[Retros] A Nit-Picking Question

[Renny Bosch]

Thank you very much, Ryan.  I had suspected that the given statement of 150 
half-moves was probably the optimum but couldn't see the solution.

Renny Bosch

----- Original Message ----- 
From: "Ryan M." <DoubleExclam at comcast.net>
To: "Retro Mailing List" <retros at janko.at>
Sent: Saturday, December 04, 2004 11:03 PM
Subject: RE: [Retros] A Nit-Picking Question



> The fastest route to uncapture is indeed 150 single moves.

>

> Retract:

>

>  -1.Rh1-g1 Bb8-a7 -2.Rh5-h1 Ba7-b8 -3.Rd5-h5 Bb8-a7 -4.Rd2-d5 Ba7-b8

> -5.Rc2-d2 Bb8-a7

>  -6.Rc1-c2 Kc2-b3  -7.Ra1-c1 Kd2-c2  -8.Bb4-a3 Ke1-d2  -9.Ra3-a1 Kd2-e1

> -10.Rb3-a3 Ke1-d2

>  -11.Ba3-b4 Kd2-e1  -12.Rb5-b3 Ke1-d2  -13.Ra5-b5 Kd2-e1  -14.Ra7-a5

> Ke1-d2  -15.Rb7-a7 Ba7-b8

>  -16.Rb8-b7 Kd2-e1  -17.Kg8-f8 Ke1-d2  -18.Rf8-b8 Re8-e7  -19.Kh8-g8

> Rb8-e8  -20.Rc8-f8 Rb7-b8

>  -21.Kg8-h8 Bb8-a7  -22.Kf8-g8 Ra7-b7  -23.Ke7-f8 Ra5-a7  -24.Rd8-c8

> Ba7-b8  -25.Rb8-d8 Rb5-a5

>  -26.Rb7-b8 Bb8-a7  -27.Ra7-b7 Rb3-b5  -28.Bb4-a3 Ra3-b3  -29.Ra5-a7

> Ra1-a3  -30.Rb5-a5 Rc1-a1

>  -31.Ba5-b4 Rc2-c1  -32.Rb3-b5 Rd2-c2  -33.Ra3-b3 Rd6-d2  -34.Ra1-a3

> Rd5-d6  -35.Rc1-a1 Rf5-d5

>  -36.Rc2-c1 Rf4-f5  -37.Rd2-c2 Re4-f4  -38.Rd6-d2 Rd4-e4  -39.Rd5-d6

> Rd2-d4  -40.Rd4-d5 Rc2-d2

>  -41.Rd2-d4 Rc1-c2  -42.Rc2-d2 Ra1-c1  -43.Rc1-c2 Ra3-a1  -44.Ra1-c1

> Rb3-a3  -45.Ra3-a1 Rb5-b3

>  -46.Bb4-a5 Ra5-b5  -47.Rb3-a3 Ra7-a5  -48.Ba3-b4 Rb7-a7  -49.Rb5-b3

> Ba7-b8  -50.Ra5-b5 Rb8-b7

>  -51.Ra6-a5 Rg8-b8  -52.Ra5-a6 Bb8-a7  -53.Ra7-a5 Rh8-g8  -54.Rb7-a7

> Ba7-b8  -55.Rb8-b7 Rg8-h8

>  -56.Rf8-b8 Bb8-a7  -57.Kd8-e7 Ba7-b8  -58.Kc8-d8 Rh8-g8  -59.Kb7-c8

> Rg8-h8  -60.Rb8-f8 Re8-g8

>  -61.Kc8-b7 Re7-e8  -62.Rb7-b8 Bb8-a7  -63.Ra7-b7 Kd2-e1  -64.Ra5-a7

> Ke1-d2  -65.Rb5-a5 Kd2-e1

>  -66.Rb3-b5 Ke1-d2  -67.Bb4-a3 Kd2-e1  -68.Ra3-b3 Kc2-d2  -69.Ra1-a3

> Kb3-c2  -70.Rc1-a1 Ka2-b3

>  -71.Rc2-c1 Kb1-a2  -72.Rd2-c2 Ka2-b1  -73.Rd5-d2 Kb1-a2  -74.Rh5-d5

> Ka2-b1  -75.Rh1-h5 Ka1-a2

>  -76.h3xBg4

>

> I noticed that the wK need not come out to b5 like the solution claimed.

> That would push the solution past 150 single moves.

>

> -Ryan McCracken

>

> -----Original Message-----

> From: retros-admin at janko.at [mailto:retros-admin at janko.at] On Behalf Of

> Renny Bosch

> Sent: Saturday, December 04, 2004 8:37 PM

> To: retros at janko.at

> Subject: [Retros] A Nit-Picking Question

>

> In "A Collection of Instructive Problems" by Philippe Schnoebelen in the

> Retro Corner, there is a lovely problem by T. Volet (Ded. M. Caillaud &

> N. Plaksin - 1st Prize Rex Multiplex, 1983) with the stipulation "Draw".

> The position is:

>

> n4K2/b1pprppp/1p2p3/2p5/N1P3P1/BkP1P3/1P2PPP1/3N1BR1

>

> In the solution given at http://janko.at/Retros/Misc/Volet1sol.htm it is

> stated that "the last 75 moves (150 single moves) have been without any

> capture or pawn move".  My question is:  Is this statement meant to be

> the strongest that can be made, or does it allow the stronger statement

> to be ". . . the last 76.5 moves (153 single moves) . . ."?

>

. . .

>

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