LinkedIn Queens answer for Thursday, July 16: #807

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 Purple and Pink regions sit entirely in columns 1 and 2, so no other queen can go in those columns. The Green and Red regions sit entirely in rows 1 and 2, so no other queen can go in those rows. The Orange region has only one open square left, so its queen goes in row 3, column 3 (R3C3).
2. Step 2: The Purple region has only one open square left, so its queen goes in row 4, column 1 (R4C1).
3. Step 3: The Pink region has only one open square left, so its queen goes in row 6, column 2 (R6C2).
4. Step 4: The Teal region has only one open square left, so its queen goes in row 8, column 4 (R8C4).
5. Step 5: The Gray region has only one open square left, so its queen goes in row 9, column 6 (R9C6).
6. Step 6: The Yellow region has only one open square left, so its queen goes in row 7, column 9 (R7C9).
7. Step 7: A queen in row 1, column 7 would leave the Red region with no open square, so that square is out. The Green region sits entirely in column 8, so no other queen can go in column 8. A queen in row 1, column 8 would leave the Red region with no open square, so that square is out. The Green region has only one open square left, so its queen goes in row 2, column 8 (R2C8).
8. Step 8: The Red region has only one open square left, so its queen goes in row 1, column 5 (R1C5).
9. Step 9: The Blue region has only one open square left, so its queen goes in row 5, column 7 (R5C7).

Answer coordinates: R1C5, R2C8, R3C3, R4C1, R5C7, R6C2, R7C9, R8C4, R9C6