Over the course of his career, Csom defeated many top Grandmasters, including Ulf Andersson, Boris Gulko, Tony Miles, Lajos Portisch, Samuel Reshevsky, Nigel Short, former World Champion Mikhail Tal, Rafael Vaganian, and Arthur Yussupov.
István Szabó | István Tarlós | Istvan Javorek | István Anhalt | Zoltan Istvan | Istvan Kantor | SMS Szent István | István Várdai | István Türr | István Tisza | István T. Horváth | István Thomán | István Szent-Iványi | István Mudin | István Lülik | István Kovacsóczy | István Gyenesei | István Geleji Katona | István Gaál | István Bujtor | István Bibó | István, a király |