• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Killer Cage: digits must sum to the value in the top left corner.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• German Whisper (green): adjacent digits must have a difference of at least 5.
• Renban (purple): digits on the line are a set of non-repeating, consecutive numbers, in any order.
• Rellik Cage: any combination of one or more digits cannot sum to the value in the top left.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Quadruple: digits within the circle must appear at least once in the surrounding cells.
• Loop: draw a loop that goes through all 3x3 boxes, does not go through a quadruple circle cell, has vertical symmetry, and shares the same entropy as those in the same 3x3 box.
• Entropy: low digits (1, 2, 3), medium digits (4, 5, 6), high digits (7, 8, 9).

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• *Thermometer (grey): digits along a thermoeter strictly increase from bulb to tip.

*The sum of every thermometer is 15.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Little Killer: digits outside the grid give the sum of the digits along the indicated diagonal.
• Circle (grey): digit must be odd.
• *X: cells connected with an X must sum to 10.

*all possible Xs are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Little Killer: digits outside the grid give the sum of the digits along the indicated diagonal.
• Dutch Whisper (yellow): digits are at least 4 apart from their neighbors on the line.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.

*not all possible dots are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Little Killer: digits outside the grid give the sum of the digits along the indicated diagonal.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• 1-5-9: each digit in column 1 indexs the 1 in its row, each digit in column 5 indexs the 5 in its row, and each digit in column 9 indexs the 9 in its row.
• Killer Cage: digits must sum to the value in the top left corner.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.
• Fog: when a digit is correctly placed, both its own cell and its surrounding 8 cells will be cleared of fog.

*all possible dots are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Entropic Line (tan): every string of three adjacent digits must contain one digit from each set: 123, 456, 789.
• Modular Line (teal): every string of three adjacent digits must contain one digit from each set: 147, 258, 369.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.
• *Kropki Dot (white): a white dot between cells indicates cells with consecutive values.
• *X: cells connected with an X must sum to 10.
• *V: cells connected with a V must sum to 5.

*not all possible dots/Xs/Vs are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Killer Cage: digits must sum to the value in the top left corner.
• Thermometer (grey): digits along a thermoeter stritly increase from bulb to tip.
• Circle (grey): digit must be odd.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Killer Cage: digits must sum to the value in the top left corner.
• Thermometer (grey): digits along a thermoeter stritly increase from bulb to tip.
• Circle (grey): digit must be odd.
• *V: cells connected with a V must sum to 5.
• Non-Consecutive: cells that are orthogonally adjacent cannot contain consecutive digits.

*all possible Vs are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Entropic Line (orange): every string of three adjacent digits must contain one digit from each set: 123, 456, 789.
• Modular Line (teal): every string of three adjacent digits must contain one digit from each set: 147, 258, 369.
• *Kropki Dot (white): a white dot between cells indicates cells with consecutive values.

*not all possible dots are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Circuit Line (gold and silver): digits at the endpoints of each gold or silver line are the same as each other and indicate exactly how many unique digits are on that line.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Orthogonally connected cells within each region must differ by at least 3.
• Orthogonally connected cells between regions must differ by at least 4.
• The central digit in each region is less than or equal to its region number.

• Hashiwokakero: connect all of the islands by drawing a series of bridges between the islands. The bridges must:
• begin and end at distinct islands, travelling a straight line in between.
• not cross any other bridges or islands.
• only run orthogonally (i.e. they may not run diagonally).
• at most two bridges connect a pair of islands.
• the number of bridges connected to each island must match the number on that island.
• the bridges must connect the islands into a single connected group.

• Hashiwokakero: connect all of the islands by drawing a series of bridges between the islands. The bridges must:
• begin and end at distinct islands, travelling a straight line in between.
• not cross any other bridges or islands.
• only run orthogonally (i.e. they may not run diagonally).
• at most two bridges connect a pair of islands.
• the number of bridges connected to each island must match the number on that island.
• the bridges must connect the islands into a single connected group.

