Movsesian, 20, replaced the 19-year-old Leko as the youngest player remaining when he defeated the 11th-seeded Hungarian yesterday. Movsesian and 15 others advance to the fourth round.

Leko became widely known as a `wunderkid' in the early 1990s when he gained the Grandmaster title at the age of 14. He was one of the favourites to win the tournament at Caesars Palace being sponsored by the Federation Internationale des Echecs.

Movsesian crushed Leko in their first game. Movsesian described the game as ``kind of a massacre''.

In the second game, Leko seemed to have Movsesian tied up. But Movsesian managed to wiggle free and force a position where Leko could not prevent being checked on every move. The draw secured the little-known Movsesian his place in the sweet 16.

In other games, second-ranked Alexei Shirov of Spain returned to form as he sweptboth games from Brazil's Gilberto Milos, the 50th seed.

In the first game, Milos made the mistake of creating weaknesses around his king. This was a big mistake against Shirov, one of the most feared attacking players in the game. The Spaniard quickly forced a checkmate. Shirov easily won the second game.

Only the match between 12th-seeded Boris Gelfand of Israel and 60th-ranked Joel Lautier of France went to the second tie-break set.

Their first set of the day produced two wild draws. Gelfand seemed to have a positional advantage in the first game, but the Frenchman wiggled off the hook.

The string of draws was broken in the first game of the second set. Gelfand played a beautiful game to go ahead by a point.

In the final game, Lautier played somewhat passively. The experienced Gelfand seized the initiative and broke through to move on.