[ECO code D59]
Tartakower Variation
Black advances his QBPawn to QB4(c5) to challenge White's QP, for 13..R-B1! with equality.
White Black White Black 1. P-Q4 P-Q4 7. B-R4 P-QKt3 2. P-QB4 P-K3 8. PxP KtxP! 3. Kt-QB3 Kt-KB3 9. BxB QxB 4. B-Kt5 B-K2 10. KtxKt PxKt 5. P-K3 0-0 11. R-B1 B-K3 6. Kt-B3 P-KR3 12. Q-R4 P-QB4
Example ends: Undo or Jump or Clear