[Retros] eight officers homebase mate (new name for total homebase mate)-STATUS

[andrew buchanan]

Hi Roberto,

Thanks for doing your classification. 

My personal opinion is that it is useful to distinguish the different
squares on which the king is mated, because otherwise e.g. the
interesting mechanisms for mate on h5 are overshadowed by the slightly
quicker mate on h1.

And here is a new mate on h2 to add to your collection:

SPG 8.0 C+
rnbqkbnr/ppppppp1/8/8/4P3/6P1/PPPPN1PK/RNB2BR1

cheers,
andrew

--- raosorio at fibertel.com.ar wrote:


> Hi,

> 

> Having in mind Andrew's comment,

> 

> "In contrast to Roberto, I would not object if one of these SPGs

> involved the capture 

> of homebase officers" 

> 

> I've changed the task name for a more precise one: EIGHT OFFICERS

> HOMEBASE MATE.

> 

> This presents 11 task cases that are included in the general concept

> of homebase, where 

> some officers could be absent. After optimizing this, the general

> approach could be started.

> I include here downstream the task definition, the cases and present

> status, wich includes

> many inedit PGs from Lois/Osorio.

> 

> This task, combined with the economy on pawn captures, defines a

> challenging working

> line. I'm sure that everybody will find that  the here included PGs

> are not trivial or too easy to

> solve. solutions are not included yet to make it funnier.

> 

> Nicolas will find here an answer to his request,

> 

> "It might be appealing to find a case where the 2 records are

> different. 

> I tried Kh3 with only Pd7 missed for black, without success"

> 

> 

> EIGHT OFFICERS HOMEBASE MATE - CONCEPTUAL DEFINITION

> 

> CONSTRAINTS

> PG diagram showing a mate position where the mating side has its 8

> officers

> at homesquare and the remaining pawns at homesquare too. Standard

> material

> 

> CASES

> There are 11 different cases based on the checking piece and the

> checking line

> ( the mated king position is not relevant, just the checking line)  

> 

> R(h)    - mate by rook on (h) row

> R(a)    - mate by rook on (a) row

> B(c)    - mate by c1/c8 bishop

> B(f)    - mate by f1/f8  bishop

> Q(lD)   - mate by queen  on its homesquare long diagonal

> Q(sD)   - mate by queen  on its homesquare short diagonal

> Q(d)    - mate by queen  on (d) row.

> N(b)K(a)- mate by knight from its b1/b8 homesquare and oposite king

> on a3/a6

> N(b)K(c)- mate by knight from its b1/b8 homesquare and oposite king

> on c3/c6

> N(g)K(f)- mate by knight from its g1/g8 homesquare and oposite king

> on f3/f6

> N(g)K(h)- mate by knight from its g1/g8 homesquare and oposite king

> on h3/h6

> 

> 

> TASK DEFINITION

> Defining,

> 

> p: homebase mating side missing pawns

> m: PG single moves

> c: other side missing pieces

> 

> a PG is characterized as (p,m,c). The task asks for economy, so p, m

> and c have

> to be minimized. Two different orders define two different tasks,

> 

> 1) Material task: minimize first p, then m and finally c.

> 2) Dynamic task : minimize m, then p and finally c.

>  

> 

> PRESENT STATUS (nov 19th 2006)

> In the vacancy of dynamic record the existing material one is

> considered to be the

> double record.

> 

>            MATERIAL TASK                      DYNAMIC TASK

>

************************************************************************

> CASE      (p,m,c)   Author                    (p,m,c)   Author

>

************************************************************************

> R(h)    - (1,14,?)  Andrew Buchanan           

>

------------------------------------------------------------------------

> R(a)    - (1,18,?)  Andrew Buchanan            

>

------------------------------------------------------------------------

> B(c)    - (1,28,6)  R.Osorio & J.Lois         (2,24,1) R.Osorio &

> J.Lois

>

------------------------------------------------------------------------

> B(f)    - (1,27,3)  J.Lois & R.Osorio

>

------------------------------------------------------------------------

> Q(lD)   - (1,27,4)  J.Lois & R.Osorio         (2,18,4) Nicolas Dupont

>

------------------------------------------------------------------------

> Q(sD)   -

>

------------------------------------------------------------------------

> Q(d)    - (1,19,3)  J.Lois & R.Osorio         (2,17,2) R.Osorio &

> J.Lois

>

------------------------------------------------------------------------

> 

> N(b)K(a)- (1,24,4)  R.Osorio & J.Lois

>

------------------------------------------------------------------------

> 

> N(b)K(c)- (2,25,3)  J.Lois & R.Osorio

>

------------------------------------------------------------------------

> 

> N(g)K(f)- (3,27,5)  R.Osorio & J.Lois

>

------------------------------------------------------------------------

> N(g)K(h)- (1,24,4)  J.Lois & R.Osorio

>

************************************************************************

> 

> 

> The proof games

>

------------------------------------------------------------------------

> R(h)     (1,14,?)  Andrew Buchanan

>                    rnbqkbnr/ppppppp1/8/8/4P3/3B4/PPPPNPP1/RNB3RK

> 

> R(a)     (1,18,?)  Andrew Buchanan

>                    rnbqkbnr/1ppppppp/8/8/3P1Q2/4B3/1PP1PPPP/KR3BNR

> 

> Q(d)     (1,19,3)  Jorge Lois & Roberto Osorio

>                    rnb1q3/pppkrp2/2p1p2p/8/8/8/PPP1PPPP/RNBQKBNR

> 

> Q(d)     (2,17,2)  Roberto Osorio & Jorge Lois

>                    rnb1qbn1/p1pkppp1/2p1p3/8/8/8/PP2PPPP/RNBQKBNR

> 

> Q(lD)    (1,27,4)  Jorge Lois & Roberto Osorio

>                    1n4n1/2q1p3/2pr2pr/6bk/7p/8/PPPP1PPP/RNBQKBNR

> 

> Q(lD)    (2,18,4)  Nicolas Dupont

>                    rnbqkbnr/ppp2ppp/8/4P2B/7K/6B1/PP4PP/RNBQKBNR

> 

> B(f)     (1,27,3)  Roberto Osorio & Jorge Lois

>                    1n4n1/rpp3p1/kb3r2/p3p1q1/8/7b/PPPP1PPP/RNBQKBNR

> 

> B(c)     (1,28,6)  Jorge Lois & Roberto Osorio

>                    rnbqkbnr/ppp1pppp/8/2P5/7P/6BK/P3P1PQ/5NN1

> 

> B(c)     (2,24,1)  Roberto Osorio & Jorge Lois

>                    rsbqkbsr/ppp2ppp/2P5/8/8/3PP1BK/P2PS1PP/RS1Q1B1R

> 

> N(g)K(h) (1,24,4)  Jorge Lois & Roberto Osorio

>                    rnbqkbnr/ppppppRp/7K/6BP/8/4P3/PP3PP1/1N1Q2N1

> 

> N(g)K(f) (3,27,5)  Roberto Osorio & Jorge Lois

>                    3q1bs1/5p1p/5p2/3p4/4r1b1/5k2/PPP1sP1P/RSBQKBSR

> 

> N(b)K(a) (1,24,4)  Roberto Osorio & Jorge Lois

>                    rnbqkbnr/pRpppppp/K7/PB6/8/3P4/1PP3PP/1N1Q2N1

> 

> N(b)K(c) (2,25,3)  Jorge Lois & Roberto Osorio

>                    rn1q4/pppprpp1/8/8/1bn5/2k5/P1P1PPPP/RNBQKBNR

>

-------------------------------------------------------------------------

> 

> 

> 

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