Training notebook · Tactics
Discovered attack training: give both pieces a job
A discovered attack works because moving one piece activates another. The difficult part is choosing a useful destination for the moving piece without losing the threat uncovered behind it.
A position to work through
Calculate a candidate continuation without moving the pieces. Look for the tactical idea, consider the opponent’s reply, then compare your calculation with the recorded line.
Black to move
Compare with the recorded continuation
Nf3+ · Rxf3 · Qxd4+
This is a line from the training source, not a claim that every alternative has the same outcome. Calculate the opponent’s reply before revealing it.
Lichess CC0 puzzle database; position from Brass Pawn’s curated training data
Identify the battery before choosing a move
Look for your rook, bishop or queen behind one of your own pieces. Follow that line to an opposing target. If the front piece moved, would the rear piece attack anything important? If not, the arrangement may be useful later but it is not yet a tactical threat.
Name the rear piece's target explicitly. Solvers often notice that a diagonal opens and then forget to check whether the target can simply move to safety. An uncovered attack needs either enough value or enough force to justify the move.
Give the departing piece a forcing destination
Now search the front piece's legal moves for checks, captures and direct threats. A checking move can make the uncovered attack especially effective, but only if the opponent cannot answer the check while neutralising the rear threat.
Keep the two attacks separate in your notes. One line might say 'bishop attacks queen'; the other might say 'knight checks king'. If both notes concern the same target, you may merely be increasing pressure rather than creating the independent problems that make a discovered attack hard to meet.
Check the cost of opening the line
Moving the screening piece can expose your own king, abandon a defender, or permit a countercheck. Examine those changes before collecting the target. If your move is not check, the opponent may ignore the queen attack and threaten mate instead.
In review, compare two destinations for the moving piece. Prefer the one that keeps the combination sound against best defence, not the one with the most dramatic appearance. A modest safe move can win more reliably than a checking sacrifice that lets the opponent escape.
Check both roles after the defender replies
When the front piece moves with check, verify that the checking line stays open after the defender replies. A king capture might remove the piece you expected to collect a target with later. Conversely, a modest move attacking an undefended rook may be enough when the rear piece attacks the queen. Compare the defender's urgent choices directly. The strength comes from incompatible replies, not from giving check at all costs or uncovering any diagonal. Keep both roles visible throughout the actual continuation.
Describe the two pieces’ jobs before moving
Take five discovered-attack puzzles and pause before moving. Write two sentences: what the rear piece attacks, and what the front piece does. Calculate the strongest reply to each sentence separately, then ask whether one reply solves both problems.
After the session, choose a missed position and remove the motif label. Explain the battery to another person or aloud. If you cannot name both roles without the answer displayed, repeat that position later rather than adding more puzzles immediately.
Put the practice into a routine
Where Brass Pawn fits
Use Brass Pawn's local tactics practice to test complete solutions, then classify the two pieces' roles in your own notes. The app's engine feedback is position analysis, not a conversational tutor or proof that every battery wins material.