• 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 stritly 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.