[Retros] Retros Digest, Vol 146, Issue 8

[Dominique Forlot]

this pj is very pleasant with a beautiful Turton : 5.Qd1-h5 Bc8-g4 6.... Bg4-d1 
and a Loshinsky : 8... Qd2-h6 9.Bc1-g5 ... 10.Bg5xPe7
In a symmetric inverse move . (very nice )


Dominique.



> Message du 04/09/16 07:42
> De : retros-request at janko.at
> A : retros at janko.at
> Copie à : 
> Objet : Retros Digest, Vol 146, Issue 8
> 
> 
> Thanks to François for clearing up many of the issues. There have been a
> number of suggestions for follow-up questions but I continue to be
> interested in the idea (raised by Dominique) of maximizing the average
> distance per move in a sound SPG (with or without conditions such as
> checkmate or no-capture). This is true despite (or possibly because) of the
> fact that the computer will not settle this issue in the near future. The
> Mate SPG in 11.5 shown below achieves an average above 3.91
> (19+36*SQRT2+9*SQRT5) by extending the scheme proposed by Dominique. I
> suspect it is possible to surpass 4.0.
> 
> Natch 3.0.beta Copyright (C) 1997,98,99,2001-2005,2016 Pascal Wassong
> 
> +---+---+---+---+---+---+---+---+
> | | . | | . |*K | . |*S |*R |
> +---+---+---+---+---+---+---+---+
> |*P |*P |*P | | . | Q |*P |*P |
> +---+---+---+---+---+---+---+---+
> | B | . | | . | | . | |*Q |
> +---+---+---+---+---+---+---+---+
> | . | | . | | S | | . | |
> +---+---+---+---+---+---+---+---+
> | | . | | . | | . | | B |
> +---+---+---+---+---+---+---+---+
> |*B | |*S | | . | | . | |
> +---+---+---+---+---+---+---+---+
> | P | P | P |*R | | P | P | P |
> +---+---+---+---+---+---+---+---+
> | R | | . |*B | . | R | K | |
> +---+---+---+---+---+---+---+---+
> 4k1sr/ppp2Qpp/B6q/4S3/7B/b1s5/PPPr1PPP/R2b1RK1
> 23 single moves. 13 + 13
> 
> The resolution begins at Fri Sep 02 22:01:50 2016
> 
> Solution 1 (position 2)
> 1.Sg1-f3 Sb8-c6 2.Sf3-e5 Sc6-d4 3.Se5xPd7 Sd4xPe2 
> 4.Sd7-e5 Se2-c3 5.Qd1-h5 Bc8-g4 6.Bf1-a6 Bg4-d1 
> 7. O-O Qd8xPd2 8.Sb1-a3 Qd2-h6 9.Bc1-g5 Ra8-d8 
> 10.Bg5xPe7 Rd8-d2 11.Be7-h4 Bf8xSa3 12.Qh5xPf7 
> 
> The resolution ends at Fri Sep 02 22:01:50 2016
> Solution found: 1
> Positions analysed: 3
> Resolution time: 0.23 s 
> 
> In the above notation uncaptured pieces are identified in order to make it
> easy to play backward from the diagram. This is a task problem without much
> artistic merit still there are some points of interest such as the unique
> destination of 4...Se2-c3, the requirement for a "Turton Voidance" of g4 by
> WQ for BB that invalidates 5.Qd1-f3 and the requirement for "Bristol"
> clearance of g5 by BQ for WB that invalidates 8...BRa8-d8.
> 
> Yoav 
> 
> -----Original Message-----
> From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Nicolas Dupont
> Sent: Friday, September 02, 2016 5:25 PM
> To: retros at janko.at
> Subject: Re: [Retros] FW: FW: Distance-PG
> 
> > 1. e3 f6 2. e4 Kf7 3. e5 Kg6 4. e6 Kg5 5. d3+ Kh4 6. g3# 1. f3 b6 2. 
> > f4 Bb7 3. f5 Qc8 4. f6 Kd8 5. fxg7 f6 6. gxf8=Q# 1. f3 b6 2. f4 Bb7 3. 
> > f5 Qc8 4. f6 Kd8 5. fxg7 f6 6. gxf8=R# 1. h3 b6 2. h4 Bb7 3. h5 Qc8 4. 
> > h6 Kd8 5. hxg7 h6 6. gxf8=Q# 1. h3 b6 2. h4 Bb7 3. h5 Qc8 4. h6 Kd8 5. 
> > hxg7 h6 6. gxf8=R#
> 
> As a matter of fact, solution becomes unique with the "no capture"
> condition. It makes me think that this condition may be added or replace the
> mate condition, leading to NC#(a,b,c) and NC(a,b,c).
> 
> Among other questions, it would be interesting to find the highest/lowest
> possible average speed under those new setups... I beg that the above first
> game is actually the record for lowest NC#.
> 
> 
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