[Event "Carlsbad"] [Site "Carlsbad"] [Round "0"] [White "Mattison"] [Black "Nimzovich"] [Result "0-1"] [ECO "E21"] [Opening "Nimzo-Indian: Three Knights"] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 Bxc3+ 5. bxc3 d6 6. Qc2 Qe7 7. Ba3 c5 8. g3 b6 9. Bg2 Bb7 10. O-O O-O 11. Nh4 Bxg2 12. Kxg2 Qb7+ 13. Kg1 Qa6 14. Qb3 Nc6 15. Rfd1 Na5 16. Qb5 Qxb5 17. cxb5 Nc4 18. Bc1 a6 19. bxa6 Rxa6 20. dxc5 bxc5 21. Ng2 Nd5 22. Rd3 Rfa8 23. e4 Ne5 #R 0-1