Bishops Opening Philidor Counterattack Discovered Check in Chess
In the bishops opening Philidor Counterattack, the “discovered check” motif happens when a piece moves away to reveal a bishop’s line to the enemy king. A defining feature is that your bishop (often on the long diagonal) is already lined up, and a tactical move like …c5 or …e5 (depending on the exact move order) creates the discovered-check moment against the king. The key is that the check is not the direct move itself, but the opening of a line by the preceding move.
To spot this motif, look for positions where your bishop’s diagonal to the king is blocked by a piece that can be moved with tempo—then check whether that move also attacks the king immediately (discovered check). In practice, you set it up by forcing the opponent’s pieces to sit on the same diagonal line, so that when you play the freeing move (commonly a pawn break like …c5/…e5 in Philidor structures), the bishop’s ray suddenly becomes a check. When you use it, calculate whether the opponent can capture the moving piece or interpose on the bishop’s line before responding to the check.
Frequently Asked Questions: bishops opening philidor counterattack discovered check
- What exactly makes it a “discovered check” in the bishops opening Philidor Counterattack?
- It’s discovered because the checking bishop’s line is opened by a different move (often a pawn or piece shift) that vacates the blocking square. The move itself may not be a check, but it reveals the bishop’s attack on the king.
- Which bishop lines are usually involved in this motif?
- Most commonly the long diagonal where your bishop already points toward the enemy king. The motif appears when a blocking piece on that diagonal can be moved (frequently via a Philidor pawn break) to reveal the check.
- How can I recognize the setup before the discovered check happens?
- Watch for a bishop already “aimed” at the king with only one piece/pawn in between. If that blocker is pinned, overloaded, or can be moved with tempo (like a thematic pawn break), you’re close to a discovered-check tactic.
- What should I calculate after I play the freeing move that reveals the check?
- Confirm the check is legal and see if the opponent can respond by capturing the vacating piece, blocking the bishop’s diagonal, or moving the king to a square that avoids follow-up tactics. Also check whether your bishop remains protected after the sequence, since the opponent may try to win the bishop on the next move.