What is a jellyfish in Sudoku?

A Jellyfish occurs when in four rows all possible cells for a given digit lie in four columns. This digit can be eliminated from the remaining cells of these columns. The technique also works when we replace rows with columns.

What is the jellyfish method Sudoku?

If a particular candidate is present in four or less Cells in four Rows and if these Cells belong to the same four Columns, then whichever Cells the candidate is the solution for in any of these four Rows, these Cells must be in different columns.

What is a Swordfish in Sudoku?

A Swordfish is a 3 by 3 nine-cell pattern where a candidate is found on three different rows (or three columns) and they line up in the opposite direction.

What is a finned jellyfish in Sudoku?

A Finned Jellyfish is a pattern that is one cell short of being a Jellyfish - in other words, four columns that contain a candidate in only four rows, except for one, and vice versa.

What is a bug in Sudoku?

A Bivalue Universal Grave or BUG is a state of the grid in which every unsolved cell has 2 candidates, without the presence of Hidden Singles. This is one of the Deadly Patterns that do not occur in a valid Sudoku. For some people, it is also a solving technique.

The Jellyfish Sudoku Pattern & App News

What is the secret to solving Sudoku puzzles?

The most basic strategy to solve a Sudoku puzzle is to first write down, in each empty cell, all possible entries that will not contradict the One Rule with respect to the given cells. If a cell ends up having only one possible entry, it is a "forced" entry that you should fill in.

What is a chute in Sudoku?

Three boxes in a row are called a chute (a horizontal chute is a floor, a vertical chute is a tower) or a band. Cells are filled with values, the values present at the beginning of the game are called givens, possible values for unfilled cells are candidates. The whole sudoku area is sometimes called grid.

What is sashimi in Sudoku?

The Sashimi pattern is very similar to the traditional Sudoku X-Wing configuration. In this case, the player also finds one digit with only two possible solutions within two rows/columns. Yet, one of the cells is not connected to another by row or column.

What are wings in Sudoku?

X-Wings are when there are two lines, each having the same two positions for a number. Take a look at this puzzle: Once you've satisfied yourself that there aren't any easy methods you can apply to move forward, take a look at the candidate positions for 6, in rows 4 and 9.

What is turbot fish in Sudoku?

A Turbot Fish is a single-digit solving technique that uses a loop of odd length. The minimum length is 5, forming a fish-shaped pattern that gave the technique its name. Longer loops are possible, but they are better known as Fishy Cycles.

What is Bowman's Bingo in Sudoku?

Bowman Bingo is a very advanced solving technique that analyzes the implications for a move in order to find a contradiction. It is named after Doug Bowman, who suggested this coloring approach, but was fully developed by Robert Woodhead, the author of the Sudoku Susser program.

Is Sudoku good for your brain?

Sudoku keeps your brain active and reduces the risk of Alzheimer's, a most common cause of dementia that affects a person's thinking and behavioural skills. Stimulates your mind: The game works on your logical thinking process as you are absorbed in solving a puzzle and eventually improve your number skills.

What are the 3 rules of Sudoku?

What is the easiest Sudoku method?

The easiest way starting a Sudoku puzzle is to scan rows and columns within each triple-box area, eliminating numbers or squares and finding situations where only a single number can fit into a single square. The scanning technique is fast and usually sufficient to solve easy puzzles all the way to the end.

What is the best algorithm to solve Sudoku?

The simplex algorithm is able to solve proper Sudokus, indicating if the Sudoku is not valid (no solution). If there is more than one solution (non-proper Sudokus) the simplex algorithm will generally yield a solution with fractional amounts of more than one digit in some squares.

What is hidden four in Sudoku?

A Hidden Quad is a Hidden Subset of size 4. When all candidates for 4 digits in a house are limited to only 4 cells, these cells must contain these 4 digits. Subsequently, all remaining candidates can be removed from these 4 cells.

What is a hidden triple in Sudoku?

"Hidden triples" applies when three cells in a row, column, or 3x3 block contain the same three Notes. These three cells also contain other candidates, which may be removed from them. It will be easier to understand this technique if you look at the example. Take a look at the highlighted cells.

What is the dead end in Sudoku?

There is no solution. Out in the Sudoku verse, the other name for it is the bivalue universal grave or graveyard. And basically what that means bivalue means two possibilities in each space. And then universal that it's every space on the board, and then graveyard means that it's basically a dead end.

What is the hardest Sudoku game?

Expert Sudoku is a game for experienced Sudoku players with a very high level of difficulty. This hardest Sudoku puzzle is characterized by the fact that only a few numbers are shown in the Sudoku square, which consists of 9 small squares, where the cells are located 3x3.

What is the rule for sandwich Sudoku?

Every row, column and 2x3 box must contain the digits from 1 to 6. The clues on the outside of the grid show the sums of the numbers sandwiched between the 1 and the 6 in that row or column.

What is cross hatching in Sudoku?

Sudoku cross-hatching, or solving sections, is where you look at a single box with respect to two other boxes. You search for a specific number and see if that number will fit anywhere within the section you are looking at.

Can there be 2 solutions to a Sudoku puzzle?

A well-formed Sudoku puzzle is one that has a unique solution. A Sudoku puzzle can have more than one solution, but in this case the kind of logical reasoning we described while discussing solving strategies may fall short.

Are you smart if you can solve Sudoku?

From this case study it can be concluded that an individual who is skilled at solving Sudoku puzzles likely has a high general IQ. The results of the weak correlation between Sudoku scores and the WAIT test indicates that in some cases a high Sudoku doesn't necessarily mean a high general IQ.

Can you always solve Sudoku without guessing?

Can all Sudoku puzzles be solved without guessing? According to Sudoku Of The Day, “Sudoku is a puzzle involving logic—no arithmetic or guessing is required!” While you can, guess, of course, if your guess is wrong, it will throw off the rest of the puzzle and you'll need to start over.