• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Arrow: digits along an arrow line must sum to the value in the circle/pill. Multi-digit circles/pills are read left to right, up to down.
• *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 dots are given.

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

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• German Whisper Line (green): adjacent digits along the line must differ by at least 5.
• Renban Line (purple): digits along the line contain consecutive digits in any order.
• Thermometer: digits along a thermometer strictly increase from bulb to tip.

• Sudoku: place the digits 1-9 once each in every row, column, and 3x3 box.
• Arrow: digits along an arrow line must sum to the value in the circle/pill. Multi-digit circles/pills are read left to right, up to down.
• Thermometer: digits along a thermometer strictly increase from bulb to tip.

• Surowku: place the digits 1-9 once in every row 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.

*not all dots are given.