The Retrograde Analysis Corner

What was the Last Move?

For each move type, e.g. plain moves, capturing moves, etc.: What is the smallest number of pieces such that the last move is uniquely determined?

Type D: One solution assuming White has the move, another one solution assuming Black has the move

It is clear that the more the list is filled, the more difficult it gets to find new positions or to improve existing ones.

To give you some appetizer, I've included some of my own positions with 13-15 pieces which I wasn't able to reduce to 12 or less pieces. Maybe one of you can do a better job with those?!

We now have:

161 records
52 records, where both last moves are of the same nature (these are called Type DD positions)
51 records with 12 or less pieces

missing DD-positions:

QxQ QxR QxB RxR PxR=Q

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

rml = Retros Mailing List,

feenschach 64 = feenschach, Heft 64/1983, p.29ff

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'.
To be compatible with Andrew Buchanan's website (see below), the ordering used both within on move pair as well as between move pairs is the same as for Type A-C.

Thanks to the efforts of Andrew Buchanan you can also view this list in a nice graphical manner on Andrew's webpage http://www.geocities.com/anselan/TYPE-D/TYPE-D.html (Andrew also presents lists of records of other last move types, as well as some other interesting retro questions - especially about 'Dead Reckoning', so you should visit his website http://www.geocities.com/anselan/chess.html in any case.)

In the following list, entries marked red, indicate new records since 09.05.2007.

Mario Richter

Record List

Type D: One solution assuming White has the move, another one solution assuming Black has the move

