CREATE TABLE table_49637 ("Rank" FLOAT, "1-year peak" TEXT, "5-year peak" TEXT, "10-year peak" TEXT, "15-year peak" TEXT, "20-year peak" TEXT)

What is the 1-year peak with anatoly karpov, 2821 as the 10-year peak?
SELECT "1-year peak" FROM table_49637 WHERE "10-year peak" = 'anatoly karpov, 2821'
SELECT "1-year peak" FROM "table_49637" WHERE "10-year peak" = 'anatoly karpov, 2821'