LinkedIn Queens answer for Sunday, July 26: #817

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 Blue region has only one open square left, so its queen goes in row 7, column 7 (R7C7).
2. Step 2: The Teal region sits entirely in row 9, so no other queen can go in row 9. The Pink region sits entirely in column 9, so no other queen can go in column 9. The Red region has only one open square left, so its queen goes in row 5, column 8 (R5C8).
3. Step 3: The Orange region has only one open square left, so its queen goes in row 4, column 6 (R4C6).
4. Step 4: The Pink region has only one open square left, so its queen goes in row 8, column 9 (R8C9).
5. Step 5: The Yellow region sits entirely in row 1, so no other queen can go in row 1. The Gray region sits entirely in column 5, so no other queen can go in column 5. The Yellow and Teal regions sit entirely in columns 3 and 4, so no other queen can go in those columns. The Purple region sits entirely in column 2, so no other queen can go in column 2. Row 3 has only one open square left, so its queen goes in column 1 (Green region) (R3C1).
6. Step 6: The Purple region has only one open square left, so its queen goes in row 6, column 2 (R6C2).
7. Step 7: The Gray region has only one open square left, so its queen goes in row 2, column 5 (R2C5).
8. Step 8: The Yellow region has only one open square left, so its queen goes in row 1, column 3 (R1C3).
9. Step 9: The Teal region has only one open square left, so its queen goes in row 9, column 4 (R9C4).

Answer coordinates: R1C3, R2C5, R3C1, R4C6, R5C8, R6C2, R7C7, R8C9, R9C4