sclass ChessPieceRecognizer {
  LPair<BWImage, S> images;
  
  void load {
    long time = sysNow();
    images = mapPairsA loadBWImage(chessPieceImagesFromAGIBlue());
    done2("Loading " + n2(images, "piece image"), time);
  }
  
  Pair<S, Double> recognize(BWImage img) {
    new Best<S> best;
    for (BWImage pieceImg, S piece : unpair images)
      best.put(piece, bwImageSimilarityResized_ignoreRatioMismatch(img, pieceImg, best.score()));
    ret best.pair();
  }
}