[what is this?]

[what is this?]

Art of attack 23 games, 1859-2007 Blitzpartien 63 games, 1620-2006 famous games 22 games, 1834-2004 game of the day 50 games, 1858-2009 IQP 1 game, 2006 KID for black 55 games, 1923-2009 KID with Na6 6 games, 2000-2012 Morra gambit 7 games, 1846-2011 Najdorf for black 4 games, 1962-2006 nice endgames 8 games, 1921-2007 Noteboom system 4 games, 1991-2007 Panov Botvinnik attack 8 games, 1932-1996 Pirc 150 attack 2 games, 2010-2012 power of pawns 4 games, 1962-1999 Rubinsteins opening 2 games, 1903-1983 shakespeare's favorite games 43 games, 1849-2008 Sicilian special 1 game, 1982 Super Strategiespiele 21 games, 1864-2005