CREATE TABLE table_49848 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Round" TEXT, "Location" TEXT)

What method did Mikhail Ilyukhin win the fight in round 1 when his record was 13-5?
SELECT "Method" FROM table_49848 WHERE "Round" = '1' AND "Res." = 'win' AND "Record" = '13-5'
SELECT "Method" FROM "table_49848" WHERE "Record" = '13-5' AND "Res." = 'win' AND "Round" = '1'