fix : improve brilliant move classification

src/lib/chess.ts

@@ -197,9 +197,14 @@ export const getIsPieceSacrifice = (
   }
   let nonCapturingMovesTemp = 1;
 
+  const capturedPieces: { w: PieceSymbol[]; b: PieceSymbol[] } = {
+    w: [],
+    b: [],
+  };
   for (const move of moves) {
     const fullMove = game.move(uciMoveParams(move));
     if (fullMove.captured) {
+      capturedPieces[fullMove.color].push(fullMove.captured);
       nonCapturingMovesTemp = 1;
     } else {
       nonCapturingMovesTemp--;
@@ -207,6 +212,19 @@ export const getIsPieceSacrifice = (
     }
   }
 
+  for (const p of capturedPieces["w"].slice(0)) {
+    if (capturedPieces["b"].includes(p)) {
+      capturedPieces["b"].splice(capturedPieces["b"].indexOf(p), 1);
+      capturedPieces["w"].splice(capturedPieces["w"].indexOf(p), 1);
+    }
+  }
+
+  if (
+    Math.abs(capturedPieces["w"].length - capturedPieces["b"].length) <= 1 &&
+    capturedPieces["w"].concat(capturedPieces["b"]).every((p) => p === "p")
+    return false;
+  }
+
   const endingMaterialDifference = getMaterialDifference(game.fen());
 
   const materialDiff = endingMaterialDifference - startingMaterialDifference;

src/lib/engine/helpers/moveClassification.ts

@@ -153,8 +153,9 @@ const isBrilliantMove = (
       lastPositionAlternativeLineWinPercentage,
       isWhiteMove
     )
-  )
+  ) {
     return false;
+  }
 
   return true;
 };
@@ -165,8 +166,8 @@ const isLosingOrAlternateCompletelyWinning = (
   isWhiteMove: boolean
 ): boolean => {
   const isLosing = isWhiteMove
-    ? positionWinPercentage < 45
+    ? positionWinPercentage < 50
-    : positionWinPercentage > 55;
+    : positionWinPercentage > 50;
   const isAlternateCompletelyWinning = isWhiteMove
     ? lastPositionAlternativeLineWinPercentage > 97
     : lastPositionAlternativeLineWinPercentage < 3;
@@ -202,8 +203,9 @@ const isGreatMove = (
       lastPositionAlternativeLineWinPercentage,
       isWhiteMove
     )
-  )
+  ) {
     return false;
+  }
 
   const hasChangedGameOutcome = getHasChangedGameOutcome(
     lastPositionWinPercentage,