Training notebook · Tactics
Build a mating net by counting escape squares
A mating net restricts the king until a decisive check becomes possible. Train the king's legal escape squares and the roles of supporting pieces, rather than collecting checks without a destination.
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.
White to move
Compare with the recorded continuation
Qh6+ · Kg8 · Qg7#
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
Map the king's current freedom
List neighbouring squares, friendly blockers and enemy control. Separate a square that is physically empty from one the king can legally enter. Pawn control matters even if the pawn cannot advance, and a pinned enemy piece can still attack a square for king-safety purposes.
Now inspect routes beyond the first ring of squares. A check may drive the king away from danger if it opens a path toward defenders. The aim is a net that tightens, not a sequence of impressive-looking checks that escorts the king to safety.
Assign different jobs to attacking pieces
One piece may deliver checks while another controls exits. Avoid moving the supporting piece merely because it can also give check. If it leaves an escape square unguarded, the whole construction may fail.
Look for a quiet move that improves coverage, but test counterchecks and exchanges carefully before choosing it. A mating threat that takes another move to execute gives the defender time to make their own threat. The urgency of the position determines whether net-building is possible.
Prove mate against the best escape
For each candidate check, enumerate legal king moves, captures of the checking piece and possible blocks when the checking line allows them. Calculate the most promising defensive branch first. One surviving exit refutes a claimed forced mate.
If no mate is forced, consider whether the attack wins material or produces a safer ending. Avoid treating that as failure. A sound attack can end with a favourable exchange; forcing a nonexistent mate may throw away the actual advantage you earned.
Know when the king chase has no forced finish
When the king escapes your first attempt, resist adding checks indefinitely. Return to the position before the chase and ask which route was insufficiently controlled. You may need another attacker, an exchange of a defender or a different target. Sometimes no forced mate exists. Writing that conclusion is productive analysis. It prevents sacrificing more material merely because the initial attack looked promising and you feel committed to finishing it. Compare a safe transition to material gain with the speculative continuation before choosing which result to pursue.
Assign each attacker an escape-control role
Choose five attacking positions. Before calculating a checking line, write an escape map and label which attacking piece controls each usable square. Then identify the defender's best exchange of an attacker.
After solving, remove one supporting piece in your imagination and explain which escape appears. Do not analyse this altered position as a legal game continuation; use it only as a role-identification exercise. Finish by describing whether the original line forces mate or merely gains a concrete advantage.
Put the practice into a routine
Where Brass Pawn fits
Brass Pawn's tactical exercises and local analysis can test mating lines. Use the board to confirm every legal defensive option, and distinguish a forced mate from an engine advantage. The app is a trainer, not a guarantee that a king attack must succeed.