In row X, we have 2, 1, 3, and 9. In column Y, we have 1, 7, 5, 2 and 4. In Z square, we have 1, 2, 3, and 4. There are no: 6, and 8. In row X, we have 5, and 3. In column Y, we have 2, 4, 8 and 1. In Z square, we have 9, 2, 8, and 5. There are no: 6, and 7 In row X, we have 6, 4, and 2. In column Y, we have 5, 2 and 4. In Z square, we have 3, 4, 8, and 2. There are no: 1, 7, and 9 In row X, we have 7, 6, 2, and 1. In column Y, we have 5, 4, 8, 6 and 2. In Z square, we have 7, 9, 6, and 5. Missing: 3 In row X, we have 2, 1, 3, and 9. In column Y, we have 1, 7, 5, 2 and 4. In Z square, we have 1, 2, 3, and 4. There are no: 6 and 8. In row X, we have 9, 5, 7, and 1. In column Y, we have 8, 9, 1, and 2 In Z square, we have 1, 4, 7, 8, and 9. There are no:

In row X, we have 3, 7, 5, and 1. In column Y, we have 6, 2, 9, and 5. In Z square, we have 8, 1, and 7 There are no:

No, we have 6 in column Y

No, just "There are no: 4"

In row X, we have 2, 5, 7, and 1. In column Y, we have 4, 1, and 2 In Z square, we have 1, 4, 7, 8, and 9. There are no:

