Russian Chin-San rating system is worked out by Russian Go and Strategy School. Like in Japan where there are kyu and dan, and Chinese chi and tuan, in Russia we adopted Chin and San rate.
Russian words Chin and San have a very deep sense. “Chin” means: rank, grade, to begin, to repair, officially. “San” means the rank of nobles (like “lord” or “marquis”) and priests. Russian system has a principal difference from the usual rating system. The ranks of our system are awarded only after qualification procedure (10 games with the strongest Go Masters).