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The most difficult, complex puzzle I have ever written or likely will ever write

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Greenatic

I know I've made an extravagant claim in the title.  Give me a chance Wink
 
This is a Mate in 12.  I discovered it last night when I was trying to design another (considerably less complicated!) puzzle and checking it with Rybka when it found this incredible combination.  I hope you enjoy it.  Smile
 
Many of these lines are extremely intricate, and many of them are over my head.  I've included some sidelines in the solution, but in case there are any questions, you can analyze it with an engine yourself or post your line and I'll respond as soon as I can.
 
If you can solve this entire thing in your head without hints, congratulations.  Laughing
 
Note:  On move 11, there are two obvious candidate moves.  Just keep moving the same piece you have been moving.
 

3FFA

The crazy thing is that this seems to be quite intuitive and the mate itself is simple and yet the pawn promotion makes it so much more. Very interesting, thank you. :)

chesskingdreamer

its easy to figure out once you've got the first move.

Greenatic
chesskingdreamer wrote:

its easy to figure out once you've got the first move.

I don't contest that.  But it certainly is a notch above my other puzzles, the most difficult of which is a Mate in 5.  Embarassed

riptide109

i dont get it XD

riptide109

i solved it, but how he win?

meeeep

Put e5 on e6 and the mate works? (Nf7+ etc.)

heinzie

Keep refining it and in six months or so you'll have something great

Greenatic
orangeishblue wrote:

A series of worthless checks just extends the problem for no reason. It is just a mate in 2.

The purpose is to see how quickly and precisely you can get yourself out of those "worthless checks".

The_Ghostess_Lola

....

Greenatic
orangeishblue wrote:

Forced checks don't make it a problem or complex.

If you don't like the puzzle, so be it.  But other people seem to enjoy it, so I'm satisfied with my work.

meeeep wrote:

Put e5 on e6 and the mate works? (Nf7+ etc.)

I'm sorry, I don't understand the question.

knightofcrashtest


I think black can pull off a win here with Rb4+, but this is just speculation

Greenatic

@knightofcrashtest:  2. axb4 Wink

Chessman265

Lol, too many people here are commenting about the same thing. Does anybody else realize that the white pawns are going up, and the black pawns are going down? axb4 stops all mates, because if a1=N, Ka5, and there are no checks left.

 

Edit: *Ka4, and there are no checks left. I fooled myself going the wrong way :(

Scottrf

2. axb4

Greenatic

@yeres90 1. Rg7 Rb4+? 2. axb4 and White mates five moves later, according to Rybka.

EDIT:  Scottrf beat me to it.  Foot in Mouth