Question: state team #2 in the match of first leg score 0-1
SQL: SELECT "Team #2" FROM "1-21434618-1" WHERE "1st leg" = '0-1';

Question: give the 1st leg score against Ilisiakos
SQL: SELECT "1st leg" FROM "1-21434618-1" WHERE "Team #2" = 'Ilisiakos';

Question: which team #1 played again Chalkida
SQL: SELECT "Team #1" FROM "1-21434618-1" WHERE "Team #2" = 'Chalkida';

Question: which team#2 played against Poseidon Neoi Porroi
SQL: SELECT "Team #2" FROM "1-21434618-1" WHERE "Team #1" = 'Poseidon Neoi Porroi';