feat : great & brilliant v1

src/lib/chess.ts

@@ -130,19 +130,25 @@ export const getIsPieceSacrifice = (
   playedMove: string,
   bestLinePvToPlay: string[]
 ): boolean => {
-  if (playedMove.slice(2, 4) !== bestLinePvToPlay[0].slice(2, 4)) return false;
+  const exchangeSquare = playedMove.slice(2, 4);
+  if (bestLinePvToPlay[0].slice(2, 4) !== exchangeSquare) return false;
 
   const game = new Chess(fen);
   const whiteToPlay = game.turn() === "w";
   const startingMaterialDifference = getMaterialDifference(fen);
+
   game.move(uciMoveParams(playedMove));
-  game.move(uciMoveParams(bestLinePvToPlay[0]));
+  for (const move of bestLinePvToPlay) {
+    if (move.slice(2, 4) !== exchangeSquare) break;
+    game.move(uciMoveParams(move));
+  }
+
   const endingMaterialDifference = getMaterialDifference(game.fen());
 
   const materialDiff = endingMaterialDifference - startingMaterialDifference;
   const materialDiffPlayerRelative = whiteToPlay ? materialDiff : -materialDiff;
 
-  return materialDiffPlayerRelative < 0;
+  return materialDiffPlayerRelative < -1;
 };
 
 export const getMaterialDifference = (fen: string): number => {

src/lib/engine/helpers/moveClassification.ts

@@ -47,11 +47,13 @@ export const getMovesClassification = (
 
     if (
       isBrilliantMove(
+        lastPositionWinPercentage,
         positionWinPercentage,
         isWhiteMove,
         playedMove,
         bestLinePvToPlay,
-        fens[index - 1]
+        fens[index - 1],
+        lastPositionAlternativeLineWinPercentage
       )
     ) {
       return {
@@ -117,26 +119,34 @@ const getMoveBasicClassification = (
 };
 
 const isBrilliantMove = (
+  lastPositionWinPercentage: number,
   positionWinPercentage: number,
   isWhiteMove: boolean,
   playedMove: string,
   bestLinePvToPlay: string[],
-  fen: string
+  fen: string,
+  lastPositionAlternativeLineWinPercentage: number | undefined
 ): boolean => {
+  if (!lastPositionAlternativeLineWinPercentage) return false;
+
+  const winPercentageDiff =
+    (positionWinPercentage - lastPositionWinPercentage) *
+    (isWhiteMove ? 1 : -1);
+  if (winPercentageDiff < -2) return false;
+
   const isPieceSacrifice = getIsPieceSacrifice(
     fen,
     playedMove,
     bestLinePvToPlay
   );
-
   if (!isPieceSacrifice) return false;
 
   const isNotLosing = isWhiteMove
-    ? positionWinPercentage > 50
+    ? positionWinPercentage >= 50
-    : positionWinPercentage < 50;
+    : positionWinPercentage <= 50;
   const isAlternateCompletelyWinning = isWhiteMove
-    ? positionWinPercentage > 70
+    ? lastPositionAlternativeLineWinPercentage > 70
-    : positionWinPercentage < 30;
+    : lastPositionAlternativeLineWinPercentage < 30;
 
   return isNotLosing && !isAlternateCompletelyWinning;
 };
@@ -152,7 +162,6 @@ const isGreatMove = (
   const winPercentageDiff =
     (positionWinPercentage - lastPositionWinPercentage) *
     (isWhiteMove ? 1 : -1);
-
   if (winPercentageDiff < -2) return false;
 
   const hasChangedGameOutcome = getHasChangedGameOutcome(
@@ -167,7 +176,7 @@ const isGreatMove = (
     isWhiteMove
   );
 
-  return hasChangedGameOutcome && isTheOnlyGoodMove;
+  return hasChangedGameOutcome || isTheOnlyGoodMove;
 };
 
 const getHasChangedGameOutcome = (

src/lib/lichess.ts

@@ -36,23 +36,12 @@ export const getLichessEval = async (
     }));
 
     lines.sort(sortLines);
+    const isWhiteToPlay = fen.split(" ")[1] === "w";
+    if (!isWhiteToPlay) lines.reverse();
 
     const bestMove = lines[0].pv[0];
     const linesToKeep = lines.slice(0, multiPv);
 
-    const isWhiteToPlay = fen.split(" ")[1] === "w";
-
-    if (!isWhiteToPlay) {
-      return {
-        bestMove,
-        lines: linesToKeep.map((line) => ({
-          ...line,
-          cp: line.cp ? -line.cp : line.cp,
-          mate: line.mate ? -line.mate : line.mate,
-        })),
-      };
-    }
-
     return {
       bestMove,
       lines: linesToKeep,

src/sections/analysis/board/squareRenderer.tsx

@@ -60,7 +60,7 @@ export default SquareRenderer;
 export const moveClassificationColors: Record<MoveClassification, string> = {
   [MoveClassification.Book]: "#d5a47d",
   [MoveClassification.Brilliant]: "#26c2a3",
-  [MoveClassification.Great]: "#749bbf",
+  [MoveClassification.Great]: "#4099ed",
   [MoveClassification.Best]: "#3aab18",
   [MoveClassification.Excellent]: "#3aab18",
   [MoveClassification.Good]: "#81b64c",