Case Queens Level 2: 5×5 grid, 5 colored regions. Nine exhibits — queen coordinates R1C2, R2C5, R3C3, R4C1, R5C4. 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 10 cells — smaller regions often pin a queen to a single row intersection.
Exhibit 1: queen at R1C2. Region 2 only touches row 1 once on this board, so its queen must land at column 2.
Exhibit 2: queen at R2C5. Row 2, column 5 is the forced queen once region 3, row, column, and touch rules are applied together.
Exhibit 3: queen at R3C3. Region 4 only touches row 3 once on this board, so its queen must land at column 3.
Exhibit 4: queen at R4C1. After eliminations, row 4 has one legal square left — column 1.
Exhibit 5: queen at R5C4. After eliminations, row 5 has one legal square left — column 4.
Verdict: placement set R1C2, R2C5, R3C3, R4C1, R5C4 is consistent with every rule. Case closed.