White develops his King's Knight to prevent
Black's 5..P-K4 and support his own 6.P-Q4. Black's King's Knight develops to attack White's
K4(e4) knight, for an equal game.
White Black
1. P-K4 P-K3
2. Kt-QB3 P-Q4
3. P-KB4 PxP
4. KtxP B-Q2
5. Kt-KB3 Kt-KB3