CHESS ANALYTICS 00.2: Methods, Part 3: How to Read the Output Files

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  1. From Numbers to Interpretation
  2. 1. The Main File Categories
  3. 2. First Rule: Know Whether the Number Is a Mean or a Sum
  4. 3. Second Rule: Separate Faced Difficulty from Caused Difficulty
  5. 4. Third Rule: Higher Does Not Always Mean Better
  6. 5. Fourth Rule: Raw CCP-v2 and Log CCP-v2 Are Different
  7. 6. Reading article_report.md
  8. 7. Reading all_metrics_3source.csv
  9. 8. Reading metric_ratios.csv
  10. 9. Reading player_summary.csv
  11. 10. Reading game_summary_readable.csv
  12. 11. Reading critical_moves.csv
  13. 12. Reading volatility_swings.csv
  14. 13. Reading hardest_positions.csv
  15. 14. Reading difficulty_critical_moves.csv
  16. 15. Reading ccp_hardest_positions.csv
  17. 16. Reading ccp_v2_log_hardest_positions.csv
  18. 17. Reading ccp_v2_log_critical_moves.csv
  19. 18. Reading ccp_v2_root_branch_summary.csv
  20. 19. Reading ccp_v2_root_branch_ply_summary.csv
  21. 20. Reading ccp_v2_root_branch_top_moves.csv
  22. 21. Reading ccp_v2_root_branch_payoff_moves.csv
  23. 22. Reading ccp_v2_root_branch_workload_rows.csv
  24. 23. Difficulty Share
  25. 24. Difficulty Pressure Quality, DPQ
  26. 25. Pressure Yield
  27. 26. Combining the Metrics: Common Interpretation Patterns
  28. 27. Style Profiles the Files Can Reveal
  29. 28. How to Compare Two Matches
  30. 29. A Simple Expert Reading Formula
  31. 30. Final Reading Checklist
  32. 31. The Main Lesson

From Numbers to Interpretation

The first methods article explained the WDL foundation: expected score, expected-score loss, WDL Accuracy, and the main performance metri.

The second methods article introduced the post-WDL difficulty layer: all-legal difficulty, CCP Search Difficulty, CCP-v2 recursive forcing burden, probe/confirm search, root-branch diagnostics, Difficulty Pressure Quality, and Pressure Yield.

This third part explains how to read the actual output files.

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CHESS ANALYTICS 04: Kasparov vs. Karpov matches of 1985, 1986, 1987, 1990, plus comparison from 1970s to 1990s

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CHESS ANALYTICS 03: Karpov vs. Kasparov 1984/85 match

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CHESS ANALYTICS 00.0: List of Other Chess Analytics Articles & Download link

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    more to come

    CHESS ANALYTICS 02: Karpov vs. Korchnoi 1978 + 1981

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    1. 1. CHESS ANALYTICS 02 part 1/2: Karpov 1978 + 1981 vs. Korchnoi
      1. 1.1. Overall verdict
      2. 1.2. The two matches are very different
      3. 1.3. Karpov–Korchnoi 1978: nearly level
      4. 1.4. Karpov–Korchnoi 1981: clear Karpov superiority
      5. 1.5. Game Accuracy and Mutual Accuracy
      6. 1.6. Overall game-by-game edge
      7. 1.7. Which metrics best explain the scores?
      8. 1.8. Metric-family interpretation
      9. 1.9. Chess-style interpretation
      10. 1.10. Final conclusion
    2. 2. CHESS ANALYTICS 02 part 2/2: Karpov 1981 vs. Fischer 1971-72
      1. 2.1. Why Karpov 1981 improves the forecast
      2. 2.2. Why Fischer still retains a small statistical edge
      3. 2.3. The key change: Karpov becomes a much better anti-Fischer candidate
      4. 2.4. Revised estimate
      5. 2.5. Final answer
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    CHESS ANALYTICS 01: Fischer 1971-72 compared with Karpov 1974

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    1. 0. CHESS ANALYTICS 00: Methods: Measuring World-Championship Roads with Stockfish 18 WDL
    2. CHESS ANALYTICS 00.0: List of Other Chess Analytics Articles
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    CHESS ANALYTICS 00.1: Methods, Parts 1 & 2: Measuring World-Championship Roads with Stockfish 18 WDL

