Completed the following sentence: Anderssen won the
1862 London chess tournament, the first international round-robin tournament (in which each participant plays a game against each of the others) with a score of twelve wins out of thirteen games. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk> Morphy retired from chess at this time, so Anderssen was again generally regarded as the world's leading active player.<unk> Morphy retired from chess at this time, so Anderssen was again generally regarded as the world's leading active player.