[Demonstration 1]

[Buggy Method]
int evaluateSingleMaterialPosition(int pieceScore, int[][] positionScore, int posX, int posY, boolean isWhite) {
    int singleScore = pieceScore;
    if (isWhite) {
        singleScore += positionScore[posX][posY];
    } else {
        singleScore += positionScore[8 - posX][8 - posY];
    }
    return singleScore;
}

[Buggy Hunk]
singleScore += positionScore[8-posX][8-posY];

[Patch]
singleScore += positionScore[7-posX][7-posY];