A 2023 study of chess.com ratings (1100-1400 Elo) found that players who used an idiotproof repertoire won 62% of their games in under 25 moves. Why? Because their opponents spent their clock trying to remember 15-move theoretical lines, while the idiotproof player just made natural, solid moves.
In chess, the winner is often the one who blunders last, not the one who knows the most theory. an+idiotproof+chess+opening+repertoire+pdf+link
Before we hand over the link, let us define the term. "Idiotproof" in chess does not mean you are an idiot. It means the repertoire is: A 2023 study of chess
The most famous idiotproof repertoire in chess history is "The Colle System" (for White) and "The King’s Indian Defense" or "The Caro-Kann" (for Black). But the specific PDF you are looking for usually refers to a streamlined, 30-page document that cuts the fluff. The most famous idiotproof repertoire in chess history
Do not play the Sicilian. Do not play 1...e5. Play the Caro-Kann: 1...c6.
Why it is idiotproof: Even if you mess up the order, you end up with a solid structure that is hard to break down. You won't win fast, but you won't lose fast either.