Which people had the best 10-year period when Capablanca had the best 15-year period?
CREATE TABLE "moves_played_compared_with_computer_choi" (
  "position" real,
  "best_year" text,
  "best_2_year_period" text,
  "best_3_year_period" text,
  "best_5_year_period" text,
  "best_10_year_period" text,
  "best_15_year_period" text
);
SELECT "best_10_year_period" FROM "moves_played_compared_with_computer_choi" WHERE "best_15_year_period"='Capablanca';