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Castle Lock: Queen's Gambit line
Engine-verified opening line.
d4
d5
c4
e6
Nc3
Bb4
e3
Bxc3+
bxc3
Nf6
Ba3
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Queen's Gambit Declined
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Castle Lock
Queen's · Castle Lock
LINE · QUEEN'S · AS WHITE
Castle Lock
Engine-verified opening line.
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Queen's
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Queen's Gambit Declined
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Castle Lock
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Queen's Gambit Mastery · C7 Crush
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