Case LinkedIn Queens #797: 7×7 grid, 7 colored regions. Nine exhibits — queen coordinates R1C1, R2C3, R3C7, R4C5, R5C2, R6C6, R7C4. No two queens may share row, column, region, or adjacency.
Board spotlight: Several color regions span only a few cells — scan those regions first because they often force a queen into a single row or column. Region sizes range from 1 to 18 cells — smaller regions often pin a queen to a single row intersection.
Exhibit 1: queen at R1C1. Region 1 only touches row 1 once on this board, so its queen must land at column 1.
Exhibit 2: queen at R2C3. Row 2, column 3 is the forced queen once region 2, row, column, and touch rules are applied together.
Exhibit 3: queen at R3C7. Row 3, column 7 is the forced queen once region 3, row, column, and touch rules are applied together.
Exhibit 4: queen at R4C5. Row 4, column 5 is the forced queen once region 5, row, column, and touch rules are applied together.
Exhibit 5: queen at R5C2. After eliminations, row 5 has one legal square left — column 2.
Exhibit 6: queen at R6C6. After eliminations, row 6 has one legal square left — column 6.
Exhibit 7: queen at R7C4. After eliminations, row 7 has one legal square left — column 4.
Verdict: placement set R1C1, R2C3, R3C7, R4C5, R5C2, R6C6, R7C4 is consistent with every rule. Case closed.