LinkedIn Tango #607 Answer & Analysis

Record original givens. Spot the Equal edge linking R6C2–R6C3 (cells 31–32). Because these two must be identical and row 6 already has a given Sun at R6C5 and a Moon at R6C6, the only way to satisfy three Suns and three Moons in row 6 is to make the equal pair both Suns.

Use Cross edges that touch already decided cells. The Cross between R5C2 and R6C2 (cell 25 bottomEdge crosses cell 31) means R5C2 must be the opposite of R6C2. With R6C2 = Sun, R5C2 becomes Moon.

The Cross between R4C2 and R5C2 (cell 19 bottomEdge is Cross to cell 25) forces R4C2 to be the opposite of R5C2. With R5C2 = Moon, R4C2 must be Sun. This gives a solid anchor in column 2.

There is a Cross chain connecting R1C5–R2C5–R3C5 (cells 4–10–16). Cross edges mean adjacent cells alternate. Using row/column balance and the previously placed symbols, the pattern that fits without creating a triple and that satisfies the column counts is R1C5 = Sun, R2C5 = Moon, R3C5 = Sun.

With the major chains resolved and a number of cells fixed, finish by checking each row and column so that each has three Suns and three Moons and that no three identical symbols appear consecutively. Place cells that would otherwise cause a triple or break balance. Example forced placements: R1C3 = Sun and R2C1 = Sun — these follow from local balance and preventing triples; continue similarly to fill the board.