static double chessOCR_scorePieceRecognizer(ChessPieceRecognizer recognizer) {
  ret chessOCR_scorePieceRecognizer(chessOCR_squareImagesCollectorFromAGIBlue(), recognizer);
}
  
static double chessOCR_scorePieceRecognizer(ChessOCR_SquareImagesCollector squareImagesCollector, ChessPieceRecognizer recognizer) {
  LPair<S, BufferedImage> images = squareImagesCollector.allImages();
  try {
    new Scorer scorer;
    for (unpair S piece, BufferedImage img : images) {
      scorer.add(eqic(pairA(recognizer.recognize(img)), piece));
    }
  
    ret scorer.score();
  } catch print e {
    print("RECOGNIZER TOTAL FAIL");
    ret 0;
  }
}

Began life as a copy of #1024760