1873-1899 1901- 1901-1981 1916- 1931- 1931-2016 1937- 1943- 1951- adams anatoly beispielsammlung biography bobby borisvasilyevich charousek chess chesschampionships chesschampionships:worldchesschampionshipgames chessplayers collections england estonia euwe fischer frenchdefense(chess) gv1455 history historyworldchesschampionship john karpov kasparov keres korchnoi korchnoĭ lev max michael nunn openings paul polugaevskiĭ rudolph russia(federation) saintpetersburg schach sovietunion spassky to1937 tournaments viktor viswanathananand