What is new about this technique is that knowledge about two (similar) rows, lets you make removals from columns. Of course, it works the other way too, if you can spot similar columns. You’ll often spot X-Wings – they are quite common, but they won’talwayslead to you being able...
6. X-Wing This method can work when you look at cells comprising a rectangle, such as the cells marked in red. In this example, let’s say that the red and blue cells all have the number 5 as candidate numbers. Now, imagine if the red cells are the only cells in columns 2 and ...
An X-Wing is a advanced technique which can eliminate certain candidates from squares. Its name comes from the pattern formed by the digits. We are looking for two rows (or columns) that contain exactly two of a particular digit. Using 'show squares with a pencil mark' and selecting <4>...
An XY-Wing is a very advanced technique which can eliminate certain candidates from squares. Its name comes from the pattern formed by the digits and is not related to X-Wing. We are looking for three squares, each of which contains exactly two digits. The first square contains XY and we...
XY-Wing strategy is an advanced technique for eliminating candidates. Let’s review it with an example. Let’s say, there are 3 different cells with exactly 2 candidates (notes) each that are related to each other. The cell in the center is called the pivot. The two others are called ...
6. The X-Wing Technique This method essentially uses the fact that in specific cases, there are only two possible ways to place two numbers in four squares to form a rectangle. Basically, there is a connection between the diagonally opposite squares, thus the “x” in x-wing. The word ...
Swordfish is a more complicated version of X-Wing. In most cases, the technique might seem like much work for very little pay, but some puzzles can only be solved with it. So if you want to be a sudoku-solving master, read on!
Fish (X-Wing)/Swordfish/Jellyfish In this technique you need to find an option for 2 columns that only valid on intersection with 2 rows and nowhere else on those 2 columns, but valid somewhere else on those 2 rows (see example). In this case the option can be removed from any other...
X-Wing是一个高级技巧,在一些比较复杂的题目里可以非常有效的去除候选数。 如果一个数字正好出现且只出现在某两行的相同的两列上,则这个数字就可以从这两列上其他的单元格的候选数中删除。 当然,同样的情形也会出现在列中,也就是说,如果一个数字正好出现且只出现在某两列的相同的两行上,则这个数字就可以从...
If none are found, the next technique is added to the mix and the possible candidate numbers are recomputed. Again, if any are found that have only one possible candidate number, the first of those found is returned. This continues until a suggested cell has been found or until all ...