...Bb4+ Check

1.e4 e5 2.d4 exd4 3.c3 dxc3 4.Bc4 cxb2 5.Bxb2 Bb4+

Because White has already moved the d-pawn, the diagonal to e1 is open. Black can use ...Bb4+ to force a response and steal a tempo against White's development.

ECO Code

C22

Difficulty

Advanced

Style

Counterplay/Tempo

Key Theme

Check for tempo

How White Meets the Check

Block

6.Nd2

Develop a piece while meeting the check. White keeps the king in place and continues building the attack.

Black's Follow-Up

...d6 and ...Nf6

Black uses the tempo to finish development and aim for king safety. Holding extra pawns becomes easier.

White's Goal

Nf3 and 0-0

White still wants to castle and create threats. The question is whether the check slowed things down enough.

Common Pitfalls

For White: Don't overreact to the check with slow king moves that delay development.

For Black: If you give the check but then waste time, White's bishops will still dominate open lines.

Steal a Tempo

...Bb4+ is a practical way for Black to disrupt White's rhythm and aim for safer development.

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