Find your kind
of aha.

Aquarium

Set one water level in every aquarium.

Battleships

Find the hidden fleet.

Beam Route

Reflect one glowing beam through the board and into its receiver.

Blooms

(previously: Crowns)

One crown per row, column and colour.

Bridges

Every island belongs together.

Colour Code

Crack the hidden colour code.

Colour Fields

Two colours. One number in every field.

Colour Pour

Separate every colour into its own full tube.

Cross Sums

(previously: Kakuro)

A number crossword with sums.

Equation

Guess the hidden equation.

Five Letters

Guess the hidden five-letter word.

Float & Fall

(previously: Dosun-Fuwari)

Balance balloons and iron balls in gravity-filled rooms.

Four Colour

Colour an irregular map without matching neighbours.

Group Drop

Collapse matching groups and leave as little behind as possible.

Islands

(previously: Nurikabe)

Flood the board, leaving one island per number.

Lattice

Rearrange the letters into six crossing words.

Light Up

Light every open square with bulbs.

Lineloop

(previously: Slitherlink)

Draw one closed, unbranched loop around the clues.

Math Mosaic

(previously: Calcdoku)

Fill every row and column while solving the arithmetic cages.

Mini Sudoku

A smaller grid. The same satisfying logic.

More or Less

(previously: Futoshiki)

Fill the grid while obeying every inequality.

Nonograms

Find the picture, one deduction at a time.

Number Neighbours

(previously: Suguru)

Fill each block with one up to its size.

Number Runs

(previously: One Up)

Fill every wall-bounded run from 1 upwards.

Numberlink

Join every matching pair with separate paths that fill the board.

Pairs

(previously: Dominosa)

Pair the number grid into a complete domino set.

Patchwork

(previously: Fillomino)

Grow every number into a block exactly that big.

Pearl Loop

Draw one closed loop that obeys every pearl.

Pipes

Rotate the tiles into one pipe network.

Rectangles

(previously: Shikaku)

Divide the whole grid into rectangles whose areas match their clues.

Shade Out

(previously: Hitori)

Shade out the duplicates until every line reads clean.

Slant

Two directions. Plenty to think about.

Sun & Moon

Fill the grid with suns and moons.

Sweep

Flag every mine, and never guess.

Tents

Place one tent beside every tree and keep all tents apart.

Traffic

Make room for the next move.

Trail

Draw one path through every cell.

Triangle Tiles

(previously: Shakashaka)

Place triangles so every white area is a rectangle.

Untangle

Pull the knots apart until no connecting lines cross.

Word Weave

(previously: Wend)

Trace the hidden words through every open tile.