LinkedIn Queens answer for Wednesday, October 21: #904

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 Green region has only one open square left, so its queen goes in row 2, column 6 (R2C6).
2. Step 2: The Yellow region has only one open square left, so its queen goes in row 7, column 7 (R7C7).
3. Step 3: The Blue region sits entirely in column 4, so no other queen can go in column 4. The Pink region sits entirely in row 6, so no other queen can go in row 6. The Purple, Red and Pink regions sit entirely in columns 1, 2 and 3, so no other queen can go in those columns. Row 1 has only one open square left, so its queen goes in column 1 (Purple region) (R1C1).
4. Step 4: Row 3 has only one open square left, so its queen goes in column 4 (Blue region) (R3C4).
5. Step 5: The Orange region has only one open square left, so its queen goes in row 5, column 5 (R5C5).
6. Step 6: The Red region has only one open square left, so its queen goes in row 4, column 2 (R4C2).
7. Step 7: The Pink region has only one open square left, so its queen goes in row 6, column 3 (R6C3).

Answer coordinates: R1C1, R2C6, R3C4, R4C2, R5C5, R6C3, R7C7