Chess Board
[ECO code C02] Move Move Here
The Steinitz Variation

Black advanced his QBP to QB4(c5) to extend his pawn chain and threaten the base of White's centre.
White's Q4(d4) Pawn sometimes removes Black's threatening QBP on QB5(c5) to invite an exchange, as in Steinitz-Showalter, Vienna 1898. W-Alt.
	White   Black
 1.	P-K4    P-K3
 2.	P-Q4    P-Q4
 3.	P-K5    P-QB4
 4.	PxP

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