K-/K-/12	BK6/Bpp5/1p6/8/8/1P6/bPP5/bk6	Andrew Buchanan	rml 05.04.2007
K-/KxN/13	k2KRn1n/pppppp1p/6p1/8/8/8/8/8	Andrew Buchanan	rml 10.04.2007
K-/Q-/15	n1K5/k1pp4/Pp6/1p6/qP6/pP6/p1PP4/8	Werner Keym	rml 10.04.2007
K-/R-/14	k7/Pppp4/rp6/1K6/1P6/pP6/p1PP4/8	Werner Keym	rml 10.04.2007
K-/B-/13	k7/P1pp4/Pp6/1p6/8/1P6/bPPP4/2K5	Werner Keym	rml 10.04.2007
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/3PPKpk/4Bn1B	Mario Richter	rml 09.05.2007
K-/P-/11	8/1p6/p7/8/8/PP6/1PkPP3/KR1b4	Werner Keym	rml 17.04.2007
K-/PxQ/17	8/7p/7p/8/8/PP4P1/1PkPPP1P/KR1bRN1N	Werner Keym	rml 09.05.2007
K-/PxN/11	8/8/8/8/8/1PPP4/KpPRP3/Bnk5	Mario Richter	rml 18.02.2007
K-/PxN=Q/11	8/8/8/8/7P/5PPR/3PPk1K/4bqr1	Werner Keym	rml 02.04.2007
K-/PxN=R/16	5bKR/4p1pR/5p1p/8/7P/6P1/4P1Pk/5Brr	Andrew Buchanan, Werner Keym	rml 28.03.2007
K-/P-=B/11	8/8/8/8/8/PP6/1PkPP1P1/KR1b1b2	Werner Keym	rml 17.04.2007
K-/P--/15	7k/3pp1pP/6PP/5pKp/7B/6P1/4PP1p/8	Bernd Schwarzkopf, Werner Keym	rml 12.03.2007
K-/0-0-0/17	8/p7/8/8/8/1P1PkPP1/bPPR1RPN/2KR1QB1	Werner Keym	rml 03.03.2007
K-/0-0/19	8/5ppp/8/8/6P1/3PkPPp/1PPR1RPr/2BQ1RK1	Werner Keym, Bernd Schwarzkopf	rml 04.03.2007
KxQ/KxQ/24	nnrNK2k/Bbrpp2p/ppp5/8/8/1P6/P1PPPPPP/N7	Bernd Schwarzkopf, Werner Keym	rml 10.04.2007
KxQ/KxN/13	2bbk2K/pppprp1p/4p1p1/8/8/8/8/8	Andrew Buchanan,Bernd Schwarzkopf	rml 23.02.2007
KxR/KxR/22	nBqb4/K1Bpp3/1ppp4/8/8/1PPP4/k1bPP3/NbQB4	Jorge Lois & Roberto Osorio	rml 16.03.2007
KxR/B-/11	8/8/8/8/8/1PPP4/k1KPP3/BnQB4	Jorge Lois & Roberto Osorio	rml 16.03.2007
KxB/KxB/14	4B2q/3ppKpp/8/8/8/8/PPkPP3/Q2b4	Werner Keym	rml 04.03.2007
KxB/KxN/12	8/8/8/8/8/3P1P2/1PPRPrPP/2B1k2K	Bernd Schwarzkopf	S2 Problemkiste 153 (June 2004), p. 532
KxB/R-/9	8/8/8/8/8/PP6/KPkPP3/R2b4	Mario Richter	rml 17.03.2007
KxB/P-/10	3B2qk/2ppKppp/p7/8/8/8/8/8	Werner Keym	rml 04.03.2007
KxB/P-=B/10	8/8/8/8/8/P7/KPkPP1P1/2qb1b2	Mario Richter	rml 12.03.2007
KxN/KxN/10	8/8/8/8/8/4P3/2PPRPPP/3BK2k	Bernd Schwarzkopf	feenschach 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/PxB=R/13	2bk1bRK/1pppp1pR/5p1p/8/8/8/8/8	Bernd Schwarzkopf, Werner Keym	rml 23.02.2007
KxN/PxN=R/13	8/8/8/8/8/2P2P1P/PP1PPRP1/K1Brk3	Werner Keym, Bernd Schwarzkopf	rml 02.04.2007
KxN/P-=B/9	8/8/8/8/8/8/kPPP1P2/bRK1b3	Hans Gruber, Bernd Schwarzkopf	feenschach 64
