horizontal or vertical.
• Bridges may not cross other bridges or islands.
• If there exist bridges between 2 islands, there are either one or two bridges between them.
• The number on the island indicate the number of bridges connected to it.
• All islands are connected via bridges (i.e. you can travel from any island to any other island via bridges).

Heteromino

Rules

• Divide the white cells along the dotted lines into regions of size 3.
• Regions of the same shape and the same orientation are not orthogonally adjacent.

Icebarn

Rules

• Draw a directed path from IN to OUT via axis parallel lines connecting centers of cells (and the IN/OUT arrow).
• The directed path must pass through the arrows in the indicated direction.
• The directed path must pass through every icebarn at least once (An icebarn is a connected region of ice cells).
• The directed path may not turn on ice cells.
• The directed path may cross only on ice cells.
• When the path is crossing, the path must go straight.

LITS

Rules

• Shade 4 cells within each region to form a tetromino (4 connected cells).
• Same tetrominos may not be adjacent (2 tetrominos are the same if you can reflect and/or rotate one to form the other).
• All shaded cells must form a connected region.
• There may not be any 2x2 region of shaded cells.

Masyu

Rules

• Draw a single non-intersecting loop connecting centers of cells via axis-parallel lines.
• The loop may only turn at center of cells.
• The loop must pass through the center of every circle.
• The loop must go straight through every white circle and make at least one turn before going a distance of 2 either before or after the white circle (or both).
• The loop must turn in every black circle and go straight for at least a distance of 2 before and after the black circle.
• The loop may enter and exit each cell at most once.

Moon or Sun

Rules

• Draw a single non-intersecting loop connecting centers of cells via axis-parallel lines.
• A region of bolded lines is called a "room". The loop goes through each room exactly once.
• Whenever the loop visits a room, it must pass through either all of the suns and none of the moons or all of the moons and none of the suns in that room before leaving the room.
• The loop must visit every room at least once.
• The loop alternates between "visit all suns" and "visit all moons" whenever it enters a room.

Nurikabe

Rules

Shade some cells such that:

• Number cells remain unshaded.
• A number indicates the amount of connected unshaded cells in the unshaded region the number is in.
• Each unshaded region contains exactly one number.
• All shaded cells are connected.
• There may not be a 2x2 region of shaded cells.

Star Battle

Rules

Place some stars such that:

• Each row and column contains exactly 2 stars.
• Each outlined region contains exactly 2 stars.
• Stars may not touch (2 stars are touching if the 2 cells containing them share at least a point).

Sudoku

Rules

Place numbers such that:

• Every row and column contains each number 1-9 exactly once.
• Every outlined 3x3 box contains each number 1-9 exactly once.