See comments to this problem in the award: https://www.jurajlorinc.com/chess/ann10tt.htm
There is no definition of shadow piece. How and when is it nominated? What are its abilities?
It is pinned - see definition below in separate post. The idea of unpin is not to move the pinned…
The promised definition attempt. The pin. The piece is pinned if on its removal from the board the king of…
Correction to p.4. White second move is not unpin, but black Bc6 is.
I am currently trying to create a reasonable definition of pin/unpin. I need more time to prepare the text, but…
The question was: Is black d4-d3 unpin?
To Diagram C. Is the following rendering (scheme) thematic? White bishop is immobile initially, but receives the legal move while…
May be compared to WinChloe 167635. (Not an anticipation.)
The idea of Michal still seems to work (in a mirrored way): 1...Kc1(+Rd1) 2.I~ Re1+ 3.Ixe1(=K) Qf3 4.Bf2 Qd1#