The trick to spotting X-Wings is to look for the rectangles of possible candidates. If you find four candidates on the corners of a rectangle, check to see if they are an X-Wing for both rowsandcolumns – that might save you some extra time! Some more examples X-Wing in rows for 8...
X-Wing技巧是另一种高级的数独解题策略,用于解决某个数字在不同行和不同列的可能位置只有两个时的情况。通过应用X-Wing技巧,可以进一步减少未知数字的可能性,加快解题进程。 1.发现X-Wing模式: -找出某个数字在每行的可能位置; -如果某数字在两行上只出现在两列上; -在另外两行上同样的列上也只有该数字; ...
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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 ...
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...
The purpose of this essay is to implement and study different techniques for solving Sudoku puzzles, a problem similar to graph coloring with fixed size and dependencies. Three approaches are presented and compared regarding efficiency (time needed, space required and success rate). These approaches ...
Sudoku X-wing look for 4 cells with the possible same digit that create the shape of an X. See image below: Go to the x-wing tutorial Sudoku swordfish The same principle of the x-wing method only this time isolate 3 columns with the same possible digit. See image below: Go to the ...
Sudoku X-wing look for 4 cells with the possible same digit that create the shape of an X. See image below: Go to the x-wing tutorial Sudoku swordfish The same principle of the x-wing method only this time isolate 3 columns with the same possible digit. See image below: Go to the ...
An XY-Wing is a solving technique that uses a short chain of 3 cells. The cell in the center is called the pivot. The other 2 cells are the pincers. The chain uses only 3 digits, symbolically named X, Y and Z. Any 3 digits can replace these letters. The pivot contains ...
• X-Wing • XY-Wing • XYZ-Wing • W-Wing • Skyscraper • 2-String Kite • Swordfish • Jellyfish • Empty Rectangle • Unique Rectangle Type 1 and 2 Input checking After copying a printed puzzle, Smart Sudoku will tell you whether the puzzle has a unique solution or...