Blackmar-Diemer Gambit – Ryder Variation
An ambitious gambit by White with 2.e4 vs. the d5 defense. The Ryder Variation adds extra complications with early f3/e4 pushes.

Line preview
32 moves in the full line
1.d2-d4
d7-d5
2.e2-e4
d5-xe
3.b1-c3
g8-f6
4.f2-f3
e4-xf
…and 24 more moves
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