Indian Defense Accelerated London System Discovered Attack in Chess
In the Indian Defense Accelerated London System, the “discovered attack” motif happens when a piece moves off a line and suddenly reveals an attack on a more valuable target behind it. A defining feature is the common alignment of your dark-squared bishop/queen with the kingside or center after you play a freeing move (often involving the c- or e-pawn structure) that opens a diagonal or file. The tactic is usually tactical rather than positional: the revealed piece attacks a king, queen, or pinned defender at the exact moment the blocker shifts.
To spot the indian defense accelerated london system discovered attack, look for your own “blocker” piece that can move with tempo—especially when moving it also attacks something or forces a response. In practice, you want a line (diagonal or file) where the hidden attacker would hit the enemy king/queen if the blocker shifts; then calculate whether the opponent’s reply can’t simply capture the revealed attacker or interpose. When using it, prepare the discovered line with accurate piece placement (bishop/queen alignment) and choose the freeing move so the revealed attack creates a threat the opponent can’t meet in one move.
Frequently Asked Questions: indian defense accelerated london system discovered attack
- What exactly makes it a “discovered attack” in the Indian Defense Accelerated London System?
- It’s when a move removes a piece that was blocking a line, revealing an attack on a key target (often the king, queen, or a pinned defender) behind that blocker. The defining element is the sudden line opening that creates the threat immediately.
- Which pieces are usually involved as the blocker and the revealed attacker?
- Commonly, a pawn or minor piece acts as the blocker on a diagonal/file, while the revealed attacker is typically your bishop or queen (sometimes with help from a rook on the same line after the opening). The key is that the line must already be “loaded” before the freeing move.
- How can I recognize the tactic during a game without calculating everything?
- Watch for moments when your pieces line up on a diagonal or file toward the opponent’s king/queen and you have a legal move that would shift the blocking piece. If that move also improves your position or attacks something, it’s a strong candidate for a discovered attack.
- What’s the most common mistake when trying to play this motif?
- Playing the freeing move without checking whether the opponent can capture the revealed attacker, interpose a piece, or use tempo to neutralize the threat. Another frequent error is choosing a blocker move that opens the line but doesn’t create an immediate threat the opponent must answer.