He was an early advocate of speeding up competitive chess, and introduced a digital chess clock which adds a small time increment for each move made, a variant of which has become very popular in recent years.
He was an early advocate of speeding up competitive chess. He introduced a digital chess clock. This digital chess clock adds a small time increment for each move, a variant of which has become very popular in recent years. This move is made, a variant of which has become very popular in recent years.