Training notebook · Endgames
Distant opposition: plan the approach, not just the spacing
Distant opposition connects far-apart kings to a future entry square. Learn to check the approach and spare pawn moves before relying on parity.
Distance must serve an entry
Kings separated by more than a single square can still influence who yields when they approach. Distant opposition is a way to reason about that future meeting. It is useful only when the meeting concerns a square worth reaching or holding; parity alone is not a winning condition.
Start by identifying the zone of conflict: a pawn, an entry file or a route to a promotion square. Mark which squares each king must preserve. Then trace an approach that keeps the relevant relationship instead of assuming that a straight march will maintain it automatically.
A diagonal step can change the problem
The other king need not walk toward you on the same file. It may shift to a different route, attack a pawn or wait until you commit. Follow those alternatives before declaring that you hold opposition at a distance. The edge of the board can also remove a useful sidestep.
Pawn reserves make a purely visual count unreliable. Either side may be able to change the move order without moving its king. Ask which reserve moves are genuinely safe. A pawn push that permits capture is not a free tempo, and a move that locks the position may change the target rather than simply reverse the turn.
Use a route comparison drill
Choose a legal pawn-ending study with separated kings from a trusted instructional source. Draw two candidate routes for the attacking king and identify the defender's best interception square for each. Calculate until the kings actually meet; do not stop when they look symmetrical at a distance.
Play the position, restart and choose the other route. Record where the two plans diverge and whether a pawn move explains the difference. On the following day, solve from the defender's perspective: choose which king approach you want to prevent and describe the square you are prepared to concede instead.
Self-check for overgeneralisation
You should be able to explain both the useful parity relationship and its limitation in the particular ending. If your explanation contains only an odd or even number of squares, it is missing the actual objective. Add the entry square and the opposing move that threatens to change the route.
Keep one failed distant-opposition attempt in your notes. Identify whether the failure came from a diagonal approach, a reserve pawn move or an irrelevant target. Revisiting a failed plan is often more informative than repeating a successful march in the same diagram, because it tests whether you can recognise when the technique applies.
When testing the approach, compare legal king distance with visual distance. A diagonal route can be as short as a straight one, but attacked squares may force a detour. Draw the actual permitted path before counting its moves; otherwise a neat parity argument can conceal an impossible king journey.
Put the practice into a routine
Where Brass Pawn fits
Brass Pawn provides selected pawn-ending drills, not an exhaustive distant-opposition generator. Study the geometry externally and use the app's available endings to practise disciplined king calculation.