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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).