Pterodactyl Defense Sicilian Discovered Check in Chess

In the Pterodactyl Defense Sicilian, a “discovered check” happens when one piece moves away (often a pawn or the defender’s piece that was blocking a line), revealing a check on the enemy king. The defining feature is that the move is both a tempo-gaining threat (check) and a tactical pivot, usually tied to the Pterodactyl setup’s active lines against the black king.