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Jesper Norgaard
16-07-2015, 12:19 AM
8/1PK5/8/8/8/8/pk6/N7 w - - 0 1

White to move and win. A little composition I made last night. Quite looking like a real OTB endgame I would say.

Agent Smith
16-07-2015, 09:25 AM
Tricky :) This continuation (in white) is interesting.

In it, the knight reappears.
1. b8=Q+ Kxa1 2. Kb6 Kb1 3. Kc5+ Ka1 4. Kb4 Kb2 5. Qh2+ Kb1 6. Kb3 a1=N+ 7. Kc3 Nc2 8. Qxc2+ Ka1 9. Qb2# *

Jesper Norgaard
17-07-2015, 02:14 AM
Tricky :) This continuation (in white) is interesting.

In it, the knight reappears.
1. b8=Q+ Kxa1 2. Kb6 Kb1 3. Kc5+ Ka1 4. Kb4 Kb2 5. Qh2+ Kb1 6. Kb3 a1=N+ 7. Kc3 Nc2 8. Qxc2+ Ka1 9. Qb2# *

Yes, this is correct. The only point is of course that 2.Kb6! wins two tempi which is exactly enough to win the position. However, Black should not cooperate like this with 3...Ka1 but instead play 3...Kc1!? hoping that White does not regroup the queen correctly. On 3...Kc2?! 4.Qh2+! is correct and after 4...Kb1 5.Kb4 (or Kc4) a1=Q 6.Kb3 we get to the solution quicker. After 3...Kc1!? instead White must play 4.Qe5 (or 4.Qf4+) Kb1 5.Qe1+ Kb2 6.Qd2+ Kb1 7.Kb4 a1=Q 8.Kb3 Qc3+ (hopeless as anything else) 9.Kxc3 (not 9.Qxc3 stalemate!) Ka1 10.Qb2+ checkmate. In your line a knight reappears, but of different breed (black Stallion).

paulo101977
23-06-2020, 12:56 AM
8/1PK5/8/8/8/8/pk6/N7 w - - 0 1

White to move and win. A little composition I made last night. Quite looking like a real OTB endgame I would say.

So, I believe that the first movement is forced, with the promotion to Dama by white with check.

Desmond
30-06-2020, 09:23 AM
Just putting the solution from Agent Smith and Jesper into the PGN viewer:

1.b8=Q+ Kxa1 2.Kb6 Kb1 3.Kc5+ Ka1
(3...Kc1 4.Qe5 Kb1 5.Qe1+ Kb2 6.Qd2+ Kb1 7.Kb4 a1=Q 8.Kb3 Qc3+ 9.Kxc3 Ka1 10.Qb2#)
(3...Kc2 4.Qh2+ Kb1 5.Kb4 with the same finish as above)
4.Kb4 Kb2 5.Qh2+ Kb1 6.Kb3 a1=N+ 7.Kc3 Nc2 8.Qxc2+ Ka1 9.Qb2#

paulo101977
30-06-2020, 10:36 PM
I will use the PGN viewer to share some chess compositions.