LinkedIn Queens answer for Thursday, July 30: #821

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 Yellow, Red, Pink and Gray regions sit entirely in columns 4, 5, 6 and 7, so no other queen can go in those columns. The Green region has only one open square left, so its queen goes in row 4, column 3 (R4C3).
2. Step 2: The Blue region sits entirely in column 8, so no other queen can go in column 8. The Teal region has only one open square left, so its queen goes in row 8, column 9 (R8C9).
3. Step 3: Column 4 has only one open square left, so its queen goes in row 9 (Gray region) (R9C4).
4. Step 4: A queen in row 1, column 2 would leave the Purple region with no open square, so that square is out. Row 1 has only one open square left, so its queen goes in column 1 (Purple region) (R1C1).
5. Step 5: Row 2 has only one open square left, so its queen goes in column 8 (Blue region) (R2C8).
6. Step 6: The Orange and Pink regions sit entirely in rows 6 and 7, so no other queen can go in those rows. The Red region sits entirely in row 5, so no other queen can go in row 5. Column 7 has only one open square left, so its queen goes in row 6 (Pink region) (R6C7).
7. Step 7: The Orange region has only one open square left, so its queen goes in row 7, column 2 (R7C2).
8. Step 8: The Red region has only one open square left, so its queen goes in row 5, column 5 (R5C5).
9. Step 9: The Yellow region has only one open square left, so its queen goes in row 3, column 6 (R3C6).

Answer coordinates: R1C1, R2C8, R3C6, R4C3, R5C5, R6C7, R7C2, R8C9, R9C4