KxN/PxB=N/13	2bk1bNK/1pppp1pR/5p1p/8/8/8/8/8	Bernd Schwarzkopf, Werner Keym	rml 23.02.2007
KxP/KxP/24	4bb2/2pppkpP/6Rb/6rQ/5KRp/4PbB1/1P2PrPN/5B2	Werner Keym	rml 17.04.2007
Q-/Q-/13	8/8/8/8/1P6/kPPP4/qRbrP3/1QKB4	Thierry LE GLEUHER	rml 04.03.2007
Q-/R-/13	8/8/8/8/1P6/kPPP4/rRbrP3/1QKB4	Thierry LE GLEUHER	rml 04.03.2007
Q-/B-/13	8/8/8/8/1P6/kPPP4/brrRP3/K1QB4	Thierry LE GLEUHER	rml 04.03.2007
Q-/BxN/14	8/8/8/8/8/3PPkPP/2PPpBbb/4K1Qn	Bernd Schwarzkopf	rml 03.03.2007
Q-/N-/13	8/8/8/8/1P6/kPPP4/nRbrP3/KQ1B4	Thierry LE GLEUHER	rml 10.03.2007
Q-/P-/13	8/6p1/7p/8/8/4PPPk/3PPprb/5KQ1	Werner Keym	rml 09.05.2007
Q-/P-=Q/14	4bKQq/3prB2/4pRPk/5ppp/8/8/8/8	Mario Richter	rml 09.05.2007
Q-/P-=B/12	8/8/8/8/8/4PPPk/2P1PprP/3b1K1Q	Werner Keym	rml 11.12.2007
Q-/0-0-0/20	8/8/8/8/5PP1/1PPPkrqB/bPPR1rPN/2KR1QB1	Werner Keym, Bernd Schwarzkopf	rml 04.03.2007
Q-/0-0/22	8/5ppp/8/8/4PPP1/2PPkrqp/1PrR1RPr/2BQ1RK1	Werner Keym, Bernd Schwarzkopf	rml 04.03.2007
QxQ/P-=B/21	n1b5/1ppp4/1p6/8/8/3P2PP/1PPkPPRr/bQ3QKn	Jorge Lois & Roberto Osorio	rml 17.03.2007
QxR/RxN/15	8/8/8/8/8/3PPPP1/1PPrBKPk/2Br1Q1N	Werner Keym	rml 11.12.2007
QxB/R-/18	8/8/8/8/8/2P1PPPP/PPRbPK1p/1BRr1QNk	Werner Keym	rml 11.12.2007
QxN/QxN/12	8/8/8/8/8/6P1/PPPP1PRP/q1QK1k2	Bernd Schwarzkopf	feenschach 64
QxN/RxN/12	8/8/8/8/8/6P1/PPPP1PRP/r1QK1k2	Bernd Schwarzkopf	feenschach 64
QxN/PxN=R/13	8/8/8/8/8/3P1P2/PP1PPRP1/KQBrk3	Werner Keym, Bernd Schwarzkopf	rml 02.04.2007
QxP/QxP/26	6nK/3ppp1Q/5Pqr/5prB/5Pbn/4PrrR/3PRQRq/4B2k	Werner Keym	rml 25.07.2007
R-/R-/13	8/8/8/8/1P6/kPPP4/rRbrP3/1RKB4	Thierry LE GLEUHER	rml 04.03.2007
R-/RxR/19	2bq2rr/1pppRK1P/4pRPk/5ppp/8/8/6PP/8	Werner Keym	rml 11.12.2007
R-/B-/13	8/8/8/8/1P6/kPPP4/brrRP3/K1RB4	Thierry LE GLEUHER	rml 04.03.2007
R-/N-/13	8/8/8/8/7P/4PPkr/3PP1bR/4bRKn	Bernd Schwarzkopf	feenschach 64
R-/P-/11	8/1p6/p7/8/8/kPP5/b1PP4/KRb5	Mario Richter	rml 12.03.2007
R-/P-=Q/14	rQn5/2PPpp2/kPKpp3/p1p5/8/8/8/8	Mario Richter	rml 09.05.2007
R-/P-=B/11	8/8/8/8/8/kPP5/b1PP1P2/KRb1b3	Mario Richter	rml 12.03.2007
R-/0-0-0/19	8/p7/8/8/8/1PPPkPP1/bPPR1rPB/2KR1nQN	Werner Keym	rml 04.03.2007
R-/0-0/21	8/5p1p/6p1/8/5PP1/2PPkrPp/1PRr1RPr/2BQ1RK1	Werner Keym	rml 04.03.2007
RxQ/RxQ/17	8/1p1p4/8/8/8/P1P1P2P/rP1PRPP1/kr1RKB2	Roberto Osorio & Jorge Lois	rml 31.03.2007
RxB/RxB/18	8/5p1p/8/8/8/P3P1P1/rPPPRP1P/Qqk1KR1r	Roberto Osorio & Jorge Lois	rml 31.03.2007
