Nf3 seems pretty obvious- the g-pawn is pinned, and the rook is tied to the defense of his queen, the only king move is Kh1 and if he goes there, black mates with Qd1 check followed by Rd1#. So, white must trade a knight for a queen to avoid mate. In detail:
1. …..Nf3 2. Rf3
As mentioned [2.Kh1 Qd1 3.Qd1 Rd1#]
2. …..Qc2 wins.
The above is the best line for black, but I think he will also win with Qf4, but there, the exchange will be a rook for a queen:
1. …..Qf4 2. Kg1
Alternatives are no better. On 2.Kh1 or 2.g3, black plays Rd2 anyway. Continuing:
Nf3
2 seconds
Nf3+ solves it all.
…Nf3+
Nf3 seems pretty obvious- the g-pawn is pinned, and the rook is tied to the defense of his queen, the only king move is Kh1 and if he goes there, black mates with Qd1 check followed by Rd1#. So, white must trade a knight for a queen to avoid mate. In detail:
1. …..Nf3
2. Rf3
As mentioned [2.Kh1 Qd1 3.Qd1 Rd1#]
2. …..Qc2 wins.
The above is the best line for black, but I think he will also win with Qf4, but there, the exchange will be a rook for a queen:
1. …..Qf4
2. Kg1
Alternatives are no better. On 2.Kh1 or 2.g3, black plays Rd2 anyway. Continuing:
2. …..Rd2
3. Qd2
Forced by the threat of Qf2 followed by mate:
3. …..Qd2 will win easily, too.
1.. Nf3+ 2. Rxf3 Qxc2 wins.
Otherwise, if 2. Kh1 Qe1#.
1. … Nf3+
2. (a) RxN QxQ 0-1
2. (b) Kh1 Qe1# or Ng3#
Mark
Nf3+ !!
White wins the queen, or black get mated
1. Nf3+ is pretty – if the white K goes to the back rank then Qe1#, so Rxf3 is forced and the white Q lost its protection.
Nf3+ wins
Seems quite simple..I think
1. Nf3+! RxN (forced, otherwise 1. … Kh1 2. Qe1#)
2. QxQ
Or am I missing something else?
…Nf3ch.
White must now play Rxf3 to prevent mate (Qe1), after which Black wins the Queen.
Cf3+
How about Ng4+?! It seems it also wins!