Got number 3!! its like number two just u pick up the knight and dont move it.
Checkmate in zero and half a move.
Sort:
There is a class of chess puzzles called retro analysis I think. This type of puzzle might appeal to the readers of this topic.
I recall one which has the black king and rook on their normal start squares, with f,g,h pawns on their respective start squares. the white king is castled I think but I forget the disposition of the white rook, it may be on a1. does anyone know this puzzle? It is white to move and mate I think.
1# does no one else care that moving the pawn on b2 to b3 is mate, and since in hess notation a pawn Move doesn't have a letter to represent the pawn couldn't that be the answer?
Problem 2: the king lifts off and moves to g6, but doesn't land; hence the "half-move" is legal, since the white king doesn't end up attacked, but it attacks all the squares around the black king, including the king's position, so it is "mate".
But, I think, "half-a-move" should be better defined. 
---
Or finish the move h8=Q by placing the queen in the corner!
chess_eli_hancock wrote:
1# does no one else care that moving the pawn on b2 to b3 is mate, and since in hess notation a pawn Move doesn't have a letter to represent the pawn couldn't that be the answer?
1.b3+? Kb4!
1. flip board
2. lift king and hover it on g file
3. lift knight and hover it on the same space
rodrigoalvarosanto wrote:
1. flip board
2. lift king and hover it on g file
3. lift knight and hover it on the same space
No 2 is correctly posted earlier. White finishes the promotion on h8 by placing a queen there!
The solution to no. 1 is indeed the board flip but only after one has established that the position would be illegal with the normal direction of play!
Dec 25, 2023
0
#31
The more correct answer for the third one - you could technically use the same tactic as the other problem and place a queen on G8, a finishing of fxg8=Q. I do not like the answer of "You lift the knight," because in that logic, Black has the move of lifting the king as well. Too bad! There's no check anymore.
With captures, it becomes even more complicated. Worth doing a complete analysis of different types of moves.
One thing is clear, mate only happens after a move is completed. So the floating knight solution to #3 remains firmly in the realms of jokedom.