Puzzle 171792:
Puzzle 171792:
GM Sergei Tiviakov (2659) - GM Sipke Ernst (2554)
Bundesliga 2012-13 Hamburg GER (11), 2013.03.16 Tiviakov - Ernst, Hamburg 2013
Bundesliga 2012-13 Hamburg GER (11), 2013.03.16 Tiviakov - Ernst, Hamburg 2013