World champion Vishwanathan Anand settled for a draw with Grandmaster Vassily Ivanchuk of Ukraine in the sixth round to remain in joint lead in the 65th Corus Chess tournament in Wijk Aan Zee, the Netherlands, on Sunday.

He shares the lead with the world's highest rated woman, Judit Polgar of Hungary, and local star Loek Van Wely, who beat Evgeny Bareev of Russia.

All three have four points each and are followed by GM Alexie Shirov of Spain, who was defeated by Polish GM Michal Krasenkow on Saturday.

Shirov is on 3.5 points while five players -- Braingames champion Vladimir Kramnik, Alexander Grischuk [both Russia], Veselin Topalov [Bulgaria], Bareev and Ivanchuk -- shared the fifth spot with three points each.

There are seven more rounds remaining in the 14-player tournament.

Ivanchuk has not shown any brilliance in this event. In fact, the magician from Lvov, Ukraine, has not gone past the 20th move in the last four rounds and has agreed to draws just after or during the opening.

It was a Queen's Indian defence. The opening moves were played quickly and just one minor piece and a pawn were exchanged when the draw was agreed to on the 13th move.

In the next round the Indian will match wits against Ruslan Ponomariov with white pieces.

In the Grandmaster 'B' tournament, former world junior girls champion Koneru Humpy went down against GM Jonny Hector of Sweden.

Top seed GM Zhang Zhong of China continued his winning run and scalped Dutch GM Harmen Jonkman to reach 5.5 points from six games.

Humpy is placed a distant 12th on 1.5 points.