Itte Dojo
一手道場

One-minute rank checkFive puzzles, about a minute

Five endgame puzzles of rising difficulty, 30 seconds and one move each. From how many you get right and how fast, you get a rank estimate and a title.

Your record

How it works

  • 5 puzzles of rising difficulty, from fewer empty squares to more. A new set is picked every time.
  • 30 seconds and one move per puzzle. When time is up, the next puzzle starts.
  • 2 points for a right answer and 1 more if it took 10 seconds or less: 15 points in all.
  • Your record is kept in this browser only. Your answers and result (the rank level and the number of right answers) go into the site's usage statistics as anonymous counts. Your puzzle progress and rank exam record do not change.

About the rank check

The rank check picks one puzzle from each of five levels of the 65 endgame puzzles, by empty squares: 10, 11, 12, 13 and 14–15. The engine has read every one of them to the end (exact search) and checked that exactly one move avoids losing (it wins or draws).

Points and ranks

A right answer is worth 2 points, and 1 more if it took 10 seconds or less, so 5 puzzles make 15 points. Two thirds of your points, rounded, places you on the eleven ranks from 10 kyu (0) to 5 dan (10). All right and fast is 5 dan level; all right but slow is about 2 dan. 5 dan level needs every answer right: miss one and it stops at 4 dan.

Titles and remarks

Your title comes from the theme most common in the puzzles you got right (corners, parity, openness, mobility or reading), and the remark from the theme most common in the ones you missed. If time ran out on half or more, the remark says so.

The check is only an estimate. For your real rank, play a full game in the rank exam. Any puzzle you missed can be tried again on its own page, with the explanation.