Basic checkmates every player should know

The most common winning endgame. The method is to use the queen to box the enemy king toward an edge, keeping a knight’s-move distance so you never stalemate, then bring your own king up to support the final mate. The single biggest beginner mistake here is stalemate - giving the lone king no legal move while it is not in check - so always check the king still has a square until the moment of mate.

Here is the reliable method as a sequence. First, place your queen a knight’s-move away from the enemy king. From there, mirror the king: every time it moves, move your queen to stay a knight’s-move away. This "knight-move box" walks the king to the edge of the board without ever stalemating it, because the king always keeps at least one free square.

Once the king is stuck on the edge, stop moving the queen and march your own king up to stand two squares away, directly opposing it. Now deliver mate with the queen on the edge rank or file, with your king guarding the escape squares. The whole technique is: box with the queen, walk the king to the rail, bring your king up, then mate - and check for a free square before every queen move so you never give stalemate.

Harder than the queen because the rook cannot control squares alone - your king must do half the work. You use the two kings in opposition and the rook to cut the enemy king off along a rank or file, shrinking its box one line at a time until it is mated on the edge. Learning this teaches the "king and heavy piece" method that underlies most basic mates.

Two rooks vs king is the easiest of all: the "lawnmower" or "ladder" mate walks the king to the edge with the rooks cutting off successive ranks, no king help needed. The back-rank mate is the one you will actually deliver most in real games - a rook or queen mates a castled king trapped behind its own unmoved pawns. Recognising it both ways (delivering it, and not falling for it) wins and saves countless games.

Reading the method is not the same as executing it under no time to think. Audit Chess Practice gives you these mates as positions to play out against the engine: you are set the goal of delivering mate and you keep going until you get it right, so the technique becomes automatic. It is free, needs no account, and runs in your browser, with tactics and essential endgames in the same set.