idk my first guess is bj13, and yeah daily puzzles seem like a good idea
Daily Puzzles? Also find the move that saves the game (Blue to move)
The key idea is to prolong the game (not win), just don't get mated this move.
EDIT: So when I say "save the game" I mean don't get checkmated this move

the only move that stops nk12# is bj13, but if you do that then yellow does rg6#.
the only move that stops rg6# is be8, but if you do that then yellow does nk12#.

they ARE the only move, unless your also counting bg10, which a) still allows nk12 and b) allows rxg10 which is also forced mate in 1
road there is 1 move you have not considered KEY WORD delay mate in 1.
EDIT: You are going to think the solution is so dumb, but it does delay mate.

actually we are both wrong.
no matter what blue plays there is no mate in 1 because green has qd5 to check, and if yellow did rg8 to stop that check then green just takes the bishop, checkmate isnt threatened.
you are still more wrong because after qd5 there is no followup. its just mate in a couple
Blue to move.
There is only 1 correct move for blue (all others allow mate in 1). Find it.
FEN4:
B-0,0,0,0-1,1,0,0-1,1,0,0-0,0,0,0-0-
6,yR,yK,1,yN,bB,3/
3,yP,yP,yP,2,yP,1,yP,3/
5,yN,1,yB,1,yP,4/
bR,bP,9,gP,2/
1,bP,11,rQ/
bB,bP,bN,4,gQ,4,gP,gB/
bK,bP,9,gP,1,gK/
1,bN,bP,8,rB,gB,1/
2,bP,9,gP,1/
1,bP,10,gP,gN/
bR,bP,5,rP,4,gP,gR/
8,rN,5/
3,rP,rP,rP,1,rB,rP,rP,rP,3/
3,rR,rN,2,rK,2,rR,3
Also I was thinking of doing a 4pc Daily puzzle / puzzles, which I would start compiling if anyone thinks that is a good idea.