RE: Chess problem 55 / Schachaufgabe 55

[juanmi96]

First, the eighth row is very weak, so, if white could take the black Rook on a8 with check, white would win by checkmate. On the other hand, The queen in column b is the only piece that defend the b3 square, thus:

1. Kg3 (attaking the Rook on a8 with the Queen) Qe1+

   Black can't take the Queen on h1:
   1. ... Qxh1
   2. Bb3+ Kh8
   3. Nf7+ Kg8
   4. Nd8+ Kh8
   5. Rf8#
   Or
   3. Ng6+ hxg6
   4. Rh4#
   

2. Kh3 (No more checks with senses) The game is lose for black. If black move the Rook, for example:
   2.. ... Re8 (attaking the Knight)
   3.. Qd5+ Kh8
   4.. Nf7+ Kg8
   5.. Nh6+ (double check) Kh8
   6.. Qg8+ Rxg8
   7.. Nf7# (Smothered mate)

Comments

[jaki01]

1. Kg3 Rd8 -> What now?

Also:
1. Kg3 Qg1+ -> What now?

And:
1. Kg3 h6 -> What now?

Finally:
1. Kg3 h5 -> What now? :)

Sorry for bad formatting before editing the comment!

[juanmi96]

Here I go:

1. Kg3 Rd8 -> What now?	1. Kg3 Qg1+ -> What now?	1. Kg3 h6 -> What now?	1. Kg3 h5 -> What now?
2.. Qd5+ Rxd5	2.. Kh3 Qxh2+	2.. Qxa8+ Kh7	2.. Qxa8+ Kh7
3.. a8=Q+ Qb8	3.. Qxh2 Qxa4	3.. g6+ Qxg6+	3.. Qf3(attacking a5) Qg1+
4.. Qxb8+ Rd8	4.. Qg2 Qxh7	4.. Nxg6 Kg6	4.. Kh3 Qxg5
5.. Qxd8# easy xD	5.. Qd5+ Kh8	5.. Bc2+ Kg5	5.. Bc2+ g6
	6.. Ng6+ hxg6	6.. Qd8+ Kh5	6.. Qb7+ Kh6
	7.. Rh4#	7.. Qh4#	7.. Nf7+ Kg7
			8.. Nxg5+ Kh6
			9.. Qh7+ Kxg5
			10.. Qxg6+ Kxf4
			11.. Qg3# (Qf5#) Very very difficult xD

[jaki01]

After

1. Kg3 Qg1+
2. Kh3 Qxh2+
3. Qxh2 Qxh4 is not possible. In case you mean Qxa4, then
4. Qg2 Rd8 -> What now?

Interesting is also:

1. Kg3 Qg1+
2. Kh3 Qxh2+
3. Qxh2 Qa3 -> What now?

After

1. Kg3 h6
2. Qxa8+ Kh7
3. g6+ Qxg6+
4. Nxg6 Qg1+ -> What now?

The last sequence (1. Kg3 h5) is accepted, but please check your notation again (4. Kg3 is not possible).

By the way, just as a hint: chess software is not allowed to solve my problems (apart from some exceptions where I explicitly inform the competitors). I am sure you are aware of that, are you? :-)
I mention that because your variations are very accurate without any small typical human errors ... I didn't say you are using chess software - just wanted to state the rules again, just in case ... :)

Edit: Sleeping time for me: I will check all remaining answers tomorrow. Good night for now. :)

[juanmi96]

1. Apologies for the notation, with so many letters it's easy to get wrong
2. I know that chess software are not allowed, I think moves are forced in most cases, anyway, I present you my chess software :)
   

[juanmi96]

• 4.. Qg2 Rd8 -> What now?
  5.. Rxd4!! This move took me a long time to see it
  If Rxd4, Qa8#
  If Qxd4, a8=Q winning the game.

• 3.. Qxh2 Qa3 -> What now?
  4.. Qg2 (attacking the Rook again) Rd8
  5.. a8=Q Qd6
  6.. Bb2+ Kh8
  7.. Nf7+ Kg7
  8.. Nxd6+ Kh8
  9.. Qd8#

• 4.. Nxg6 Qg1+ -> What now?
  5.. Qg2 Qe1+
  6.. Kh3 Bxa7
  7.. Rf8!!

I'm very sorry if I made you doubt. Chess is my favorite sport and I always try to do my best.

[jaki01]

Don't worry! I had to ask that. It seems you are very talented & engaged solving my chess problems. :)
I will put an official solution now with a few selected variations.
I hope you had solving this chess riddle which cost me quite some time to compose. :)

[greenwhell79]

tnx for resteem