[Retros] invisible castling / capture free fake castling

[Olli Heimo]

Yes really, there were discussions about invisible castling in years 2006-2007. At that time I was not able to computercheck for the following:

> r1b2bnr/pp1ppppp/1kp5/8/4PB2/Q2P3N/PPPnBPPP/R3KNqR

> SPG 12.5

> Intended solution:

> 1.e4 Nc6 2.Qf3 Ne5 3.Qa3 c6 4.d3 Qb6 5.Bf4 Kd8 6.Nd2 Kc7

> 7.0-0-0 Qe3 8.Nh3 Qe1 9.Be2 Qg1 10.Nf1 Kb6 11.Kd2 Nc4+

> 12.Ke1 Nd2 13.Ra1


Now it has been checked, thanks to Kostas Prentos who voluntarily checked it about 5 years ago. I can't find this captureless queenside promototion switchback on any retro pages. Olli.

.raosorio at fibertel.com.ar kirjoitti 24.09.2012 kello 20:07:

> 

> HI friends,

> 

> Thanks Joost for indicating the discussion antecedents on "invisible

> castling".

> 

> As indicated by Michel Caillaud that time on the RML, visible

>  promotees on

> the board

> are undesirable elements when they can be avoided (this is not

>  surely the

> case in

> the remarkable Andrey's double invisible castling).

> 

> Equivalently, technical captures are a feature that composers intend to

> avoid, excepting when

> looking for the task of minimal number of moves (which is the case here

> with fake castling).

> 

> Based on this, I wonder what's the "capture free fake castling record ".

> Her follows an example,

> 

> 

> rn1qk2r/ppB3pp/3p1n2/4pp2/1bpP1P2/5BPN/PPP1P2P/RN1Q1RKb

> 10.5 moves   C+

> 

> 1. Pd2-d4   Pc7-c5     2. Fc1-f4   Pc5-c4     3. Ff4-c7   Pe7-e5    

>  4. Pf2-f4   Ff8-b4     5. Re1-f2   Pd7-d6     6. Pg2-g3   Fc8-h3    

>  7. Ff1-g2   Pf7-f5     8. Fg2-f3   Fh3-g2     9. Cg1-h3   Cg8-f6    

> 10. Th1-f1   Fg2-h1    11. Rf2-g1   

> 

> I "smell" that this could be improved.

> 

> Best,

> Roberto

> 

> 

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