Ruslan Ponomariov vs Sergey Karjakin - Dortmund Sparkassen 2012.07.16

Ruslan Ponomariov vs Sergey Karjakin<br>Dortmund Sparkassen Dortmund GER round 4 2012.07.16<br>Ruy Lopez: Berlin Defense, Berlin Wall 1/2-1/2<br>https://www.chessgames.com/perl/chessgame?gid=1672200 --- Send in a voice message: https://anchor.fm/blindfoldchess/message