Blunderbase

Example review

This is what one moment looks like

An invented position, not anyone’s game. Blunderbase finds the moment in your own completed games, asks what you were thinking, and answers with what the engine can actually prove.

The move that was playedWhat the engine plays instead

What the learner wrote

I wanted to open a line for my light-squared bishop before castling.

Engine-backed explanation

Your idea

Opening that diagonal is a real plan, and it is worth having. It just was not the question the position was asking.

What happened

Black's last move attacked the bishop on b5, and d3 left it there. Black can answer axb5 and win a bishop for nothing.

Stockfish's moves: Ba4, Nf6, O-O

Next time

When a pawn moves next to one of your pieces, ask what it is attacking before you do anything else.

Think back

What was the last move Black made, and what did it touch?