diff --git a/rank_progress.py b/rank_progress.py
new file mode 100644
--- /dev/null
+++ b/rank_progress.py
@@ -0,0 +1,54 @@
+import sys
+import re
+from itertools import groupby
+from datetime import datetime
+import argparse
+
+parser = argparse.ArgumentParser()
+parser.add_argument("since")
+parser.add_argument("to", default=None)
+parser.add_argument("-c", "--country-code", default="CZ")
+
+args = parser.parse_args()
+
+
+def parse_record(record):
+	types = [int, str, str, str, str, str, int, int, int, int]
+	columns = [f(token) for (f, token) in zip(types, record)] + [datetime.strptime(record[5][1:7], "%y%m%d")]
+	return tuple(columns)
+
+
+def round_rating(r):
+	return (r+50)//100*100
+
+
+since = datetime.strptime(args.since, "%Y%m%d")
+to = datetime.strptime(args.to, "%Y%m%d") if args.to else datetime.now()
+
+with open("/tmp/all.hst") as f:
+	s = f.read()
+
+records = [re.split(r" {2,}", line.strip()) for line in s.splitlines()]
+records = filter(lambda rec: len(rec) == 10, records)
+records = map(parse_record, records)
+national_records = filter(lambda rec: rec[2] == args.country_code, records)
+players = groupby(national_records, lambda rec: rec[0])
+
+for (pin, recs) in players:
+	tourneys = list(recs)
+	rounded_rating = round_rating(tourneys[0][9])
+
+	steps = []
+
+	for r in tourneys:
+		if rounded_rating != round_rating(r[8]):
+			rounded_rating = round_rating(r[8])
+
+		if r[9]-rounded_rating >= 50 or rounded_rating-r[9] > 100:
+			steps.append(r)
+			rounded_rating = round_rating(r[9])
+
+	steps = [r for r in steps if since <= r[10] <= to]
+	if steps:
+		print(steps)
+