Home › Openings › King's Gambit Declined › King's Gambit Declined: Classical Variation King's Gambit Declined: Classical Variation, Rubinstein Countergambit ECO C30 · 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 Related variationsKing's Gambit Declined: Classical Variation, Walthoffen AttackKing's Gambit Declined: Classical Variation, Rotlewi CountergambitKing's Gambit Declined: Classical Variation, Euwe Attack Practice this opening · Play against the computer