Analysis of information sources in references of the Wikipedia article "Milan Matulović" in English language version.
In a tournament game between Matulovic and Bilek in 1970, the former moved a piece, then saw that it would entail the loss of the game. He quickly said "J'adoube" and calmly proceeded to make another move. The astounded Bilek was too stunned to protest and Matulovic went on to win the game. The chess masters who witnessed the incident thereafter referred to Matulovic as 'J'adoubovic'.
