1.Boil, steam or microwave potato until just tender; drain. Cool, 5 minutes.
2.Combine potato in medium bowl with combined mayonnaise, chilli sauce, horseradish cream and onion. Combine sauerkraut and chives in small bowl.
3.Divide bread, corned beef, cheese, potato mixture and sliced pickles among serving plates; serve with sauerkraut mixture.