Hansen: Daily Chess Training: Chess Tactics for Improvers Volume 1 metadata-enriched The arising opening schemes are

The arising opening schemes are similar to the King's Indian Defence (see volume 2)

5 Nimzo-Indian: Rubinstein Variation

\''Furchtlose Pia\'' hieß das erste Stück

and what are their credentials

Hansen: Daily Chess Training: Chess Tactics for Improvers Volume 1 metadata-enriched The arising opening schemes are808 tactical puzzles Are you ready to improve your tactical game? It has been said that chess is 99% tactics but whether that is an accurate reflection is hard to tell. Nevertheless, it is important. This is a collection of 808 tactical puzzles from games played in 2019 The puzzles vary in difficulty, some are relatively easy, some are little more difficult, but you will find that all of them are easier and more straight forward than the puzzles found