[Retros] Last move Type D - record list 03.03.2007

[andrew buchanan]

Hi Folks,

Thanks to Mario for all his work.

Using some freeware (Fancy) and a spreadsheet program I have put together
(which I have named Schmancy haha), I have thrown all the Type A-D problems
together onto my website.

Look for the bits labelled NEW on www.geocities.com/anselan/chess.html.

Cheers,
Andrew.

-----Original Message-----
From: retros-bounces at janko.at [mailto:retros-bounces at janko.at] On Behalf Of
Mario Richter
Sent: 03 March 2007 09:29
To: retros at janko.at
Subject: [Retros] Last move Type D - record list 03.03.2007

Dear retrofans,

below is the current list of records for Lastmovers Type D.

Some premilary remarks:

To keep the list a little bit shorter, the following
abbreviations are used:

rml         = Retros Mailing List,
fs 64       = feenschach, Heft 64/1983, p.29ff
rcv: <date> = the date, on which I received problems which were
              communicated to me via private email

Note, that the last move combinations are normalized for
ordering purposes, i.e. even if White's last move was e.g.
 NxR, and Black's last move was K-, this is not listed as
'NxR/K-', but as 'K-/NxR', the order used is K>Q>R>B>N>P
and '-' > 'x'.

Some comments on new entries:

Please notice, that - surprisingly - Werner Keym has managed
to construct a Type D problem with queenside castling.

With their PxN=B/PxN=B postion, Roberto & Jorge have provided
a special record:
Both Theodore Hwa's 'retractor' program as well as my own
retro program think, that both sides have 20 legal last moves.
So the difference between the number of legal retractions and
the number of retractions as computed by a retro program in this
case is 38. (This difference can be used as an indicator of
the depth of retro-analytical content of a problem ...)

Andrew has given an example (given here separately), which shows,
that the Dead Reckoning Logic can be applied to Type D problems
too:

KxB/P-/14|8/8/8/8/8/5PpP/1PPPP1Pp/2BQRK1k
         |Andrew Buchanan|rml 03.03.2007 (rcv:26.02.3007)

Furthermore, Andrew has established a website, where you can find
the record list including diagrams of the positions:
http://www.geocities.com/anselan/TypeD/TypeD.html

Now the current list. We now have:
 60 records (out of 1770 theoretically possible)
 21 records with both last moves of the same nature (out of 59
theor.possible)
 21 records with 12 or less pieces


As last week, my invitation: In all categories there is still
much room for new records as well as improvements of existing
ones - so please contribute!
(It would be really nice to have at least a complete list of
'same nature last move problems ...)





