- 09 Apr '06 08:16Since no one else seems to take it, here my attempt:

1.Re4 is more or less forced e1=Q+ 2.Rxe1 Bxe1+ 3.Kh5 bxa6 4.Rb7 Ke8 (white threatened e6!) 5.Nxd7 f2 (or Kd8 Nf6 f2) 6.Nf6+ Kd8 7.e6 f1=Q 8.e7+ Kc8 9.e8=Q+ Kxb7 10.Qd7+ and now if black wants to try to escape from queen checks he must come down with the king Kb6 11.Qd8+ Kb5 12.Qd5+ Ka4 13.Qa2+ = white moves back and forth between a2 and d5, or if the king moves back up, the queen continues to give checks. - 09 Apr '06 17:19 / 1 edit

Close, but after 1.Re4 black has the chance to get a perpetual check...*Originally posted by Mephisto2***Since no one else seems to take it, here my attempt:**

1.Re4 is more or less forced e1=Q+ 2.Rxe1 Bxe1+ 3.Kh5 bxa6 4.Rb7 Ke8 (white threatened e6!) 5.Nxd7 f2 (or Kd8 Nf6 f2) 6.Nf6+ Kd8 7.e6 f1=Q 8.e7+ Kc8 9.e8=Q+ Kxb7 10.Qd7+ and now if black wants to try to escape from queen checks he must come down with the king Kb6 11.Qd8+ Kb5 12.Qd5+ Ka4 13.Qa2+ = whit ...[text shortened]... k and forth between a2 and d5, or if the king moves back up, the queen continues to give checks.

1.Re4 e1Q+ 2.Rxe1 Bxe1+ 3.Kg5 bxa6 4.e6+ Bxe6 5.Rb7+ Kg8 6.Nxe6 Bc3 (6...f2 7.Rg7+ Kh8 8.Rf7) 7.Rd7 f2 8.Rd1 Kf7 9.Nd8+ Kg7 and the possibility of Bf6+ ensures Black a draw; 10.Nc6 Be1 11.Rd7+ with a perpetual.

I'll give a hint

1.e6+ - 09 Apr '06 17:35

Oops! I misread the puzzle and played for a draw for white. OK, let's try:*Originally posted by coentje***Close, but after 1.Re4 black has the chance to get a perpetual check...**

1.Re4 e1Q+ 2.Rxe1 Bxe1+ 3.Kg5 bxa6 4.e6+ Bxe6 5.Rb7+ Kg8 6.Nxe6 Bc3 (6...f2 7.Rg7+ Kh8 8.Rf7) 7.Rd7 f2 8.Rd1 Kf7 9.Nd8+ Kg7 and the possibility of Bf6+ ensures Black a draw; 10.Nc6 Be1 11.Rd7+ with a perpetual.

I'll give a hint

1.e6+

1.e6+ Bxe6 2.Rxb7+ Kg6 3.f5+ Kxf5 4.Nd3 Bxc4 (still have to figure out Be1+ 5.Nxe1 f2) 5.Bxc4 Ke4 6.Ba6 e1=Q6 7.Nxe1 Bxe1+ 8.Kh3 and white's problems are over. He will grab pawn h7 next and win, but not in a trivial way.

Anyone better? - 09 Apr '06 17:56

Again close*Originally posted by Mephisto2***Oops! I misread the puzzle and played for a draw for white. OK, let's try:**

1.e6+ Bxe6 2.Rxb7+ Kg6 3.f5+ Kxf5 4.Nd3 Bxc4 (still have to figure out Be1+ 5.Nxe1 f2) 5.Bxc4 Ke4 6.Ba6 e1=Q6 7.Nxe1 Bxe1+ 8.Kh3 and white's problems are over. He will grab pawn h7 next and win, but not in a trivial way.

Anyone better?

Here is the final solution though beautiful mate at the end.

1.e6+

Not 1.Nd3 e1Q+ 2.Nxe1 f2, or 1.Re4 e1Q+ 2.Rxe1 Bxe1+ 3.Kg5 bxa6 4.e6+ Bxe6 5.Rb7+ Kg8 6.Nxe6 Bc3 (6...f2 7.Rg7+ Kh8 8.Rf7) 7.Rd7 f2 8.Rd1 Kf7 9.Nd8+ Kg7 and the possibility of Bf6+ ensures Black a draw; 10.Nc6 Be1 11.Rd7+ with a perpetual.

1...Bxe6 2.Rxb7+ Kg6 3.f5+ Kxf5

Or 3...Bxf5 4.Rb6+ Kf7 5.Nd3!

4.Nd3

(4.Re4 Bd5!) Now Black loses after 4...e1Q+ 5.Nxe1 Bxe1+ 6.Kh3 Bxc4 7.Bxc4 and after 4...f2 5.Rc5+ Kf6 6.Nf4 f(e)1Q 7.Nh5+ Kg6 8.Bd3+ Kh6 9.Rxh7 mate, but he has the unlikely

4...Be1+!

Blocking his own promotion square. 4...e1Q+ 5.Nxe1 Bxe1+ 6.Kh3 Bxc4 7.Bxc4 leads to a slow but inevitable death.

5.Nxe1 f2

It seems the other pawn will promote. But:

6.Rf4+! Kxf4

Now after 7.Ng2+? Kf3 Black would win, as b7 is blocked. Vacating this square is worth a rook.

7.Rxb4+

The pawns' fate seems sealed now: 7...Kf5 8.Bd3+ Kf6 9.Rf4+ or 7...Ke3 8.Nc2+ Kd2 9.Rd4+ followed by Bxe2.

7...Bc4!

The last resort - an unguarded guard (also a Novotny) to close the diagonal a6-e2.

8.Rxc4+ Kf5 9.Rf4+!

After two bishop sacrifices by Black, now a second rook sacrifice by White, to open the diagonal again.

9...Kxf4 10.Ng2+ Kf3

To prevent Bxe2. But now:

11.Bb7 with a fairy tale mate in which, except for pawn h7, all remaining pieces cooperate. - 09 Apr '06 19:45

well, that was the line I was still working out, no?*Originally posted by coentje***Again close**t

Here is the final solution though beautiful mate at the end.

1.e6+

Not 1.Nd3 e1Q+ 2.Nxe1 f2, or 1.Re4 e1Q+ 2.Rxe1 Bxe1+ 3.Kg5 bxa6 4.e6+ Bxe6 5.Rb7+ Kg8 6.Nxe6 Bc3 (6...f2 7.Rg7+ Kh8 8.Rf7) 7.Rd7 f2 8.Rd1 Kf7 9.Nd8+ Kg7 and the possibility of Bf6+ ensures Black a draw; 10.Nc6 Be1 11.Rd7+ with a perpetual.

1...Bxe6 2.Rxb7+ Kg6 3.f5+ ...[text shortened]... :

11.Bb7 with a fairy tale mate in which, except for pawn h7, all remaining pieces cooperate.