All 120+ puzzles

Bridges

Join all the numbered circles, called islands, with bridges. Each island needs as many bridges as its number.

Tents

Pair each tree with a tent. Tents must not touch, even at a corner.

Light Up

Light every white cell. Lamps must never shine on each other.

Slitherlink

Draw one closed loop along the dots. Each number counts its sides on the loop.

Shikaku

Split the board into rectangles. Each rectangle holds 1 number showing how many boxes it needs.

Nurikabe

Mark the sea so each number gets an island with that many cells. Keep the sea joined. No 2 x 2 block may be all sea.

Hitori

Shade numbers until none repeats in any row or column. Shaded boxes never share a side. Keep all unshaded boxes joined along their sides.

Star Battle

Place 1 star in each row, column and outlined region; harder boards need 2. Stars cannot touch, even at corners.

Rules and a worked example

Magnets

Match the plus and minus counts in each row and column. Make each domino a magnet with plus and minus poles, or neutral with no signs. Matching poles cannot touch along a side.

Neighbourhood

Fill every plot with A, K or T. Each A needs exactly 1 K beside it. Each K needs at least 1 T beside it. Trees (T) cannot sit side by side.

Heyawake

Shade cells to match each room's number. Shaded cells can't share a side. Keep the white cells joined along their sides. A straight white line can't cross 2 room borders.

Kurodoko

Shade cells so each number sees exactly that many unshaded cells, including itself. Shaded cells never share a side. Keep all unshaded cells joined along their sides.

Spiral Galaxies

Split the grid into galaxies, with 1 dot in each. Each galaxy must look the same after a half turn around its dot.

Slant

Draw 1 diagonal line in each box. Each number counts the lines touching its corner. Keep the lines from closing a loop.

Binairo

Fill each box with 0 or 1. Avoid 3 matching numbers together, across or down. Each row and column needs as many 0s as 1s. Keep rows different and columns different.

Rules and a worked example

Triads

Pick 3 cards. Each detail must be all the same or all different.

Sequence Lab

Fill the gaps using the rules in the Rule library.

Matrix Relations

Compare the complete rows, then choose the missing panel.

Motif Weave

Fill the board with a repeating pattern. Pick its settings, then fill matching boxes with the same shape.

Symmetry Canvas

Fill the gaps so each bordered area matches its mirror or turn.

Growth Rules

Fill the missing blocks by replacing each letter once per generation.

Cellular Steps

Fill the gaps using the rule table.

Rule Gallery

Matches examples follow the rule. Does not match examples break it. Open Rules & legend to compare cards. Pick the group that fits every card that agrees with the labels.

Cycle Match

Tap Move 1 step to move every dot. Find the first step with every dot on its square. Tap Use this step to enter your answer. Take your time.

Mini Crossword

Fill the crossing words from their clues. Shared letters belong to both words.

Anagrams

Arrange every letter once to make a word that fits the clue.

Word Ladder

Change one letter at a time to reach the target word.

Word Search

Find every listed word in one straight line. Tap its first and last letters, or drag along the line.

Fill-In

Use every word copy once. Words share a letter where they cross.

Compound Join

Join each left half to a right half. Keep every letter and use each tile once.

Word Garden

Make different words with these letters. Include the marked center letter in every word. You can use letters again.

Letter Drop

Use the column letters to make words that match the clues.

Word Snake

Join touching letters to find words. Each word counts once.

Sentence Assembly

Put all the words in order to match the meaning. Copies of the same word work in either place.

Kakuro

Fill each run of white boxes with different numbers that add to its sum.

Calcudoku

Fill each row and column with 1 to the row length, without repeats. Match every cage clue.

Target Forge

Use every starting number once to make the target. Pick 2 cards, then a math button.

Magic Square

Use every number once to reach the target in each row, column and both corner-to-corner diagonals.

Cryptarithm

Give each letter a different digit to make the calculation true.

Operator Cross

Pick a maths sign for each letter. Use every bag sign once to make every rule true.