K-/K-/17|5knn/4ppb1/5pRb/6p1/8/8/PPPP1PP1/K7
        |Wolfgang Dittmann|fs 64
K-/KxN/15|1nk2KBn/1prppRpp/p1p2p2/8/8/8/8/8
         |Mario Richter|rml 23.02.2007
K-/Q-/19|6nn/4ppqk/5prb/6p1/8/8/PPPPPPPP/7K
        |Bernd Schwarzkopf|fs 64
K-/R-/19|5bnn/4ppr1/5pRb/6p1/8/5P2/PPPPP1P1/k1K5
        |Wolfgang Dittmann|fs 64
K-/B-/17|6nn/4ppbk/5pRb/6p1/8/8/PPPP1PP1/K7
        |Wolfgang Dittmann|fs 64
K-/N-/9|5K1N/3prppk/4p2p/8/8/8/8/8
       |Mario Richter|rml 18.02.2007
K-/NxR/11|8/8/8/8/8/5PPP/3PPKbk/4Bn1B
         |Mario Richter|rml 23.02.2007
K-/P-/13|K4nkn/pp1p1prp/2p1p1p1/8/8/8/8/8
        |Günter Büsing, Günter Lauinger, W.Dittmann, B.Schwarzkopf|fs 64
K-/P--/21|6nk/1P2p2p/BRPPPP1P/1ppppppK/8/8/1P1P4/8
         |Bernd Schwarzkopf|fs 64
K-/PxN/11|8/8/8/8/8/1PPP4/KpPRP3/Bnk5
         |Mario Richter|rml 18.02.2007
K-/P-=B/11|3BrbR1/2p1pKpk/4p2p/8/8/8/8/8
          |Mario Richter|rml 03.03.2007
KxQ/KxN/13|2bbk2K/pppprp1p/4p1p1/8/8/8/8/8
          |Andrew Buchanan,Bernd Schwarzkopf|rml 23.02.2007
KxB/KxN/12|8/8/8/8/8/3P1P2/1PPRPrPP/2B1k2K
          |Bernd Schwarzkopf|S2 Problemkiste 153 (June 2004), p. 532
KxB/P-/11|4B2q/1ppppK1k/5ppp/8/8/8/8/8
         |Mario Richter|rml 03.03.2007
KxN/KxN/10|8/8/8/8/8/4P3/2PPRPPP/3BK2k
          |Bernd Schwarzkopf|fs 64
KxN/NxQ/15|rk2NRB1/prpppKpp/1p3p2/8/8/8/8/8
          |Bernd Schwarzkopf|rml 23.02.2007
KxN/NxR/8|RNk5/Kppp4/p7/8/8/8/8/8
         |U. Grinblat|problem November 1957
KxN/NxN/15|8/8/8/8/6PP/5PRQ/1P1PPRRB/4Knrk
          |Bernd Schwarzkopf |rml 23.02.2007
KxN/P-=B/9|8/8/8/8/8/8/kPPP1P2/bRK1b3
          |Hans Gruber, Bernd Schwarzkopf|fs 64
KxN/PxB=R/13|2bk1bRK/1pppp1pR/5p1p/8/8/8/8/8
            |Bernd Schwarzkopf, Werner Keym|rml 23.02.2007
KxN/PxB=N/13|2bk1bNK/1pppp1pR/5p1p/8/8/8/8/8
            |Bernd Schwarzkopf, Werner Keym|rml 23.02.2007
Q-/Q-/15|3BQ1qk/2pRPbrB/3ppKpp/8/8/8/8/8
        |Bernd Schwarzkopf|fs 64
Q-/R-/15|3BQ1rk/2pRPbrB/3ppKpp/8/8/8/8/8
        |Bernd Schwarzkopf|fs 64
Q-/B-/15|8/8/8/8/6P1/3PPkrP/2PPprbb/4KQ1N
        |Bernd Schwarzkopf|rml 23.02.2007
Q-/BxN/14|8/8/8/8/8/3PPkPP/2PPpBbb/4K1Qn
         |Bernd Schwarzkopf|rml 03.03.2007 (rcv:01.03.2007)
QxN/QxN/12|8/8/8/8/8/6P1/PPPP1PRP/q1QK1k2
          |Bernd Schwarzkopf|fs 64
QxN/RxN/12|8/8/8/8/8/6P1/PPPP1PRP/r1QK1k2
          |Bernd Schwarzkopf|fs 64
R-/R-/15|3BR1rk/2pRPbrB/3ppKpp/8/8/8/8/8
        |Bernd Schwarzkopf|fs 64
R-/B-/15|8/8/8/8/6P1/3PPkrP/2PPprbb/4KR1N
        |Bernd Schwarzkopf|rml 23.02.2007
R-/N-/13|8/8/8/8/7P/4PPkr/3PP1bR/4bRKn
        |Bernd Schwarzkopf|fs 64
RxN/RxN/9|8/8/8/8/8/P7/KPkPP3/R1rb4
         |Bernd Schwarzkopf|fs 64
RxN/B-/10|8/8/8/8/1P6/kPP5/bRrP4/K1B5
         |Günter Eder, Günter Büsing, Hans Peter Rehm, Hemmo Axt|fs 64
