Azerbaijani grandmaster Shahriyar Mammadyarov has strengthened his grip at the top of an international tournament in Dortmund, Germany, with a fourth round draw against world champion Vladimir Kramnik.
The day's other results are as follows: Vietnamese Le Quang Liem 1-0 Ukrainian Ruslan Ponomariov, German Arkadij Naiditsch 0.5-0.5 Hungarian Peter Leko.
Azerbaijani grandmaster Shahriyar Mammadyarov has strengthened his grip at the top of an international tournament in Dortmund, Germany, with a fourth round draw against world champion Vladimir Kramnik.