What is a thermometer in Sudoku?

What is Thermo Sudoku? Thermo sudoku is a sudoku variant where ‘thermometers’ are overlaid on the grid. All the numbers placed in cells overlaid by a thermometer must increase in value from the circle bulb of the thermometer to the other end.

How do you solve a Sudoku thermometer?

Rules: Place a digit from 1 to 9 into each cell so that no digit repeats in any row, column or bold region. The digits in the thermometer shapes must be strictly increasing in each cell from the round bulb to the flat end (e.g., 12568).

How does sandwich Sudoku work?

In Sandwich Sudoku, the puzzle is presented with extra numbers outside the grid next to each row and column. These numbers indicate the SUM of cells sandwiched between the 1 and the 9 in that row/column. The logic required to solve the puzzles will appeal to anyone who enjoys normal sudoku and a bit of basic maths.

What is Arrow Sudoku?

Arrow Sudoku is a Sudoku variant where arrows originating from circled cells are overlaid on the grid. In addition to the standard Sudoku rules, in Arrow Sudoku the digits in the circled cells must be the sum of the digits along the arrow point out of it.

Can all Sudoku puzzles be solved without guessing?

All Sudoku puzzles are solvable only through logical deductions, with no guessing. Some hard Sudoku puzzles may require deductive techniques that you don’t know. Some very hard Sudoku puzzles may require techniques that are so complicated that no human can do them without taking extensive notes.

How do you do the Guardian sandwich in Sudoku?

The rules of Sandwich Sudoku are as follows:

1. Place the numbers 1-9 once in each row, column and 3×3 bold-lined box of the grid. This is the standard sudoku rule.
2. A number appears at the end of each row and column in the grid. This number tells you the sum of the digits placed between the 1 and 9 in that row or column.

Where can I find more thermo-Sudoku and arrow puzzles?

Follow this link for more Thermo-Sudoku puzzles. More Arrow and Thermo-Sudoku puzzles can be found in The Art of Sudoku 2. More Killer Sudoku puzzles can be found in Killer Sudoku by Serkan Yürekli. Author/Opus: This is the 30th puzzle from our contributing puzzlemaster JinHoo Ahn.

What is the history of thermo Sudoku?

(Brief) History of Thermo-Sudoku: Descended from Sudoku and relational puzzles. Thermo-Sudoku puzzles were created to provide a simplified and more visually interesting presentation of inequality concepts compared to other puzzles that primarily use greater than/less than symbols.

What are the rules for this Sudoku puzzle?

Author/Opus: This is the 2nd puzzle from guest contributor Michael Rios. Rules: Standard Sudoku rules. Also, some arrow shapes are in the grid; the sum of the digits along the path of each arrow must equal the digit in the circled cell (digits can repeat on an arrow).

Can a thermo Sudokus have multiple thermometers?

More complex thermo sudokus can have multiple thermometer ‘branches’ from the bulb and even multiple bulbs like in the example below from puzzlemaster John Bulten. In this example you will notice that the thermometer in the top left has two branches and the other three thermometers on the sides have two bulbs each.