Sum Pyramid

Add the 2 numbers directly below each block to fill it.

Factor Web

Tap a box, type its number, then tap Enter. Numbers in linked boxes multiply to the number shown.

Ratio Lab

Fill the missing amounts using the clues. Ratios like 2:3 count parts of the same size. Use the shown tick size without rounding fractions.

Rounding Windows

Use the rounding reports to find the exact number for each letter. Pick a number on the shown tick marks. Halfway rounds away from 0.

Spot Difference

Match the labels in both pictures and mark each difference.

Embedded Figure

Find the whole target shape hiding among the lines.

Shape Census

Count every triangle with 3 complete straight sides once. Lines inside a triangle do not stop it counting.

Stencil Overlay

Pick the shown number of masks to match the target. Each mask is a grid of boxes; black stays black.

Topology Twins

Choose the card with the same connections as the target.

Polyomino Fit

Fill the outlined squares with the pieces. Pick a piece and turn it if needed. Keep pieces from covering the same square.

Sliding Tiles

Tap a tile next to the gap to slide it. Match the goal board.

Sliding Blocks

Clear the lane to the right, then slide X to the exit.

Sokoban

Use the right arrow to push the crate onto the ring.

Cube Net

Picture the 6 squares folding into a cube. Find opposite faces, match edges that meet, or pick the matching view.

Solid Rotation

Turn the 2 joined cubes a quarter turn. Then pick the matching shape.

Fold & Punch

Find and mark the holes when the paper is unfolded.

Voxel Views

Pick stack heights to match both views and all cube totals.

Edge Match

Use every tile once. Match touching numbers from 1 to 6 inside. Keep 0 edges outside.

Hinged Chain

Cover each outlined box once. Turn only at the numbered circles, called hinges. H and its arrow stay fixed.

Peg Solitaire

Tap a peg, then an empty hole just beyond 1 peg. Jump over that peg.

Sequence Recall

Look at the list, then enter it in the order asked for.

Snapshot Recall

Study the snapshot, then rebuild the one you are asked for. Pick Empty for empty boxes; unanswered boxes do not count.

Seen Before

Pick every card whose shape and pattern you saw together in the named group.

State Updates

Study the boxes, follow each step, then enter what they hold.

Intentions

Read the intentions, then pick Circle or Other for each event. Mark the actions you remember before tapping Next event.

Mini Sudoku

Fill each row, column and box without repeating a number.

Rules and a worked example

Nonogram

Fill the groups. Leave at least 1 empty cell between groups.

Logic Grid

Fill every box using the clues. Use each choice once per column.

Battleships

Find the hidden ships using the counts and ship list. Keep ships apart, even at corners.

Skyscrapers

Place each height once in every row and column. Edge clues count the buildings you can see from that side.

Futoshiki

Use each number once in every row and column, following the signs.

Truth Network

A says TRUE, so A is True. B says NOT A: set B to False.

Tapa

Build 1 black wall joined along box sides. Clue numbers give the sizes of separate black groups in the 8 boxes around them.

Fillomino

Fill each group with the number of boxes it has.

Static Minefield

Every number stays Safe. The 1 has only 1 neighbor without a number: row 1, column 1. Mark that cell Mine.

Attribute Sort

Tap a card, then pick the bin whose rule matches it.

Map Colours

Give connected cards different colours. Follow the connections to find each colour.

Dominosa

Pair the 2 zeros next to each other first. Use 01 and 11 once each for the boxes left.

Tube Sort

Move 1 top bead at a time. Keep a spare tube.

Open Pairs

Remove 2 free tiles with the same letter. You can see every letter, even on covered tiles.

Group Collapse

Tap an A tile to pick the A pair, then tap Collapse. Next, remove the B pair. No new tiles appear.

Palisade

Join boxes into areas of the shown size. Each number counts walls, including the board edge. Tap a box, pick Wall or Open, then tap a direction.

LITS

Make 1 L, I, T or S in each outlined region. Join all black boxes along their sides. Avoid black 2 by 2 squares. Matching shapes in different regions must not touch along a side.

