[Retros] Solutions problems from Mark Kirtley's article
Andrew Buchanan
anselan at hotmail.com
Sat Jan 5 19:04:42 EST 2002
Jens,
Thanks for your reply: your proof game is neat, and I can't find a shorter
one.
However, the point of my mail was to pose the question: how *exactly* do you
define "non-symmetric" here? Since the game array is rotationally
assymetric, it could be argued that even opening moves such as 1 d4 e5 are
non-symmetic. Obviously, this is not the intent, but how to define it?
Cheers,
Andrew.
----- Original Message -----
From: "Jens Guballa" <J.Guballa at t-online.de>
To: <retros at janko.at>
Sent: Saturday, January 05, 2002 3:26 AM
Subject: Re: [Retros] Solutions problems from Mark Kirtley's article
"Andrew Buchanan" <anselan at mediaone.net> writes:
> Re: Shortie number 2
>
> >Can a composer show symmetry across the mid-point of the board, as in
> >1. d3 e6 2. Bh6 Ba3 3. Qd2 Qe7 4. Kd1, but with non-symmetric play?
>
> How exactly do you define "non-symmetric" here? Here are two shortie
> compositions, for example:
>
> rn2qbnr/pppkpppp/3p4/8/8/4P3/PPPPKPPP/RNBQ2NR
> PG 4.0.
>
> rnb1kbnr/pppqpppp/8/8/8/8/PPPPQPPP/RNBK1BNR
> PG 3.5
In both examples above the first move is symmetrical.
I composed the following shortie:
+---+---+---+---+---+---+---+---+
| r | n | b | k | | b | n | r |
+---+---+---+---+---+---+---+---+
| p | p | p | p | | p | p | p |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| Q | | | | | | | |
+---+---+---+---+---+---+---+---+
| | | | | | | | q |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| P | P | P | | P | P | P | P |
+---+---+---+---+---+---+---+---+
| R | N | B | | K | B | N | R |
+---+---+---+---+---+---+---+---+
[rnbk1bnr/pppp1ppp/8/Q7/7q/8/PPP1PPPP/RNB1KBNR]
SPG 4.0
Jens
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