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

[andrew buchanan]

Hi Roberto,


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

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


This position is wrong. There seem to be 2 White Kings for example...

Cheers,
Andrew.

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


> Hi,

> 

> We found a quite dynamic example for the B(f) case,

> 

> Jorge Lois & Roberto Osorio

> rsbqkbsr/p1p2ppp/8/1PK5/2R5/3P1Q2/1PPP1PPP/1SB2BSR

> 20 single moves.	16 + 13

> 

> The task definition, PGs and status are updated downstream. Still

> pending candidates

> for some dynamyc records. In addition, some of the present records

> can surely

> be inproved.

> 

> This presentation is still asking for absolute records (despiting the

> king

> position) for each case. 

> 

> It's specially challenging the N(g)K(f) case. The material record is

> posible

> (from the material point of view) to be (2,m,c), but then 3 pieces

> have to be

> in contact with the mated king. We got it (3,27,5). Some better

> version?

> 

> On the other hand, a present material record includes a Pronkin. It

> would be

> really surprising that finally a PG including a Pronkin were a

> record.

> 

> Roberto Osorio

> 

> 

> 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 21st 2006)

> 

> ...........MATERIAL TASK......................DYNAMIC TASK

>

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

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

>

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

> R(h)....-.(1,14,2)..Andrew Buchanan           

>

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

> R(a),,,,-.(1,18,2)..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.........(3,20,0).J.Lois &

> R.Osorio

>

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

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

>

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

> Q(sD)...-.(2,20,2)..R.Osorio & J.Lois

>

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

> 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)..

>

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

> 

> 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)     (1,14,2)  Andrew Buchanan

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

> 

> R(a)     (1,18,2)  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

> 

> Q(sD)    (2,20,2)  Roberto Osorio & Jorge Lois

>                    rsbqkbsr/pp1p1ppp/8/KB6/P7/4PS2/1PP2PPP/1SBQ3R

> 

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

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

> 

> B(f)     (3,20,0)  Jorge Lois & Roberto Osorio

>                    rsbqkbsr/p1p2ppp/8/1PK5/2R5/3P1Q2/1PPP1PPP/1SB2BSR

> 

> 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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