I forgot about about these.
Here are the solutions.
White to play (does 1.Ng6 work?)
Usually when one see notes like this (does 1.Ng6 work?) added
to a tactical puzzle the answer is always no.
And here is no exception though it does look tempting
and in Simagin - Beilin
Russia 1946, White was tempted.
(2) Smyslov - Airapetov
Remember no moving the bits about like a C.C. game.
All in the head sitting on the hands.
This was a hard one. Loads of good choices.
I never got this correct though my choice
the brutal 1.Rxd8 Rxd8 2.Rxg7+ does lead to a winning position.
(Black does not take Rook but plays 2...Kh8 it's still a game).
1.Rxg7+ Kxg7 2.Rxd8 Ke8 is also winning but not smooth.
The Queen sac 1.Qxe7 looks juicy but after staring at
it for ages I could not see the follow up.
(By then I had made up mind that 1.Rxd8 was the way.)
White to play. Calcualtion, vision and counting.
Win both the Bishop and Knight in 9 white moves.
A study by E.Pogosiants
Black to play.
Common situation - level heavy bits one side has an exposed King.
The kind of position you could see coming and head for as Black.
Now dig in and finish it.
Possible the most instructive of the lot.
Enjoyable once you see mating nets.