LinkedIn Queens answer for Friday, August 28: #850

Queens solution, step by step

Each LinkedIn Queens step places one queen and closes its row, its column, its region and the squares touching it.

1. Step 1: The Teal region sits entirely in row 7, so no other queen can go in row 7. The Pink region has only one open square left, so its queen goes in row 8, column 2 (R8C2).
2. Step 2: The Red region sits entirely in column 5, so no other queen can go in column 5. The Gray region sits entirely in row 9, so no other queen can go in row 9. The Orange, Yellow and Teal regions sit entirely in columns 7, 8 and 9, so no other queen can go in those columns. The Blue, Yellow and Red regions sit entirely in rows 4, 5 and 6, so no other queen can go in those rows. The Green region has only one open square left, so its queen goes in row 3, column 3 (R3C3).
3. Step 3: The Blue and Gray regions sit entirely in columns 4 and 6, so no other queen can go in those columns. A queen in row 5, column 4 would leave the Red region with no open square, so that square is out. A queen in row 5, column 5 would leave the Blue region with no open square, so that square is out. The Red region has only one open square left, so its queen goes in row 6, column 5 (R6C5).
4. Step 4: The Blue region has only one open square left, so its queen goes in row 4, column 6 (R4C6).
5. Step 5: The Yellow region has only one open square left, so its queen goes in row 5, column 9 (R5C9).
6. Step 6: The Orange region has only one open square left, so its queen goes in row 1, column 8 (R1C8).
7. Step 7: The Purple region has only one open square left, so its queen goes in row 2, column 1 (R2C1).
8. Step 8: The Teal region has only one open square left, so its queen goes in row 7, column 7 (R7C7).
9. Step 9: The Gray region has only one open square left, so its queen goes in row 9, column 4 (R9C4).

Answer coordinates: R1C8, R2C1, R3C3, R4C6, R5C9, R6C5, R7C7, R8C2, R9C4