411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nd4/4. Nxd4
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Blackburne Shilling Gambit rd bd qd kd bd nd rd pd pd pd pd pd pd pd pd bl nl pl pl pl pl pl pl pl pl rl nl bl ql kl rl Italian Game
4. Nxd4
Instead of accepting the gambitted pawn, white declines it and instead trades the knights in the center.
Blackburne Shilling Gambit