St. Petersburg Variation, Romanishin-Psakhis Variation

The Romanishin-Psakhis Variation arises in the St. Petersburg Variation after 5. Ne2 c5 6. a3, when Black neither exchanges on c3 nor gives up the pin, but plays 6...Ba5 and keeps pressure on the c3-knight. White's usual answer is 7. Rb1, preparing b4 to harass the bishop. 7. Bd2 and 7. d5 are the main alternatives. The line is seldom played, the engine gives White a slight edge, and White has scored well in practice.