Day 284 / 81 to go

Today I did some tactic puzzles using CT-ART 4.0 --- but fell below 2500 (some of the stuff was way over my abilities; maybe, using a board and taking more time I would have achieved more; but on the train using my mobile: no chance).
As indicated before, I limit the difficulty level to the margin 30-130 and I had the engine pick the themes randomly. THIS WAS A MISTAKE - at least according to Smith´s Woodpecker method! From now on I will
decrease the difficulty level to 100
have the puzzles ordered by theme.
This (according to Smith) will assure that I will easier remember/recognise/internalise the themes and motifs!

Then I advanced in Smith´s book. Did you know about this THEORETICALLY DRAWN ending? Black to move:

Actually, I didn´t. But it appears to be rather "straight" forward and something easy to remember...