| | | All | (%Lan,%Dif) | | | THF | | | TFF | | | FOF | | | CNF | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Easy | | | 5077 | (22%,100%) | | | 855 | (22%,17%) | | | 520 | (25%,10%) | | | 1649 | (19%,32%) | | | 2053 | (25%,40%) |
| Difficult | | | 13619 | (60%,100%) | | | 2346 | (61%,17%) | | | 1182 | (54%, 9%) | | | 5682 | (66%,42%) | | | 4463 | (55%,33%) |
| Unsolved | | | 3990 | (18%,100%) | | | 653 | (17%,17%) | | | 436 | (21%,11%) | | | 1299 | (15%,34%) | | | 1602 | (20%,42%) |