LinkedIn Queens #810 is a 9×9 Queens board with 9 color regions (cells per region: 5–21). Solution placements: R1C1, R2C4, R3C7, R4C3, R5C5, R6C8, R7C2, R8C6, R9C9. Each queen owns one row, one column, one region, and cannot touch another queen even diagonally.
Board spotlight: Regions are evenly sized — work region-by-region while keeping row and column parity in mind. Region sizes range from 5 to 21 cells — smaller regions often pin a queen to a single row intersection.
Row 1 → column 1 (region 1). Row 1, column 1 is the forced queen once region 1, row, column, and touch rules are applied together. Elimination: Placing here claims row 1, column 1, and region 1. Auto X marks will block 80 other cells from holding another queen in those units.
Row 2 → column 4 (region 2). Row 2, column 4 is the forced queen once region 2, row, column, and touch rules are applied together. Elimination: Placing here claims row 2, column 4, and region 2. Auto X marks will block 80 other cells from holding another queen in those units.
Row 3 → column 7 (region 3). Row 3, column 7 is the forced queen once region 3, row, column, and touch rules are applied together. Elimination: Placing here claims row 3, column 7, and region 3. Auto X marks will block 80 other cells from holding another queen in those units.
Row 4 → column 3 (region 5). Row 4, column 3 is the forced queen once region 5, row, column, and touch rules are applied together. Elimination: Placing here claims row 4, column 3, and region 5. Auto X marks will block 80 other cells from holding another queen in those units.
Row 5 → column 5 (region 4). Row 5, column 5 is the forced queen once region 4, row, column, and touch rules are applied together. Elimination: Placing here claims row 5, column 5, and region 4. Auto X marks will block 80 other cells from holding another queen in those units.
Row 6 → column 8 (region 7). Row 6, column 8 is the forced queen once region 7, row, column, and touch rules are applied together. Elimination: Placing here claims row 6, column 8, and region 7. Auto X marks will block 80 other cells from holding another queen in those units.
Row 7 → column 2 (region 6). Region 6 only touches row 7 once on this board, so its queen must land at column 2. Elimination: Placing here claims row 7, column 2, and region 6. Auto X marks will block 80 other cells from holding another queen in those units.
Row 8 → column 6 (region 9). Row 8, column 6 is the forced queen once region 9, row, column, and touch rules are applied together. Elimination: Placing here claims row 8, column 6, and region 9. Auto X marks will block 80 other cells from holding another queen in those units.
Row 9 → column 9 (region 8). After eliminations, row 9 has one legal square left — column 9. Elimination: Placing here claims row 9, column 9, and region 8. Auto X marks will block 80 other cells from holding another queen in those units.
Final verification: R1C1, R2C4, R3C7, R4C3, R5C5, R6C8, R7C2, R8C6, R9C9 satisfies all 9 rows, columns, and regions with zero adjacency conflicts. Pattern tag: balanced region layout.