if (phase >= 224) { // endgame?
                  int scores[] = { 20, 10, 5, 0, 0, 5, 10, 20 };

                  libchess::Square kw = pos.king_square(libchess::constants::WHITE);
                  libchess::Square kb = pos.king_square(libchess::constants::BLACK);
                  score += scores[kb.rank()] * parameters.tune_edge_black_rank.value();
                  score += scores[kb.file()] * parameters.tune_edge_black_file.value();

                  score -= scores[kw.rank()] * parameters.tune_edge_white_rank.value();
                  score -= scores[kw.file()] * parameters.tune_edge_white_file.value();
          }