Modern Defense Three Pawns Attack Skewer in Chess

In the Modern Defense Three Pawns Attack, Black often faces an early pawn storm that can open lines for tactics. A “skewer” here means a line-piece (typically a bishop or rook) attacks a more valuable piece behind a less valuable target, forcing the front piece to move and exposing the back piece. The defining feature is the pawn structure and open files created by the three-pawn pressure, which makes long-range pieces line up quickly.