The Big Chess Crossword Puzzle (GM Edition)

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Across
  1. 4. Bulgarian GM, World Champion in 2005
  2. 7. Armenian GM, known for his creative and attacking play
  3. 10. Indian GM, 5-time World Chess Champion
  4. 11. Russian GM, first World Champion to regain his title
  5. 14. First official World Chess Champion in history
  6. 16. Armenian GM, famous for his defensive style
  7. 18. Defeated Spassky in 1972 to become World Champion
  8. 20. German GM, held the World Championship title for 27 years
Down
  1. 1. Cuban GM, known for his incredible endgame skills
  2. 2. Russian GM, lost the 1972 World Championship to Fischer
  3. 3. Soviet GM, known as the "Patriarch of Soviet Chess"
  4. 5. Russian GM, youngest World Champion at 22
  5. 6. Norwegian GM, 5-time World Champion
  6. 8. Israeli GM, played Anand for the 2012 World Championship
  7. 9. American chess prodigy from the 1800s
  8. 12. Polish-American GM, child prodigy in chess
  9. 13. Russian GM, defeated Kasparov in 2000 to become World Champion
  10. 15. Latvian GM, famous for his aggressive attacking style
  11. 17. Soviet GM, World Champion in 1957
  12. 19. Soviet GM, dominated the 1970s and 80s