Simplify the following text for a Grade 9 native English-speaking person.
Original: Mikhail Ivanovich Chigorin also ( Tchigorin ; ) ( 12 November 1850 ( 31 October old style ) , Gatchina , Russia â `` 25 January 1908 , Lublin , Poland ) was a leading Russian chess player .
Simplified: Mikhail Ivanovich Chigorin ( Gatchina , Russia , 12 November 1850 â `` Lublin , Poland , 25 January 1908 ) was a leading Russian chess player .