Develop every move
Opening · tier 2
While pieces are still at home, every move should bring one out.
In the next game: In the opening, play only moves that develop a piece, open a line for one, or castle.
Scorecard habit
Development and castling: a new piece every move, king safe by move 10
On your Scorecard this row is called Develop and castle — a new piece every move, king safe by 10. It grades 2 principles, each on the positions where it actually applied, and reads as tests passed out of tests taken.
Why accuracy misses this
Accuracy is one number: how often you matched the engine. It cannot tell you the pattern behind the misses. This row names the habit — Develop and castle — and only counts a miss when Stockfish’s own line shows the principled move was better and yours cost you winning chances.
The principles
Castle on time
Opening · tier 1
Get the king out of the centre by move 10.
In the next game: Castle as soon as the pieces between king and rook are out — before you start anything else.
Frequently asked questions
While pieces are still at home, every move should bring one out. In the opening, play only moves that develop a piece, open a line for one, or castle.
Get the king out of the centre by move 10. Castle as soon as the pieces between king and rook are out — before you start anything else.
The board defines the opportunity — a position where the principle applies — and Stockfish is the referee: a miss is counted only when the engine’s own line at that move embodies the principle and your move cost you winning chances, so the row never blames you for a rule the position did not ask for. The row reads as tests passed out of tests taken.
See how your own games score on this habit — every analyzed game ends with its Scorecard, free, no account.
Analyze your games free