Diagonal

Referenced by

• Battery — A battery consists of two or more same-colour pieces aligned on a file, rank or diagonal, with the stronger piece behind, so the front unit can move to unleash the rear piece’s concentrated pressure.
• Battery Play — A battery consists of two or more same-color pieces aligned on a rank, file, or diagonal so the rear piece supports or attacks through the forward piece once it moves or captures.
• Blackburne's Mate — Blackburne's Mate is a checkmate pattern in which a bishop protected by a knight delivers mate along a diagonal to a king whose flight squares are blocked by its own pieces or the board edge.
• Boden's Mate — Boden's mate is a checkmate pattern in which two bishops on adjacent diagonals attack a king whose own pieces or pawns block its escape squares, most often after queenside castling.
• Center Camper — A center camper is a piece, most often a knight, that occupies or firmly controls one of the four central squares to dominate key lines and restrict the opponent.
• Country Move — A country move is a natural-looking but usually suboptimal chess move that an inexperienced player might choose without deeper calculation.
• Cross Pin — A cross pin is a tactic in which one piece pins two enemy units along intersecting lines, so that either may be captured if it moves.
• Dovetail Mate — A dovetail mate is a queen mate against a king whose own pieces block its flight squares in a dovetail-like pattern, typically on the edge of the board.
• En Prise — A piece or pawn attacked by an opponent and insufficiently defended, allowing the opponent to capture it safely.
• Extended Fianchetto — An extended fianchetto develops a bishop to a3, a6, h3 or h6 to control a long diagonal from farther out on the flank than a standard fianchetto.
• Fianchetto — A fianchetto develops a bishop to b2, g2, b7 or g7 after the adjacent knight pawn advances one square, allowing it to control the long diagonal and influence the centre from a protected flank position.
• Outpost — An outpost is a square, typically advanced in the opponent's half of the board, that cannot be attacked by an enemy pawn and is therefore a secure base for a piece, usually a knight, often protected by one of your own pawns.
• Pawn Chain — A pawn chain is a diagonal line of same-color pawns on adjacent files, each protecting the one ahead while being protected by the one behind.
• Raking Bishops — Raking bishops are a pair of bishops posted on adjacent open diagonals, where they sweep across the board and create powerful attacking or controlling pressure.
• Skewer — A skewer is a tactic in which an attacker forces a more valuable enemy piece to move along a shared rank, file, or diagonal, thereby exposing a less valuable piece behind it to capture.
• Tall Pawn — A tall pawn is a bishop so hemmed in by its own pawns that it has little more scope or value than a pawn despite its greater height.
• X-Ray Attack — An X-ray attack occurs when a piece attacks through an opposing piece to threaten a more valuable target behind it on the same rank, file or diagonal.