By the time every player has castled and most pieces are exchanged, the word 'endgame' starts doing a lot of work in chess writing. Technically it is the moment after the queens come off. Psychologically it is the moment most players stop caring about the clock and start hoping the opponent makes a mistake, because nobody told them that the king is supposed to walk forward now.

Your king is a piece now

In the opening and middlegame, the king hides. In the endgame, the king marches. This is the single adjustment that raises most ratings by 200 points. There is no safer square for the king in the endgame than the center, three squares away from enemy pawns. If you are in a king-and-pawn endgame and your king is still on the edge, you are already losing ground.

Basic checkmates you need

You cannot claim to know chess without demonstrating two: king and queen versus king, and king and rook versus king. Both follow the same idea: bring your king and the mating piece together, and herd the enemy king toward the edge. The queen and rook do not need to deliver mate by force — they just need to take away one rank or file at a time until the enemy king runs out of room. Learn these by muscle memory, because they are the tax you pay for reaching a winning endgame.

The square rule

A pawn that reaches the 7th rank promotes. The question is whether the defending king can catch it. The square rule skips the calculation: draw a square from the pawn to its promotion square. If the enemy king can step into that square in time, it can catch the pawn. If not, the pawn promotes. It is not a perfect rule, but it is right often enough to trust under time pressure.

Rook endgames and the seven-card trick

Most rook endgames are decided by two things: who controls the 7th rank (with the rook on it), and who can activate the king. The classic trick is the rook on the 7th rank behind a passed pawn, cutting the defending king off from both the pawn and the action. A rook that oscillates between the 3rd and 7th ranks keeps the enemy king guessing. In rook endgames, being passive loses. There is almost always one active try, and if you do not find it, your opponent will.

Opposition and key squares

In king-and-pawn endgames, the opposition is the one idea everyone remembers but half the players use correctly. When the kings face each other with one square between them and it is your move, you have the opposition — you want it because it lets you approach the enemy pawns without letting the enemy king escort its own. Key squares (the square two ahead of the pawn on a file) work with the opposition: if your king reaches a key square, the pawn is going to promote, period.

Your training plan for this week

Endgames are small positions. Solve them like this:

1. Teach your king to walk — play king moves in every pawn endgame you can.
2. Memorize K+Q vs K and K+R vs K, including the mating net.
3. In every rook endgame, ask: who is on the 7th rank, and who can check the king?
4. Only then calculate the pawn races instead of guessing.

If your opponent offers a queen trade on move 25 and you see it is a dead-drawn pawn ending, take the trade. If you see a king-and-pawn mess that favors the active king, decline it and keep the queens on. The endgame begins when you decide it does, not when the board says it does.