Grandmaster Preparation Calculation Pgn New Now

The following game illustrates a Grandmaster’s calculation at the decisive moment. White sees a seemingly winning check, but calculates three candidate moves, finds a refutation to the obvious one, and chooses a deep intermediate move.

[Event "GM Preparation Example"]
[Site "Training"]
[Date "2025.01.15"]
[Round "?"]
[White "Grandmaster (2700)"]
[Black "Opponent (2600)"]
[Result "1-0"]
[ECO "B90"]
[PlyCount "45"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Be7 9. Qd2 O-O 10. O-O-O Nbd7 11. g4 b5 12. g5 Nh5 13. Kb1 Rb8 14. Nd5 Bxd5 15. exd5 Nb6 16. Na5 Nxd5 17. Nc6 Qc7 18. Nxe7+ Nxe7 19. Qxd5 Nf5? 

(Diagram: Black has just played 19...Nf5, attacking the Be3 and threatening ...Nxe3 with tempo.)

Position after 19...Nf5

At first glance, White has a discovered check possibility. But a GM calculates three candidate moves:

Grandmaster Calculation:

20. Rhg1 Nxe3 21. Qxb7 Rfc8 22. g6! hxg6

(If 22...fxg6 23. Rxg6+ hxg6 24. Qxg6#)

23. Rxg6+ fxg6 24. Qxg6#

1-0

The most valuable PGNs are often generated from a player's own games. A GM does not just look at the critical moment where the game was decided. They create a training file where they enter their thought process during the game.

You do not need a super-GM's library. You can build your own "new" calculation PGNs using free tools.

Software Required: Lichess.org (Analysis Board), Scid vs. PC (free), or a text editor. grandmaster preparation calculation pgn new

Step 1: Extract a Critical Moment Take a recent master game (e.g., from the 2024 Candidates Tournament). Stop at the move where one player spent >15 minutes thinking.

Step 2: Write the FEN and a Prompt

[FEN "your_fen_here"]
% Prompt: "White to play. You calculated 3 candidate moves: Rfd1, b4, or Kh1. Calculate each for 5 moves. Which is best?"

Step 3: Insert Virtual Branches Use parentheses ( ) to indicate alternative lines, but preface them with a time limit.

Step 4: Add Reflection Comments After the calculated line, add a % comment explaining why a move works positionally, not just tactically.

Step 5: Export as .pgn Save the file. Import it into a study tool. Set the tool to "Hide Next Moves" (Lichess Study feature). (Diagram: Black has just played 19

Don’t calculate longer — calculate smarter.

Take one of your sharp opening lines, find a position 6–8 moves in, and prepare it like a GM:

Want me to turn your opening position into a GM-style calculation PGN? Post the FEN or move list.

Modern engines (NNUE style) often suggest counter-intuitive moves, such as sacrificing a pawn for a blockade or trading a bishop for a knight to create a specific pawn structure.