Practical quickie tactic Chess tactic, Puzzle Solving Black to move. How should black proceed? Source: ChessToday.net Chess Daily News from Susan Polgar
Knights often have a real problem stopping an advanced passed pawn. Seen it enough over the last decade to spot it almost instantly:
1. …..Bb2
2. Nb2 a3 (or Bf1 first)
And the pawn can’t be stopped. It will do white no good to not take the bishop, black just pushes a3 anyway to win the knight.
1. … Bxb2 (threatening 2. … a3 etc.) 2. Nxb2 Bxf1+ 3. Kxf1 a3 0-1
Bxb2,….if Nxb2 then Bxf1+, Kxf1 and a3 wins
1…. Bxb2 2. Nxb2 Bxf1+ 3. Kxf1 a3 and black gets a Q
1…Bxb2 2Nxb2 Bxf1+ 3.Kxf1 a3 and black will promote his pawn
Easy. Is more a “3 sec challenge”.
1 …. Bxb2, 2 Nxb2 (else white has to give up a peace to stop the a pawn) 2… bxf1+ 3 Kxf1 a3 and game over, unstoppable.
B x b2
k xBb2
a3
1. Bxb2 Nxb2
2. Bxf1+ Kxf1
3. a3. Nd1 (forced)
4. a2. Any move
5. a1Q
1) Bb2 Cb2
2) Bf1 Kf1
3) a3
a2 queens
1…. Bxb2
If 2Nxb2
2….. Bxf1+
3.Kxf1 a3 and queening can not be stopped.
Even if the B is not captured black plays a3 and queens.
1. … Bxb2 2. Nxb2 a3. I am pretty sure you get an unstoppable passed pawn.
That said, trading bishop for knight and then picking up the e and then b pawn looks like a won endgame to me.
Based on a VERY important endgame pattern!