LinkedIn Queens answer for Sunday, September 6: #859

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 Red region sits entirely in row 5, so no other queen can go in row 5. The Green, Yellow and Pink regions sit entirely in rows 6, 7 and 8, so no other queen can go in those rows. The Blue region sits entirely in column 5, so no other queen can go in column 5. The Purple, Orange and Blue regions sit entirely in rows 2, 3 and 4, so no other queen can go in those rows. The Teal region sits entirely in row 9, so no other queen can go in row 9. Column 9 has only one open square left, so its queen goes in row 1 (Gray region) (R1C9).
2. Step 2: Column 1 has only one open square left, so its queen goes in row 9 (Teal region) (R9C1).
3. Step 3: The Orange, Yellow and Red regions sit entirely in columns 6, 7 and 8, so no other queen can go in those columns. The Pink region has only one open square left, so its queen goes in row 7, column 4 (R7C4).
4. Step 4: The Green region has only one open square left, so its queen goes in row 6, column 2 (R6C2).
5. Step 5: Column 8 has only one open square left, so its queen goes in row 3 (Orange region) (R3C8).
6. Step 6: The Blue region has only one open square left, so its queen goes in row 4, column 5 (R4C5).
7. Step 7: The Purple region has only one open square left, so its queen goes in row 2, column 3 (R2C3).
8. Step 8: The Red region has only one open square left, so its queen goes in row 5, column 7 (R5C7).
9. Step 9: The Yellow region has only one open square left, so its queen goes in row 8, column 6 (R8C6).

Answer coordinates: R1C9, R2C3, R3C8, R4C5, R5C7, R6C2, R7C4, R8C6, R9C1