Queens cannot be adjacent to each other (including diagonals) — but they can share a long diagonal.
♚ Kings
Both kings go on gray cells only.
Kings cannot be adjacent to or on the same diagonal as any queen (at any distance).
Kings cannot share a row, column, or diagonal with each other.
Controls
Tap an empty cell → place a cross (✕) to mark it eliminated.
Double-tap a cross → upgrade to ♛ (on color) or ♚ (on gray).
Hold a placed piece → highlight its attack zones.
Drag across empty cells → place crosses quickly.
💡 Start with queens: look for estates with very few options, or rows/columns where only one estate fits. Use crosses to eliminate impossible cells, then narrow down to the solution!