Find all cells that have only one candidate in this Sudoku puzzle in one shot like a champ without any mistakes and list all of them Then check your findings step by step carefully, analyzing every proposed cell by writing existing numbers in the same row, column and square of a proposed cell. don't write your candidate number first, make a guess with a cell, check existing numbers and only then write a complete list of candidates, and only then check if there are more than one If they really are cells with one candidates, fill them by writing new state of the puzzle (optional) Point to the mistakes if there are any 2 1 _ | _ _ _ | 4 8 7 8 _ _ | 3 _ 2 | _ 9 1 9 _ 5 | _ 7 1 | _ _ _ -------+-------+------ _ _ 7 | 5 9 _ | 6 1 _ 5 6 _ | _ _ 3 | _ _ 2 4 _ 1 | 6 _ _ | 7 _ _ -------+-------+------ _ 3 9 | _ _ 7 | _ _ _ 7 _ _ | 1 _ _ | _ 2 6 1 _ _ | _ 6 5 | _ _ 9 Here are breakdown of squares: upper-left square contains cells: c(A,A) c(A,B) c(A,C) c(B,A) c(B,B) c(B,C) c(C,A) c(C,B) c(C,C) upper-center square contains cells: c(A,D) c(A,E) c(A,F) c(B,D) c(B,E) c(B,F) c(C,D) c(C,E) c(C,F) upper-right square contains cells: c(A,G) c(A,H) c(A,I) c(B,G) c(B,H) c(B,I) c(C,G) c(C,H) c(C,I) middle-left square contains cells: c(D,A) c(D,B) c(D,C) c(E,A) c(E,B) c(E,C) c(F,A) c(F,B) c(F,C) middle-center square contains cells: c(D,D) c(D,E) c(D,F) c(E,D) c(E,E) c(E,F) c(F,D) c(F,E) c(F,F) middle-right square contains cells: c(D,G) c(D,H) c(D,I) c(E,G) c(E,H) c(E,I) c(F,G) c(F,H) c(F,I) bottom-left square contains cells: c(G,A) c(G,B) c(G,C) c(H,A) c(H,B) c(H,C) c(I,A) c(I,B) c(I,C) bottom-center square contains cells: c(G,D) c(G,E) c(G,F) c(H,D) c(H,E) c(H,F) c(I,D) c(I,E) c(I,F) bottom-right square contains cells: c(G,G) c(G,H) c(G,I) c(H,G) c(H,H) c(H,I) c(I,G) c(I,H) c(I,I) Here are analysis by sectors: Rows: In row A, we have 2, 1, 4, 8, and 7. In row B, we have 8, 3, 2, 9, and 1. In row C, we have 9, 5, 7, and 1. In row D, we have 7, 5, 9, 6, and 1. In row E, we have 5, 6, 3, and 2. In row F, we have 4, 1, 6, and 7. In row G, we have 3, 9, and 7. In row H, we have 7, 1, 2, and 6. In row I, we have 1, 6, 5, and 9. Columns: In column A, we have 2, 8, 9, 5, 4, 7, and 1. In column B, we have 1, 6, and 3. In column C, we have 5, 7, 1, and 9. In column D, we have 3, 5, 6, and 1. In column E, we have 7, 9, and 6. In column F, we have 2, 1, 3, 7, and 5. In column G, we have 4, 6, and 7. In column H, we have 8, 9, 1, and 2. In column I, we have 7, 1, 2, 6, and 9. Squares: Upper-left square (A1 to C3): 2 1 _ 8 _ _ 9 _ 5 Numbers present: 1, 2, 5, 8, 9 Upper-center square (A4 to C6): _ _ _ 3 _ 2 _ 7 1 Numbers present: 1, 2, 3, 7 Upper-right square (A7 to C9): 4 8 7 _ 9 1 _ _ _ Numbers present: 1, 4, 7, 8, 9 Middle-left square (D1 to F3): _ _ 7 5 6 _ 4 _ 1 Numbers present: 1, 4, 5, 6, 7 Middle-center square (D4 to F6): 5 9 _ _ _ 3 6 _ _ Numbers present: 3, 5, 6, 9 Middle-right square (D7 to F9): 6 1 _ _ _ 2 7 _ _ Numbers present: 1, 2, 6, 7 Bottom-left square (G1 to I3): _ 3 9 7 _ _ 1 _ _ Numbers present: 1, 3, 7, 9 Bottom-center square (G4 to I6): _ _ 7 1 _ _ _ 6 5 Numbers present: 1, 5, 6, 7 Bottom-right square (G7 to I9): _ _ _ _ 2 6 _ _ 9 Numbers present: 2, 6, 9 Example of YOUR work: –example-- I think Cell (F,E) and Cell (D, A) are good candidates, lets analyze them: Cell (F, E): In row F, we have 4, 1, 6, and 7. In column E, we have 9, 7, and 6. In the middle-center square, we have 5, 9, 3, and 6. There are no: 2 and 8. So, we can't fill this cell yet. Cell (D, A): In row D, we have 7, 5, 9, 6, and 1. In column A, we have 2, 8, 9, 5, 4, 7, and 1. In the middle-left square, we have 7, 5, 6, 4, and 1. There are no: 3. Updated puzzle state: 2 1 _ | _ _ _ | 4 8 7 8 _ _ | 3 _ 2 | _ 9 1 9 _ 5 | _ 7 1 | _ _ _ ------+------+------ 3 _ 7 | 5 9 _ | 6 1 _ 5 6 _ | _ _ 3 | _ _ 2 4 _ 1 | 6 _ _ | 7 _ _ ------+------+------ _ 3 9 | _ _ 7 | _ _ _ 7 _ _ | 1 _ _ | _ 2 6 1 _ _ | _ 6 5 | _ _ 9 Updated sectors states: In row D, we have 7, 5, 9, 6, 3, and 1. In column A, we have 2, 3, 8, 9, 5, 4, 7, and 1. In the middle-left square, we have 7, 5, 6, 4, 3, and 1. --example end-- DO THIS UPDATES FOR ROWS, COLUMNS AND SQUARES AFTER EVERY STEP I repeat, do not write your candidate numbers first, make a guess about a cell, check existing numbers and only then write a complete list of candidates, and only then check if there are more than one Analyze EMPTY cells for candidates and AS SOON as you find a cell with only one candidate: update puzzle state and corresponding row, column and square states. repeat those steps until puzzle is solved don't apologize or say any of that corporate bullshit