Easy sudoku printable color3/17/2024 Step 4) Once marked A-B all possible cells in the puzzle position: 4.1) If one cell has two or more peers colored with both colors (A AND B), you can safely exclude this cell as a candidate for the focused digit. Step 3) Until no more new cells can be found to be colored, do: 3.1) If all but one and only one cell (called the Exception Cell) of all the candidates in a house are peers of cells colored with the same color (let's say color A), then this Exception cell can be colored with the SAME COLOR (A). That is, if the colored conjugated cell is Color A, then the new cell will be Color B, and vice versa. 2.2) Color this new cell with the OPPOSITE color of its already colored pair-conjugated cell. Step 2) Until no more new cells can be found to be colored, do: 2.1) Find a not colored cell that is pair-conjugated of one cell already colored (with any color A or B). Step 1) Select one pair of conjugate cells, color one of them with color A and the other with color B. Algorithmįocus on one single candidate in the grid, as X-Colors is a single-digit technique. See the examples below to better understand the technique. However, X-Colors do not replace the multiple-digit Ultracoloring technique. X-Colors do the same job than both Simple Colors and Multi-Colors with only two colors and a few simple steps, defined in an algorithmic way, and can solve situations that none of both can. This places the technique in a dangerous territory, since many solvers like to avoid Nishio. Occasionally, X-Colors can go as far as Nishio, the ultimate single-digit solving technique. Both Weak Colors and X-Colors are based on a simple set of instructions, which must be executed repeatedly. X-Colors can be seen as an extension of the Weak Colors technique. This technique can be used on an initial color cluster of any size, although a larger cluster increases the chances of successfully finding candidates to remove. It is a relatively simple method that can be learned quickly and is capable of achieving the same results as more advanced techniques, such as Multi-Colors and single-digit chains. X-Colors, or eXtended Colors, is a coloring technique that uses only 2 colors, even when weak links are bridged.
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