Queen and Pawn vs Queen

Queen and pawn versus queen is the ending that decides most deep pawn races, and it is played almost entirely by the DEFENDING queen: an endless spray of checks that the winning side must dry up before the pawn can promote. Where those checks run out is a matter of mappable geography.

The defender's map. Perpetual check zones depend on the pawn's file and the defending king's address. Rook pawns and knight pawns leave the biggest drawing zones; center and bishop pawns the smallest. Here the defending king sits in the far corner, the worst possible geography for him: his queen checks alone, with no second piece to renew the net when the first wave is spent.

The attacker's three tools. Centralization first: a dominant queen intersects the checking lines before they start. The king walk second: paradoxically, the winning king often marches TOWARD the enemy king, because proximity turns defensive checks into check-and-trade replies. And the cross-check third, the signature move of all queen endings: interpose with check, and the defender must either trade queens into a lost pawn ending or abandon the pursuit.

Patience is the technique. Fifty-move-rule pressure is real in this material and lazy repetitions burn the clock that matters. Every sequence should either advance the king's shelter-hunt or improve the queen's grip; the tablebase defense in this drill punishes empty checks of your own harder than anything else.