Daily Chess Improvement: Sharp Eye Tactic!

White to move. How should white proceed? You have 30 second to solve this puzzle :)

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Yancey_Ward
Yancey_Ward

To make progress after Qd6+ Ka8, white must move the king here. It takes a great leap of imagination to envision how this is won from here, but once you find the thread, some of white's moves are a bit easier to find after that because they are forced by black's own threats.

Yancey_Ward
Yancey_Ward

That is correct.

Alena
Alena

Yancey, Here is the critical position where I must find the right move. Am I on the right way?

  1. Qb1 c1=Q
  2. fxe7 Qg5
  3. Qxb2 a1=Q
  4. Qh2+ Ka8
  5. Qg2+ Kb8
  6. Qg3+ Ka8
  7. Qf3+ Kb8
  8. Qf4+ Ka8
  9. Qe4+ Kb8
  10. Qe5+ Ka8
  11. Qd5+ Kb8
  12. Qd6+ Ka8
Yancey_Ward
Yancey_Ward

And when I wrote "he must find a way to guard the e7 pawn, I didn't mean he the king, but he white.

Yancey_Ward
Yancey_Ward

You have to let black keep the queen on g5. The queen goes to d6 to protect the e7 pawn- then find the right square for the white king- it isn't c5 or d6.

Alena
Alena

Yancey, I can't understand how to win this position

  1. Qg3+ Ka8
  2. Qf3+ Kb8
  3. Qf4+ Ka8
  4. Qxg5 Qb2+
  5. Kc5 Qb5+
  6. Kd6 Qb8+
  7. Kd5 Qb5+
  8. Ke4 Qb1+
Yancey_Ward
Yancey_Ward

I hope my meaning is clear- in your line, you continue with 16.Qb1!!- black must defend in exactly the manner you outline, but white can now take at b2, allow black to queen the a-pawn, and then go back to h2 to check and move the queen back up the diagonal.

Yancey_Ward
Yancey_Ward

So far so good, Alena- you see now why the knight had to be removed- when it is on f2, the move Qh2+ can't be played from b2. And you recognize why black's queen on g5 can't leave to capture the white queen anywhere since you clearly see white has repetition draw. To win, white must get the king off the b-file, and he must find a way to guard the e7 pawn before stopping the checks with the queen. The queen needs move back up that same diagonal checking along the way until she reaches the appropriate square so that the king can have the time to move without dropping the e7 pawn.

Alena
Alena
  1. Qb1 c1=Q
  2. fxe7 Qg5
  3. Qxb2 a1=Q
  4. Qh2+ Ka8
  5. Qg2+ Kb8
    I'm stuck here. After this I see only a draw.
Yancey_Ward
Yancey_Ward

Oop, I meant 8.Qe5/9.Qe4 is superfluous.

Yancey_Ward
Yancey_Ward

When the commenter "Cortex" gave me this problem 3 years ago, I thought I had solved it almost instantly with 1.Qb1, but quickly found my error (or, at least, the first one that line showed). If it makes you feel any better, it took me over a week of trial and error to finish the solution, and I had the first 20 moves in the first hour since he had also given me a clue it was "geometrical" (i.e.- the queen's maneuver up and back down the diagonal with checks which I had also immediately noticed was drawing for white at the very least).

Yancey_Ward
Yancey_Ward

That much is correct, but for the superfluous 8.Ke5/9.Ke4 which is not needed since you go back to f4 anyway at move 10. I basically gave you the next move after 15.Qh1 Kb8- did you look at the lines that might arise after the erroneous 1.Qb1? With the knight gone from f2, white can now play this move, though, as I wrote a few days ago- the rest of the solution is quite long and the really hard part is deep within that line. If you keep updating, I will tell you whether or not you are on the right path.

Alena
Alena

Yancey, I tried to solve your problem again.Am I on the right way?

  1. Qh2+ Ka8
  2. Qg2+ Kb8
  3. Qg3+ Ka8
  4. Qf3+ Kb8
  5. Qf4+ Ka8
  6. Be4+ Nxe4
  7. Qxe4+ Kb8
  8. Qe5+ Ka8
  9. Qe4+ Kb8
  10. Qf4+ Ka8
  11. Qf3+ Kb8
  12. Qg3+ Ka8
  13. Qg2+ Kb8
  14. Qh2+ Ka8
  15. Qh1+ Kb8
Yancey_Ward
Yancey_Ward

To be more specific, the first 5 moves are correct- it is the 6th move where it goes offline.

Yancey_Ward
Yancey_Ward

You have the right start- the march up the diagonal with the queen plays a part twice in the solution. The early key to the solution is getting rid of the knight on f2. Even though it is wrong, at least investigate the line that starts with 1.Qb1 and ask yourself how black defends against that- when you see that, then you will understand the reason for getting rid of black's f2 knight.

Alena
Alena

Yancey, I tried to solve your problem.

  1. Qh2+ Ka8
  2. Qg2+ Kb8
  3. Qg3+ Ka8
  4. Qf3+ Kb8
  5. Qf4+ Ka8
  6. Qf3+ Kb8
  7. Qg3+ Ka8
  8. Qf3+
    It's a draw.
    It seems to me that the move 5.Bxc2 is also an interesting move, but I can't win in all variations.
DaveCubby
DaveCubby
  1. f5+!
    a) 1...Rxf5, 2. Qxf5+ Ke7, 3. Qf7+ Kd8, 4. Qe8+ Kc7, 5. Qc8#
    b) 1...Kxe5, 2. Qe7+ Kd4, 3. Qe3# 1-0
DaveCubby
DaveCubby

Arein22 - Not a mate - 2. Qe8+ Rxe8 (Black wins)

Yancey_Ward
Yancey_Ward

Alena, how are you doing with that puzzle?

Yancey_Ward
Yancey_Ward

test

No. 26-31
Yancey_Ward
Yancey_Ward

If 1.f5 Kxe5, then 2.Qe7 Kd4 3.Qe3#

atulborkar
atulborkar

what is continuation for F5+ Kxe5?

atulborkar
atulborkar

Hi. After f5 what if kxe5?

Alena
Alena
  1. f5+ Rxf5
  2. Qxf5+ Ke7
  3. Qf7+ Kd8
  4. Qe8+ Kc7
  5. Qc8#
    It took me 1 minute to solve though.
Arein22
Arein22
  1. Qg6+ Ke7 2. Qe8#

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