• Hashiwokakero: connect all of the islands by drawing a series of bridges between the islands. The bridges must:
• begin and end at distinct islands, travelling a straight line in between.
• not cross any other bridges or islands.
• only run orthogonally (i.e. they may not run diagonally).
• at most two bridges connect a pair of islands.
• the number of bridges connected to each island must match the number on that island.
• the bridges must connect the islands into a single connected group.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.
• *Kropki Dot (white): a white dot between cells indicates cells with consecutive values.

*all possible dots are given, black and white dots do not overlap.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Summing Lines: each coloured line represents a value. Each colour has a different value. A cell's digit equals the sum of all lines within that cell.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.
• *Kropki Dot (white): a white dot between cells indicates cells with consecutive values.

*not all possible dots are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Killer Cage: digits must sum to the value in the top left corner.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.
• *Kropki Dot (white): a white dot between cells indicates cells with consecutive values.
• *X: cells connected with an X must sum to 10.
• *V: cells connected with a V must sum to 5.

*not all possible dots/Xs/Vs are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Thermometer (grey): digits along a thermoeter strictly increase from bulb to tip. Each pair of orthogonally adjacent digits includes exactly one odd and one even digit.
• Orthogonally adjacent digits are non-consecutive.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Slow thermometer (grey): digits along a thermoeter increase from bulb to tip. Digits may repeat.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Killer Cage: digits must sum to the value in the top left corner.
• Any digit inside a cage cannot see the same digit that is a king's or knight's move apart.
• Any digit outside a cage must see the same digit that is a king's and/or knight's move apart atleast once.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Disjoint: digits in the same relative position in different boxes cannot contain the same digit.
• Killer Cage: digits must sum to the value in the top left corner.
• Fog: when a digit is correctly placed, both its own cell and its surrounding 8 cells will be cleared of fog.
• Thermometer (grey): digits along a thermoeter stritly increase from bulb to tip.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Entropy: blue cells are low (1, 2, 3), green cells are middle (4, 5, 6), orange cells are high (7, 8, 9).
• Circle (grey): digit must be odd.
• *X: cells connected with an X must sum to 10.
• Anti-knight: any digit separated by a knight's move cannot be the same.
• The positive and the negative diagonals must sum to either 33 or 42.
• There is exactly one X-sum clue in the grid that is 41. Eg. There is a 41 clue positioned outside a row or column somewhere, and it gives the sum of the first X digits in that row or column, where X is the first digit in that row or column.

*all possible Xs are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• German Whisper (green): adjacent digits must have a difference of at least 5.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.

*not all possible dots are given.

• Squishdoku: place the digits 1-9 once each in every row, column, and 3x3 box (indicated by the dashed lines; 11 total boxes).
• German Whisper (green): adjacent digits must have a difference of at least 5.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.
• *Kropki Dot (white): a white dot between cells indicates cells with consecutive values.

*all possible dots are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Cell Corner (purple): digits in circles tell you how many odd digits are in its surrounding cells (excluding itself). Each circle contains a different digit.
• Odd Little Killer: digits outside the grid give the sum of the odd digits along the indicated diagonal.
• Odd Dutch Whisper (grey): adjacent digits must be odd and have a difference of at least 5.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.
• *Kropki Dot (white): a white dot between cells indicates cells with consecutive values.

*not all possible dots are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Anti-knight: any digit separated by a knight's move cannot be the same.
• Killer Cage: digits must sum to the value in the top left corner.
• Palindrome Line (grey): digits must read the same forwards and backwards.
• *Kropki Dot (black): a black dot between cells indicates cell values with a 2:1 ratio.
• *X: cells connected with an X must sum to 10.
• *V: cells connected with a V must sum to 5.

*not all possible dots/Xs/Vs are given.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• German Whisper (green): adjacent digits must have a difference of at least 5.
• Killer Cage: digits must sum to the value in the top left corner.
• Palindrome Line (grey): digits must read the same forwards and backwards.
• Thermometer (grey): digits along a thermoeter stritly increase from bulb to tip.
• *Kropki Dot (white): a white dot between cells indicates cells with consecutive values.
• *X: cells connected with an X must sum to 10.
• *V: cells connected with a V must sum to 5.

*not all possible dots/Xs/Vs are given.