A40 Polish Defence

A40 Modern Defence: Semi-Averbakh Variation Pterodactyl Variation Accepted

A40 Modern Defence: Semi-Averbakh Variation Pterodactyl Variation Declined

A40 Montevideo Defence

A40 Perrin Variation

A40 Poli Gambit

A40 Polish Defence

A40 Polish Defence: Spassky Gambit Accepted

A40 Pterodactyl Defence: Fianchetto Queen Benoni Pterodactyl

A40 Pterodactyl Defence: Fianchetto Queen Pterodactyl

A40 Pterodactyl Defence: Fianchetto Queen Pteronodon

A40 Pterodactyl Defence: Miscellany Queen Pterodactyl Quiet


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