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    1. CHESS ANALYTICS 00.2: Methods, Part 3: How to Read the Output Files
    2. CHESS ANALYTICS 00.0: List of Other Chess Analytics Articles
    1. 1. The Basic Units of the Analysis
    2. 2. Expected Score
    3. 3. Expected-Score Loss
    4. 4. WDL Accuracy
    5. 5. Game Accuracy
    6. 6. Mutual Accuracy
    7. 7. Performance Quality
    8. 8. Dominance
    9. 9. Volatility
    10. 10. RMS Expected-Score Loss
    11. 11. Error Concentration
    12. 12. Score, Expected Score, and Conversion
    13. 13. HardRAP and SoftRAP
    14. 14. How the Metrics Form One Whole
    15. 15. Why WDL Is Preferable Here to Pawn Evaluation
    16. 16. Why This Series Is Worth Doing

    2026-06-12, added Part 2:

    1. CHESS ANALYTICS 00.1: Methods, Part 2 — Post-WDL Difficulty Metrics
    2. 1. WDL Metrics: Measuring Lost Scoring Chances
    3. 2. All-Legal Difficulty: How Narrow Was the Position?
    4. 3. Difficulty-Weighted Accuracy: Accuracy Under Pressure
    5. 4. CCP Difficulty: Checks, Captures, and Promotions
    6. 5. CCP-v2: Recursive Forcing-Line Search Difficulty
    7. 6. CCP-v2 Vision: Looking for Quiet Ideas Before Forcing Lines
    8. 7. CCP-v2 Two-Stage Probe/Confirm: Search Cheaply, Then Confirm Seriously
    9. 8. CCP-v2 Root-Branch Diagnostics: What Did the Search Actually Prefer?
    10. 9. CCP-v2 Log-Critical Moves: Where Difficulty Meets Damage
    11. 10. What the Post-WDL Metrics Add
    12. 11. Short Chronological Summary of Analyzer v3.6.1
    13. 12. Practical Reading Guide

    This article series studies World-Championship matches and World-Championship qualification runs with a modern engine-based method.

    The basic idea is simple:

    Put every move of great historical matches under Stockfish 18, translate each position into win/draw/loss chances, and then ask: who preserved winning chances better, who lost chances more often, who created volatility, who converted chances into points, and who stayed more consistent?

    Stockfish 18 is far stronger than any human player. Its strength is so far above human World Champions that comparing it to humans by normal Elo becomes difficult. This makes it useful as a reference point: not because it “understands chess like a human,” but because it gives a very strong, consistent measuring stick.

    The purpose is not to reduce chess greatness to one number. The purpose is to create a performance profile:

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    IMAGINATION ENGINEERING: 21 Foundational Thought Operations

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    Based on the author’s discussion with ChatGPT o1, below is a concise list of some foundational thought/imagination operations we’ve identified so far, each with a short description.

    This list is one possible ordering of these operations, arranged from most foundational (simple transformations on what’s already present) to more complex (involving abstraction, context shifts, and temporal or evidential reasoning). Of course, any such ordering is subjective; different thinkers might sequence them differently based on how they conceptualize “foundational.” Still, this list gives a helpful progression from basic acts to more advanced cognitive maneuvers.


    1. Addition or Subtraction

    • Definition: Including or removing elements or phases from a mental construct.
    • Example: Expanding a story by adding a new character, or simplifying a recipe by cutting out ingredients.

    2. Partitioning or Unifying

    • Definition: Splitting elements or phases into distinct parts, or merging multiple elements or phases into a whole.
    • Example: Breaking a problem into smaller subproblems, or consolidating scattered notes into a single outline.

    3. Enumerating

    • Definition: Systematically listing or mapping out all possible combinations or permutations to ensure none are missed.
    • Example: Pairing {red, blue, green} with {circle, square, triangle} to generate nine distinct design ideas.
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    PHILOSOPHY: Methods of Thinking in Plato’s Dialogues

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    The following are a series of brilliant AI-generated Step-by-Step Guides for Thinking in the same way as Plato, the brilliant philosopher. The AI used was Google’s Gemini 1.5 Pro with NotebookLM, as presented with the five volumes of Benjamin Jowett’s public domain 1871-1875 translations of Plato into English.

    CONTENTS LIST:

    1. Methods of Thinking in Plato’s Dialogues
      1.1. Dialectic
      1.1.1. Dialectic: Definitions
      1.1.2. Dialectic: Division and Generalisation
      1.1.3. Dialectic: Elenchus (Socratic Method)
      1.2. Hypothetical Reasoning
      1.3. Anamnesis (Recollection)
      1.4. Analogy and Illustration
      1.5. Myth and Allegory
      1.6. Irony
    2. Main Subject Matters in Plato’s Dialogues, a List
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