4 ms·
There certainly can be short difficult puzzles, but as I mentioned elsewhere, I think the current 4000-rated puzzles look like outliers and may be removed. +
by drw 6y ago
There certainly can be short difficult puzzles, but as I mentioned elsewhere, I think the current 4000-rated puzzles look like outliers and may be removed.
+----------------+---------+-------------------+
| ratings_band | count | avg_move_count |
|----------------+---------+-------------------|
| ... | | |
| 3000-3099 | 917 | 3.9400 |
| 3100-3199 | 434 | 4.1244 |
| 3200-3299 | 282 | 4.2766 |
| 3300-3399 | 144 | 4.7500 |
| 3400-3499 | 206 | 4.9515 |
| 3500-3599 | 131 | 4.9237 |
| 3600-3699 | 104 | 5.0481 |
| 3700-3799 | 86 | 5.3256 |
| 3800-3899 | 114 | 6.4035 |
| 3900-3999 | 43 | 5.9302 |
| 4000+ | 5 | 1.6000 |
+----------------+---------+-------------------+