RxN/RxN/9	8/8/8/8/8/P7/KPkPP3/R1rb4	Bernd Schwarzkopf	feenschach 64
RxN/B-/10	8/8/8/8/1P6/kPP5/bRrP4/K1B5	Günter Eder, Günter Büsing, Hans Peter Rehm, Hemmo Axt	feenschach 64
RxP/RxP/26	5bbr/2ppppnB/5p1K/5P1R/5Pqr/4PrQR/3PRQ1r/4B2k	Werner Keym	rml 25.07.2007
B-/B-/12	8/8/8/8/PP6/pkPP4/b1prP3/B1K5	Thierry LeGleuher	rml 19.03.2007
B-/BxN/14	3BbKBk/2ppr1rb/4pppp/8/8/8/8/8	W. Dittmann, Hans Gruber, Günter Büsing, B. Schwarzkopf	feenschach 64
B-/N-/11	3Bb1kN/2ppK1pp/3p2p1/8/8/8/8/8	Bernd Schwarzkopf	feenschach 64
B-/P-/11	8/6p1/7p/8/8/P2P4/P1kPP3/K1Bb4	Mario Richter	rml 11.12.2007
B-/P-=R/14	bRr1B3/k1pKpp2/ppp5/8/8/P7/1P6/8	Mario Richter	rml 09.05.2007
B-/P-=B/11	8/8/8/8/8/P2P4/P1kPP1P1/K1Bb1b2	Werner Keym	rml 15.03.2008
B-/0-0-0/19	8/p7/8/8/5P2/1PPPkrb1/bPPR1RPN/2KR1QB1	Werner Keym, Bernd Schwarzkopf	rml 04.03.2007
B-/0-0/17	8/8/8/8/6P1/2PPkPPB/1PrR1RPr/2Bb1RK1	Werner Keym	rml 04.03.2007
BxQ/BxQ/24	8/1p2p2p/8/8/7P/P1PP1PPR/P1PkpKpp/B1brnRnr	Roberto Osorio, Jorge Lois, Werner Keym	rml 10.04.2007
BxR/BxR/11	4BB1b/3pRK1k/4pppp/8/8/8/8/8	Mario Richter	rml 03.03.2007
BxR/N-/14	5k1K/3pRP1b/4pRqN/5prb/6p1/8/8/8	Mario Richter	rml 09.05.2007
BxR/PxN=Q/10	4BQ1b/3ppK1k/5ppp/8/8/8/8/8	Mario Richter	rml 03.03.2007
BxB/BxB/27	7n/ppp1pp1p/2p3p1/8/8/2PPPP2/1PRQqrP1/kBRNnrbK	Roberto Osorio & Jorge Lois	rml 23.03.2007
BxN/BxN/11	4BbnB/3ppK1k/4pp1p/8/8/8/8/8	Mario Richter	rml 19.03.2007
BxN/N-/11	8/8/8/8/8/PP1P4/1PkrP3/KbNb4	Mario Richter	rml 15.03.2008
BxN/P-/14	4B1rb/1p1pRKBk/p3pppp/8/8/8/8/8	Mario Richter	rml 11.12.2007
BxN/PxN=Q/10	8/8/8/8/8/5P1P/3PPk1K/4bqnB	Mario Richter	rml 12.03.2007
BxN/PxN=R/10	8/8/8/8/8/5P1P/3PPk1K/4brnB	Mario Richter	rml 12.03.2007
BxN/P-=B/12	8/8/8/8/8/3P1P1P/2PrPP1k/4KRbB	Mario Richter	rml 09.05.2007
BxN/P-=N/11	4BbNr/3ppK1k/4pp1p/8/8/8/8/8	Mario Richter	rml 10.04.2007
BxN/0-0-0/21	8/1p6/8/8/5PP1/1PPPkrrB/brPR1RPN/2KR1QB1	Werner Keym	rml 04.03.2007
BxP/BxP/26	5bnK/3ppp2/5PqB/5pBr/5PbR/4PrQb/2PPRQ2/4bB1k	Werner Keym	rml 17.04.2007
N-/N-/11	8/8/8/8/8/P2P4/KPkPP3/nnNb4	Andrew Buchanan	rml 16.03.2007
N-/P-/11	8/1p6/p7/8/8/3P4/PPkPP3/K1Nb4	Werner Keym	rml 09.05.2007
N-/PxN/10	8/8/8/8/8/P2P4/pPkPP3/K1Nb4	Werner Keym	rml 17.04.2007
N-/PxN=R/11	8/8/8/8/8/4P1P1/2P1PkPP/3brN1K	Werner Keym	rml 02.04.2007
