1900 - Beginner To Master | Chess Speedrun

Themes

Each number is a game; it opens the move where he explains the idea. Open a theme to read what it is about.

Ask what the move just allowed
After every move, name what the position now allows that it did not a moment ago.
06 10 12 18 21 22 23
Be obsessed with undefended pieces
Make it a habit to notice every undefended piece, yours and his, and to count the defenders of every piece that is under attack.
01 07 08 11 13 19 20 22 23
Make one move do two jobs
When a task can be done in a way that also does something else, do it that way. Do not tie a piece to one job if another can do it and keep working.
01 03 05 06 10 11 12 14 15 18 19 22 23

A piece is a poor blocker
Block a line with a pawn when you can. A piece standing in the way can be attacked and made to move, and the line opens again.
22

Far ahead, a pawn is currency
When far ahead, a pawn is something to spend, for example on a trade that simplifies. Do not cling to every pawn.
19 21 22

Tactics override verbal logic
General reasoning picks good moves most of the time, but a concrete tactic beats it. Look for pins and loose pieces every move.
02 04 22