B-/B-/17|8/8/8/8/8/3PPPPP/1PPrR1RB/2brBkbK
        |Bernd Schwarzkopf|fs 64
B-/BxN/14|3BbKBk/2ppr1rb/4pppp/8/8/8/8/8
         |W. Dittmann, Hans Gruber, Günter Büsing, B. Schwarzkopf|fs 64
B-/N-/11|3Bb1kN/2ppK1pp/3p2p1/8/8/8/8/8
        |Bernd Schwarzkopf|fs 64
BxR/BxR/11|4BB1b/3pRK1k/4pppp/8/8/8/8/8
          |Mario Richter|rml 03.03.2007
BxR/PxN=Q/10|4BQ1b/3ppK1k/5ppp/8/8/8/8/8
            |Mario Richter|rml 03.03.2007
BxN/BxN/13|3BBKbk/2ppr1rb/4ppp1/8/8/8/8/8
          |W. Dittmann, Hans Gruber, Günter Büsing, B. Schwarzkopf|fs 64
N-/N-/12|8/8/8/8/8/3PP3/kPPRrP2/NbnK4
        |Bernd Schwarzkopf|fs 64
N-/P--/22|6bN/1P3p1k/BrPPPP2/1ppppppK/7p/8/1PP4P/8
         |Bernd Schwarzkopf|fs 64
N-/PxN/13|8/8/8/8/8/P2PP3/pPPrRP2/KBNk4
         |Bernd Schwarzkopf|fs 64
N-/P-=B/13|8/8/8/8/8/1PPP4/nPKP1P2/kBNRb3
          |Bernd Schwarzkopf |rml 23.02.2007
NxR/PxN=R/13|8/8/8/8/8/2PPP3/P1PKRPP1/rk1NB3
            |W.Dittmann, H.Gruber, Günter Büsing, B. Schwarzkopf|fs 64
NxN/P--/26|qbbB1KN1/pprkrBp1/2ppp1p1/7p/8/1P2P3/P1PP1PPP/8
          |Bernd Schwarzkopf |rml 23.02.2007
P-/P-/8|8/8/8/8/8/4P1P1/3Prp1P/5K1k
       |Wolfgang Dittmann|fs 64
P-/P-=B/9|8/8/8/8/8/6P1/2P1PP1P/3bRK1k
         |Bernd Schwarzkopf|fs 64
P-/P-=N/11|8/8/8/8/8/5P1P/1PP1PRP1/nRK1k3
          |Bernd Schwarzkopf|fs 64
P-/PxQ=N/13|8/8/8/8/8/P4P1P/1PPPPRP1/2Bk1Kn1
           |Werner Keym|rml 24.02.2007
P--/P--/20|8/p1pp1p2/p6P/rP4pK/kP4pR/p6P/2P1PP1P/8
          |Bernd Schwarzkopf |rml 23.02.2007
P-=B/P-=B/10|K1krB3/p1pp1p2/8/8/8/8/6P1/7b
            |Andrew Buchanan|rml 19.02.2007
P-=N/P-=N/16|Nrk5/1ppRp3/3p4/8/8/4P3/3PrPP1/5KRn
            |Andrew Buchanan|rml 19.02.2007
P-=Q/P-=Q/20|5bnQ/4prB1/5pkP/6p1/6P1/5PKp/4PRb1/5BNq
            |Andrew Buchanan|rml 03.03.2007 (rcv:26.02.2007)
P-=R/P-=R/20|Rnb5/1kpp4/brp5/1p6/6P1/5PRP/4PRK1/5BNr
            |Andrew Buchanan|rml 19.02.2007
PxR=R/PxR=R/20|5bRq/3pp1pk/6pp/8/8/3P2PP/1PP1P1PK/5BrQ
              |Roberto Osorio & Jorge Lois|rml 25.02.2007
PxB=R/PxB=R/16|5bRK/4p1pR/5p1p/8/8/5P1P/4P1Pr/5Brk
              |Werner Keym|rml 24.02.2007
PxB=R/PxB=N/16|5bRK/4p1pR/5p1p/8/8/5P1P/4P1Pr/5Bnk
              |Werner Keym|rml 24.02.2007
PxB=N/PxB=N/16|5bNK/4p1pR/5p1p/8/8/5P1P/4P1Pr/5Bnk
              |Werner Keym|rml 24.02.2007
PxN=B/PxN=B/24|2brrkBQ/1p1pp1pp/6p1/8/8/1P6/PP1PP1P1/qbKRRB2
              |Roberto Osorio & Jorge Lois|rml 25.02.2007
PxN=R/PxN=R/18|nRK5/1pprp3/1p1p4/8/8/4P1P1/3PRPP1/5krN
              |Roberto Osorio & Jorge Lois|rml 25.02.2007
0-0-0/K-/17|8/p7/8/8/8/1P1PkPP1/bPPR1RPN/2KR1QB1
           |Werner Keym|rml 03.03.2007 (rcv:25.02.2007)


Regards,

   mario


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