Tune eval values (#415)

Tune eval values without taking into account king shield bonus and bishop and queen mobility bonus
lynx-chess · Sep 26, 2023 · a5ddce7 · a5ddce7
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Showing 5 changed files with 187 additions and 176 deletions.
diff --git a/src/Lynx.Cli/appsettings.json b/src/Lynx.Cli/appsettings.json
@@ -30,81 +30,84 @@
  "NMP_DepthReduction": 3,
  "AspirationWindowAlpha": 50,
  "AspirationWindowBeta": 50,
+
  // Evaluation
+ "DoubledPawnPenalty": {
+ "MG": -3,
+ "EG": -10
+ },
  "IsolatedPawnPenalty": {
- "MG": 10,
- "EG": 10
+ "MG": -14,
+ "EG": -9
  },
- "DoubledPawnPenalty": {
- "MG": 10,
- "EG": 10
+ "OpenFileRookBonus": {
+ "MG": 45,
+ "EG": 19
+ },
+ "SemiOpenFileRookBonus": {
+ "MG": 20,
+ "EG": 16
+ },
+ "BishopMobilityBonus": {
+ "MG": 1,
+ "EG": 1
+ },
+ "QueenMobilityBonus": {
+ "MG": 1,
+ "EG": 1
+ },
+ "SemiOpenFileKingPenalty": {
+ "MG": -31,
+ "EG": 20
+ },
+ "OpenFileKingPenalty": {
+ "MG": -82,
+ "EG": 5
+ },
+ "KingShieldBonus": {
+ "MG": 5,
+ "EG": 5
+ },
+ "BishopPairBonus": {
+ "MG": 26,
+ "EG": 63
  },
  "PassedPawnBonus": {
  "Rank0": {
  "MG": 0,
  "EG": 0
  },
  "Rank1": {
- "MG": 10,
- "EG": 10
+ "MG": 0,
+ "EG": 5
  },
  "Rank2": {
- "MG": 30,
- "EG": 30
+ "MG": -10,
+ "EG": 9
  },
  "Rank3": {
- "MG": 50,
- "EG": 50
+ "MG": -12,
+ "EG": 30
  },
  "Rank4": {
- "MG": 75,
- "EG": 75
+ "MG": 16,
+ "EG": 58
  },
  "Rank5": {
- "MG": 100,
- "EG": 100
+ "MG": 44,
+ "EG": 127
  },
  "Rank6": {
- "MG": 150,
- "EG": 150
+ "MG": 50,
+ "EG": 190
  },
  "Rank7": {
  "MG": 200,
  "EG": 200
  }
  },
- "SemiOpenFileRookBonus": {
- "MG": 10,
- "EG": 10
- },
- "OpenFileRookBonus": {
- "MG": 15,
- "EG": 15
- },
- "SemiOpenFileKingPenalty": {
- "MG": 10,
- "EG": 10
- },
- "OpenFileKingPenalty": {
- "MG": 15,
- "EG": 15
- },
- "KingShieldBonus": {
- "MG": 5,
- "EG": 5
- },
- "BishopMobilityBonus": {
- "MG": 1,
- "EG": 1
- },
- "QueenMobilityBonus": {
- "MG": 1,
- "EG": 1
- },
- "BishopPairBonus": {
- "MG": 0,
- "EG": 100
- },
+ // End of evaluation
+
  "TranspositionTableEnabled": true,
  "TranspositionTableSize": "256",
  "UseOnlineTablebaseInRootPositions": false,

diff --git a/src/Lynx/Configuration.cs b/src/Lynx/Configuration.cs
@@ -243,27 +243,35 @@ public sealed class EngineSettings
 
  #region Evaluation
 
- public TaperedEvaluationTerm IsolatedPawnPenalty { get; set; } = new(10, 10);
+ public TaperedEvaluationTerm DoubledPawnPenalty { get; set; } = new(-3, -10);
 
- public TaperedEvaluationTerm DoubledPawnPenalty { get; set; } = new(10, 10);
+ public TaperedEvaluationTerm IsolatedPawnPenalty { get; set; } = new(-14, -9);
 
- public TaperedEvaluationTermByRank PassedPawnBonus { get; set; } = new(new(0), new(10), new(30), new(50), new(75), new(100), new(150), new TaperedEvaluationTerm(200));
+ public TaperedEvaluationTerm OpenFileRookBonus { get; set; } = new(45, 19);
 
- public TaperedEvaluationTerm SemiOpenFileRookBonus { get; set; } = new(10, 10);
+ public TaperedEvaluationTerm SemiOpenFileRookBonus { get; set; } = new(20, 16);
 
- public TaperedEvaluationTerm OpenFileRookBonus { get; set; } = new(15, 15);
+ public TaperedEvaluationTerm BishopMobilityBonus { get; set; } = new(1, 1);
 
- public TaperedEvaluationTerm SemiOpenFileKingPenalty { get; set; } = new(10, 10);
+ public TaperedEvaluationTerm QueenMobilityBonus { get; set; } = new(1, 1);
 
- public TaperedEvaluationTerm OpenFileKingPenalty { get; set; } = new(15, 15);
+ public TaperedEvaluationTerm SemiOpenFileKingPenalty { get; set; } = new(-31, 20);
 
- public TaperedEvaluationTerm KingShieldBonus { get; set; } = new(5, 5);
+ public TaperedEvaluationTerm OpenFileKingPenalty { get; set; } = new(-82, 5);
 
- public TaperedEvaluationTerm BishopMobilityBonus { get; set; } = new(1, 1);
-
- public TaperedEvaluationTerm QueenMobilityBonus { get; set; } = new(1, 1);
+ public TaperedEvaluationTerm KingShieldBonus { get; set; } = new(5, 5);
 
- public TaperedEvaluationTerm BishopPairBonus { get; set; } = new(0, 100);
+ public TaperedEvaluationTerm BishopPairBonus { get; set; } = new(26, 63);
+
+ public TaperedEvaluationTermByRank PassedPawnBonus { get; set; } = new(
+ new(0),
+ new(0, 5),
+ new(-10, 9),
+ new(-12, 30),
+ new(16, 58),
+ new(44, 127),
+ new(50, 190),
+ new(200));
 
  #endregion