Showing posts with label Our own compositions. Show all posts
Showing posts with label Our own compositions. Show all posts

Wednesday, 25 November 2015

A little chess experiment...

by Andrew

I have composed a couple of problems to help you test your decision making and creative thinking capacities in chess. To give myself the best chance of avoiding people hating me following this exercise, I will advise you to take a very close look at the initial position before you make your first move. Good luck!


                                  Position 1: White to play, mate in 20 moves or less




If you were able to solve this, well done. Your solution may resemble somewhat one of the following lines:



If you weren't able to solve it, was it too long? Too hard? Too boring?

Okay, I understand; try this one instead.

Position 2: White to play, mate in 1


Yes, I have given you the same position--only with a different stipulation. Well, I did say 20 moves or less.

Probably you have found the solution by now, but let us consider for the moment how this position could have arisen. What was Black's last move? For instance, the queen could not have moved last as it already would have been giving check; similarly for the light-squared bishop and d7, and for the e- and g- pawns if they had been on e6 and g6 respectively. The d6 pawn could not have moved on the last turn given the light-squared bishop has somehow made it out already. And no black piece could have moved from a square that with White to move is currently occupied by a white piece.

(By the way, this position is possible: We can assume that prior to this White had played either b6 or c6, and Black had been oscillating with knight or light-squared bishop.)

So, a close inspection reveals that, in fact Black's only possible move prior to this position was  0...g7-g5, upon which, in accordance with the en passant rule, we are allowed to play the move 1.hxg6 checkmate.



Of course it was a bit of a trick puzzle, and perhaps a few readers/solvers dislike me right now for feeling I have wasted their time, but I think it teaches an important principle: that it can be very hard to see what you are not looking for. Maybe you began by seeing the number 20 and expecting the problem to be a very long one, thereby neglecting to appraise the initial position with much scrutiny or lateral thinking. I reckon if I had presented the first problem as "mate in 1" it would have been a very different story. Our expectations and assumptions inform our judgments and the way we view the world all the time without us realising it.

To be creative and heighten your ability to see different possibilities in chess it is important to be willing to identify and question what you think you know, to be open to receiving new information, and not to cast judgment before judgment is due. This, I believe, is the sort of perspective one should try to adopt if one wants to develop and maintain a free-thinking and creative mind, for chess and for life.

I hope, dear reader, that I have not perturbed too severely your faith in my trustworthiness and that you will come back to read my future posts. Next time I will try not to be quite so mean. :)



Wednesday, 10 June 2015

More fun with pins

by Andrew

This time the theme is answering a checkmate (or rather an almost-checkmate) with a checkmate. The first three are pretty simple, while the last has many variations and may require a bit of effort (but hopefully it is worth it!).

 
White mates in 2

 
White mates in 2

 
White mates in 2

 
White mates within 6 moves
 
 
 
 
Solutions
 

 

 

 

Saturday, 18 April 2015

Fun with pins

by Andrew

Here are a couple of puzzles I composed based on the pin.

Pinning Around


 Black to play, mate in 5
 
Pins and Needles

 
 White to play, help mate in 13. "Turn the man standing on his head into the main who has stood on his head for too long."

Solutions below.



 
 

Sunday, 17 August 2014

The Queen in her Glory

by Andrew

I have compiled three puzzles which I hope will provide some aesthetic pleasure to the solver; they are all to do with the queen and its unique abilities.

The first is one I composed and is pretty easy (but fun, I think):

White to play and win

1.Qa1+ Kh7 (1...Qg7 2.Qxg7+ Kxg7 3.dxc6 +-) 2.Qb1+ Kh8 (2... Kg7 3.Qg1+ (or 3.Qg6+) +-) 3.Qb2+ Kh7 4.Qc2+ Kh8 5.Qc3+ Kh7 6.Qd3+ Kh8 7.Qd4+ Kh7 8.Qe4+ Kh8 9.Qe5+ Kh7 10.Qf5+ Kh8 11.Qf6+ Kh7 12.Qg6+ Qxg6 13.hxg6+ Kxg6 14.dxc6 Kf7 15.cxb7 +-



The next I found in a 100-year-old (literally) hand-me-down book called Art of Chess and is labelled in there as an "Old Classic"... who knows just how old it is?

White to play, mate in 14.

1.Qe4+ Qb7 2.Qa4+ Kb8 3.Qf4+ Ka8 (3...Kc8 4.Qf8#) 4.Qf8+ Qb8 5.Qf3+ Qb7 6.Qa3+ Kb8 7.Qg3+ Ka8 8.Qxg8+ Qb8 9.Qg2+ Qb7 10.Qxa2+ Kb8 11.Qh2+ Ka8 12.Qh8+ Qb8 13.Qa1+ Kb7 14.Qa6#



And finally a shorter one (though not easier) by Sam Loyd. 

White mates in 4

1.Qa8 g2 (1...d6 2.Qa1 Kxe2 3.Qf1+ Kd2 4.Qd1#) 2.Qg8 d6 3.Qd5 (Zugzwang) Kxc2 (3...Kxe2 4.Qxg2#) 4.Qa2#



Sunday, 16 December 2012

A Christmas Composition

Here is a study that was unintentionally composed by Charles Zworestine and Andrew Brown, based on our analysis of my (Andrew's) game with Jonas Muller in this year's Australian Young Masters.


Black to play and win
C. Zworestine, A. Brown, and H. 1.5a w32, 2012
 
 
The solution can be seen by highlighting the text below.

1...h5!

If 1...Kf6 2.a5 Ke7 4.a6 Kd6 5.a7 (5.Bf4+ Kc6 -+) Bd5 6.Bf4+! (6.Bh6 Ke6 -+) Ke6 7.Bh6! draw (If 7...Kd6 8.Bf4+ and repeat the position)

If 1...Be6 2.a5 Bc8 3.Kxc4 Ba6+ 4.Kd4 h5 5.Ke5 draw (the king will be cut off from helping the h-pawn advance.)

2.a5 h4 3.a6 h3! 4.a7 Bd5!! 5.Kxd5 h2 6.a8=Q h1=Q+ Black wins

Unfortunately, here it must be pointed out that the third contributor to this study, Mr or Ms H.1.5a w32 actually turns out to be the computer engine Houdini. Initially this was a "White to play and draw" study, with the second line beginning with 1...Kf6 having been found by Charles and myself. It was only when I had to check over it with the computer that it found the amazing line beginning with  1...h5!.

Nonetheless, I found it to be thoroughly delightful, and hope you enjoyed it too.