123 ( +1 | -1 ) Insanely difficult, very neat chess puzzleThought I'd share this one with you - I found it on the chessbase site a while ago, and think that it's the most difficult chess puzzle I've encountered, while also being the one with the most entertaining solution.
Here's the position: www.chessbase.com/puzzle/images/puzzle16d.jpg
White to move. And yes, white is supposed to win that game. :)
Feel free to use a computer if - and when - you fail to solve it. The computer most probably can't solve it either. (I tried it with chessmaster9000 - CM couldn't find the mate... I don't remember how long I gave it, but I think it was at least an hour before I stopped it. Hmm... I've updated my computer since, and have the CM tenth edition - maybe I'll let it have a crack at it...)
And finally, when you and your computer have given up, go to www.chessbase.com/puzzle/puzz16b.htm to read the solution.
Apparently this was introduced to a group of top GM's during a tournament in Brussels in 1987, who analyzed it together without succes untill Tal finally went for a walk in a park, and worked it out during the walk, and came back with the solution.