LinkedIn Queens answer for Saturday, August 15: #837

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 and Pink regions sit entirely in columns 1 and 2, so no other queen can go in those columns. The Orange region sits entirely in column 3, so no other queen can go in column 3. The Yellow region sits entirely in row 1, so no other queen can go in row 1. The Pink region has only one open square left, so its queen goes in row 2, column 1 (R2C1).
2. Step 2: The Red region has only one open square left, so its queen goes in row 3, column 8 (R3C8).
3. Step 3: The Green region sits entirely in column 9, so no other queen can go in column 9. The Purple region sits entirely in column 7, so no other queen can go in column 7. The Teal region sits entirely in row 9, so no other queen can go in row 9. The Orange, Blue and Green regions sit entirely in rows 4, 5 and 6, so no other queen can go in those rows. The Purple region has only one open square left, so its queen goes in row 7, column 7 (R7C7).
4. Step 4: A queen in row 4, column 3 would leave the Blue region with no open square, so that square is out. Row 4 has only one open square left, so its queen goes in column 2 (Blue region) (R4C2).
5. Step 5: The Orange region has only one open square left, so its queen goes in row 6, column 3 (R6C3).
6. Step 6: The Green region has only one open square left, so its queen goes in row 5, column 9 (R5C9).
7. Step 7: A queen in row 8, column 5 would leave the Teal region with no open square, so that square is out. The Gray region has only one open square left, so its queen goes in row 8, column 4 (R8C4).
8. Step 8: The Teal region has only one open square left, so its queen goes in row 9, column 6 (R9C6).
9. Step 9: The Yellow region has only one open square left, so its queen goes in row 1, column 5 (R1C5).

Answer coordinates: R1C5, R2C1, R3C8, R4C2, R5C9, R6C3, R7C7, R8C4, R9C6