The fourth round of the main tournament of the Capablanca Memorial has started at 23.00 Moscow time in Havana. The key game of the elite tournament is Ivanchuk - Nepomniachtchi. The Ukrainian is sharing the lead with Dominguez, while the Russian is half a point behind. The Cuban is testing his far less titled compatriot Quesada. In the third encounter Vladimir Potkin is playing against Victor Laznicka.