Comparator Cascade

Place each number once, then tap Run to match the target.

Constraint Line

Read the clues, then pick a tile and a numbered position. Check the preview, then tap Place tile.

Stack Order

Use stacks to put the letters in the target order.

Queue Weave

Match the target by taking the first tile from a source.

Action Protocol

Cards use and make items in the bins. Play every card once to match the Goal numbers.

Signed Reversals

Pick one of the flip sizes shown. A flip reverses that many numbers from the top and swaps every + and -. Reach +1, +2, +3, and so on.

Laser Grid

Turn the mirrors to light up every target.

Numberlink Cover

Join matching letters. Cover every open box once, without sharing boxes or making loops.

Masyu

Draw one loop through every pearl. Turn at black pearls; go straight through white pearls.

Tracks

Join A to B with 1 track. Cells on the track are visited, including A and B. Match each row and column number by counting visited cells.

Network Rotate

Rotate each tile to match its neighbors. Connect all tiles without a loop.

Ice Collect

Slide until a wall or edge stops you. Collect every gem and stop on the goal.

Rolling Cube

Roll to the goal with the shown top face. Match the North face too, if shown. Any winning route counts.

Keys & Doors

Pick up keys on your way to the goal. Each door takes 1 matching key, then stays open.

One Stroke

Use every numbered line once, from S to T.

Twin Steps

Get A to goal A and B to goal B. Tap a direction to move both pieces. Walls and edges can hold 1 piece still.

Substitution Message

Read the hidden message. Pick letters using the given clues and full word lists.

Column Shuffle

Put the columns in order to read the message.

Periodic Key

Read A-F as 0-5. Subtract a known message number from its code number. Below 0, add 6. Pick that key for boxes with the same shape.

Coordinate Fractionation

Try each block size and check the given letters. Pick a box, then a letter from the square.

Rotor Message

Use the letter maps and fixed letters to find the message.

Code Clues

Read the clues already shown. Exact means the right symbol in the right position. Misplaced means the right symbol in a different position. Count each copy of a symbol once. Tap a code position, then tap a symbol.

Parity Repair

Fill every box so the 1s in each check pair up. Filling ? is free; changing starting numbers uses the shown limit.

Signal Segments

Split the 0s and 1s into codes. Use each letter the right number of times.

Segment Faults

Find and enter the digit in each display. The little bars that make each digit are called segments. A faulty segment stays off in every display. Tap a display, then compare its lit segments with the digit cards. Pick its digit; choosing faults is up to you.

Torque Balance

Place every weight so the total is 0. Each weight adds its number times its distance.

Knapsack

Pick whole items to reach the value target within the weight limit.

Bin Packing

Tap an item, then a bin, to place it whole. Each bin has the same weight limit. Pack every item into the target number of bins, the fewest you can use. Any groups that fit are allowed.

Assignment

Give each row a different task. Aim for the target, the lowest total cost.

Flow Cost

Balance every circle for the lowest cost.

Minimum Network

Connect every lettered point without loops at the target cost. An edge is a line between 2 lettered points. A loop returns to its start without using any edge again. Any answer that follows these rules counts.

Tour Budget

Start at A, visit every other station once, then return to A. Any route with the target cost counts.

Job Shop

Pick start times to finish all jobs as early as possible.

Measuring Jugs

Match every jug's target amount. Pick a jug to pour from and a jug to pour into. Tap Pour; it stops when the first jug is empty or the other is full.

Colour Flood

Spread your colour from the top left to cover the board. Stay within the move limit shown.

Connection Groups

Put every word in a named group, using only its listed meanings.

Bridge Word

Pick 1 word that fits every clue. You can read the free word guide any time.

Analogy Match

Match every role to a card, keeping each arrow and its direction. Any full plan that fits wins.

Rebus Scene

Read the word scene, then choose the whole phrase it shows.

Tool Reframe

Use the shown recipes to make 1 tool that meets every target.