- day 1: Improvement from 1 to 4 mates/minute (doing several hundreds exercises)
- day 2-10: Plateauing at 4 mates per minute (doing several hundreds exercises per day)
- day 11-14: Switch to FAC. Improvement from 12 to 15 mates per minute at FAC.
- day 15: Switch to M1-h again. Improvement to 7 mates per minute.
If we look at day 1 as adaptation to the exercise and the board, we might decide to ignore the improvement made that day. In that case we might say that the improvement at M1-h is solely due to doing FAC. It is too premature to draw any definite conclusions already of course, but the facts are intriguing.
This is a comment made by Anon this day:
I started with M1-h first (because back then M1-e was not available). It was pretty difficult, and not much fun, either.
Then (when it became available) I did M1-e for a while. I could improve ~20% in speed here. Then I tried M1-h - and I scored much better here then, too. Without having trained M1-h. So there was an obvious transfer from M1-e to M1-h.
The speed improvement in M1-h was about twice as fast (~100%!), but this is mainly because the numbers are so low.
Initially I solved about 3-4 M1-h per minute, and when I came back after the M1-e training, then I managed about 5-9 M1-h per minute.
Aox is right - if we cant improve at M1... it might not be worth to do any tactics other at all. Though my impression is, that a 20% speed gain in M1-e can cause a much better result in M1-h. So the impression that a 20% gain is not so much is maybe underestimating the transfer to more difficult tasks.
The story of Anon has some striking similarities with my own story. Although he did M1-e while I did FAC. So what has happened? Have a look at the following position:
|White to M1-h|
This is typical M1-h position with a lot of temptations. These are the checks in this position:
- Black king walking away
- Check giving piece can be captured
- Check can be blocked by a black piece
The conclusion of this all is:
Training the subtask FAC improves my speed of the main task M1-h, but not necessarily by seeing the checks faster. Apparently I don't check all checks when doing M1-h, since the time to check all checks is greater than the time to solve the M1-h as a whole by a few times. That leads to the question: what subtask do M1-h and FAC have in common, but is trained better by doing FAC?
If I add the story of Anon:
What subtask do M1-h, M1-e and FAC have in common, but is trained better by doing FAC or M1-e?