[ECO code C23]
The Pratt Variation
Black castles bringing his KR towards the open file and should have no problem defending his position.
White Black White Black 1. P-K4 P-K4 6. PxKt PxB 2. B-B4 B-B4 7. Q-R5 0-0 3. P-QB3 Kt-KB3 4. P-Q4 PxP 5. P-K5 P-Q4
Example ends: Undo or Jump or Clear