How to win in chess in 3-5 moves?
Only two combinations fit into this number of moves - a stupid mate in 2 moves and a children's mate in 4 moves. These combinations are well known, while the first of them is achieved only in case of an opponent's mistake - if he begins to expose the kingside with the first two moves, and the second is possible only if the opponent does not know how to defend in this standard situation.
One of the quick mates in chess is called "children's mate" in three moves: 1. e4 2. Bc4 3. Qh5 4. Qxf7. Another quick checkmate from the real game Legal Saint-Brie, played in Paris in 1750 .: 1. e4 e5 2. Bc4 d6 3. Nf3 Nc6 4. Nc3 Bg4 5. Nxe5? C: d1 ?? 6. Bxf7 + Kre7 7. Nd5 mate, which entered chess literature by the name of the discoverer as Mate Legal.
In chess, at will, it is quite difficult to win in 3 - 5 moves (if your opponent will not help you in this).
The shortest known mate is a 2-move checkmate. In this case, Black puts mate. We once called this opening behind White the "Opening of the Coffin": 1. f3 e6 2. g4 Qh4x. Sometimes, for fun, I played the blitz "Coffin opening" - 1. f3. But the second move is 2. Kf2 (according to the theory, at the beginning of the game the king should be protected :)).
A variation on this theme is checkmate in 3 moves (with black). Moreover, checkmate is made with the bishop move: 1.f3 e6 2. Nc3 Ce7 3.g4 Ch4x.
White will not checkmate in less than 3 moves. These are variations on the previous mate in 2 moves. For example: 1.e4 f5 2.ef g5 3.Qh5x.
The well-known children's mate is put in 4 moves: 1. e4 e5 2. Qh5 Nc6 3. Bc4 Ka6 4. Qf7x.
In general, in order to win at the beginning of the game, study the pitfalls in the opening.
And to explore the theoretical possibilities of chess, look at cooperative checkmates (when the other side helps them checkmate).
In practice, there are cases when a player won a game on the 1st move. His opponent just gave up right away (they say, I don't like his face). There were cases when a player was so thoughtful about the first move that he was overdue.
But you never know what happens in chess.