7/23/2020 – At the Candidates Tournament 1962 in Curacao, Mikhail Tal (pictured) lost a tricky rook endgame against the eventual tournament winner and World Champion to be Tigran Petrosian. But did Tal lose only after one or more mistakes? Endgame specialist Karsten Müller asked for the readers’ help and came to a conclusion: Tal could have held the draw!

7/16/2020 – Join in and have fun by analysing a historically important endgame: At the Candidates Tournament 1962 in Curacao Mikhail Tal lost a tricky rook endgame against the eventual tournament winner and World Champion to be Tigran Petrosian. But was the endgame really objectively lost or did Tal lose only after one or more mistakes? Karsten Müller asks for your help!

7/7/2020 – One draw in a crucial game and David Bronstein would have been World Champion. After losing a difficult ending in the crucial 23rd game Bronstein drew the World Championship Match 1951 against Mikhail Botvinnik which allowed Botvinnik to keep the title. Now Karsten Müller wanted to know whether this ending was indeed lost or whether Bronstein had a draw. Karsten Müller asked the ChessBase readers for help to solve this historical riddle, and now, after long and difficult analyses and a debate about the 50-move-rule he has an answer: Bronstein indeed missed a draw in this historically important game!

6/10/2020 – After the 2nd World War the Soviet Union largely dominated world chess. Mikhail Botvinnik won the World Championship tournament in The Hague and Moscow in 1948. In 1951 Botvinnik was the clear favourite in the World Championship match against David Bronstein which was played in Moscow's Tchaikovsky Concert Hall. After 22 games Bronstein was leading 11½-10½, and needed just one win (or two draws) to become World Champion. Did he miss a chance in game 23?