6-Queens: solution: 1 ------------------------- | | Q | | | | | ------------------------- | | | | Q | | | ------------------------- | | | | | | Q | ------------------------- | Q | | | | | | ------------------------- | | | Q | | | | ------------------------- | | | | | Q | | ------------------------- solution: 2 ------------------------- | | | Q | | | | ------------------------- | | | | | | Q | ------------------------- | | Q | | | | | ------------------------- | | | | | Q | | ------------------------- | Q | | | | | | ------------------------- | | | | Q | | | ------------------------- solution: 3 ------------------------- | | | | Q | | | ------------------------- | Q | | | | | | ------------------------- | | | | | Q | | ------------------------- | | Q | | | | | ------------------------- | | | | | | Q | ------------------------- | | | Q | | | | ------------------------- solution: 4 ------------------------- | | | | | Q | | ------------------------- | | | Q | | | | ------------------------- | Q | | | | | | ------------------------- | | | | | | Q | ------------------------- | | | | Q | | | ------------------------- | | Q | | | | | -------------------------