Question: What is every 5-year peek with a when Anatoly Karpov, 2820 is 15-year peak?
SQL: SELECT "5-year peak" FROM "1-1710426-1" WHERE "15-year peak" = 'Anatoly Karpov, 2820';

Question: What is the highest rank when Garry Kasparov, 2879 is the 1-year peak?
SQL: SELECT MAX("Rank") FROM "1-1710426-1" WHERE "1-year peak" = 'Garry Kasparov, 2879';

Question: What is every 5-year peak when Emanuel Lasker, 2847 is the 10-year peak?
SQL: SELECT "5-year peak" FROM "1-1710426-1" WHERE "10-year peak" = 'Emanuel Lasker, 2847';

Question: What is the highest rank when Anatoly Karpov, 2820 is the 15-year peak?
SQL: SELECT MAX("Rank") FROM "1-1710426-1" WHERE "15-year peak" = 'Anatoly Karpov, 2820';