N-/P-=B/11	8/8/8/8/8/3P4/PPkPP1P1/K1Nb1b2	Werner Keym	rml 09.05.2007
N-/P--/21	6bN/1P3p1k/BrPPPP2/1ppppppK/7p/8/1PP5/8	Bernd Schwarzkopf	feenschach 64
N-/0-0-0/19	8/pp6/8/8/8/1PPPkPP1/bPPR1rPn/2KR1QB1	Werner Keym, Bernd Schwarzkopf	rml 04.03.2007
N-/0-0/23	7n/1p3ppp/8/8/6PN/2PPkPPp/1PrR1RPr/2bQ1RK1	Werner Keym, Bernd Schwarzkopf	rml 04.03.2007
NxQ/NxQ/17	8/3p4/8/8/8/2P1P3/PPRPrPPP/k1KRrn1N	Roberto Osorio & Jorge Lois	rml 10.04.2007
NxR/NxR/16	2brn1Nb/1ppRKpkB/3pp1pp/8/8/8/8/8	Mario Richter	rml 09.05.2007
NxR/PxN=R/12	8/8/8/8/8/6PP/1P1PP1PK/2BRrk1N	Werner Keym	rml 17.04.2007
NxR/P-=B/12	8/8/8/8/8/1PPP4/nPKP1P2/k1NRb3	Mario Richter	rml 19.03.2007
NxB/NxB/19	8/5p2/8/8/8/PP2P3/pP1PrPPP/KNBnrkqQ	Roberto Osorio & Jorge Lois	rml 10.04.2007
NxN/NxN/17	8/8/8/8/8/P1P5/RPrPPPPk/KBnbNQR1	Roberto Osorio, Jorge Lois, Andrew Buchanan	rml 28.03.2007
NxN/P--/26	qbbB1KN1/pprkrBp1/2ppp1p1/7p/8/1P2P3/P1PP1PPP/8	Bernd Schwarzkopf	rml 23.02.2007
NxN/0-0/24	8/1p2pppp/p3p2B/6n1/6P1/4kPPB/1PPR1RPr/2BQ1RK1	Werner Keym	rml 12.03.2007
NxP/NxP/25	6nK/1p1ppp1N/5Pqr/5prb/5PrR/4PRQn/3PRQ2/4B2k	Werner Keym	rml 09.05.2007
NxP/P-/17	5k1K/3pRP2/p3prqN/5prr/6pr/7b/6P1/8	Werner Keym	rml 17.04.2007
P-/P-/8	8/8/8/8/8/4P1P1/3Prp1P/5K1k	Wolfgang Dittmann	feenschach 64
P-/PxB/11	8/8/8/8/1P6/b1P5/pPrPP3/K1kB4	B.Schwarzkopf, W.Keym & A.Buchanan	rml 04.04.2007
P-/PxN/11	8/8/8/8/8/P1P1P3/pP1PrP2/bk1K4	Werner Keym	rml 11.12.2007
P-/PxQ=Q/15	8/8/8/8/P7/1PPP4/b1KRPPPP/q1N1kB2	Werner Keym	rml 02.04.2007
P-/PxR=Q/16	8/8/8/8/1P6/4PPPP/1PPPrk1K/2BRrq1Q	Werner Keym	rml 11.12.2007
P-/PxN=Q/11	8/8/8/8/7P/5PPR/3PPk1K/4bq1n	Werner Keym	rml 02.04.2007
P-/P-=R/14	bRr1B3/k1pKpp1p/ppp3p1/8/8/8/8/8	Mario Richter	rml 09.05.2007
P-/PxN=R/12	8/8/8/8/7P/5PPR/3PPk1K/4brnn	Werner Keym	rml 02.04.2007
P-/P-=B/9	8/8/8/8/8/6P1/2P1PP1P/3bRK1k	Bernd Schwarzkopf	feenschach 64
P-/P-=N/11	8/8/8/8/8/5P1P/1PP1PRP1/nRK1k3	Bernd Schwarzkopf	feenschach 64
P-/PxQ=N/13	8/8/8/8/8/P4P1P/1PPPPRP1/2Bk1Kn1	Werner Keym	rml 24.02.2007
P-/PxN=N/11	8/8/8/8/8/5P2/P1PPP1P1/k1KRnB2	Werner Keym	rml 28.03.2007
P-/P--/13	8/3ppp1p/7P/6pK/8/5PPk/4P1pp/8	Bernd Schwarzkopf	rml 06.03.2007
P-/0-0-0/18	8/P2pp3/1pp3p1/8/PP6/pkPP4/pB1P2P1/2KR4	Werner Keym	Koenig & Turm May 2007
P-/0-0/18	8/2p1p2P/5pp1/7P/6Pp/P3PPkp/1P2PR2/5RK1	Werner Keym	Koenig & Turm May 2007
PxQ/PxQ/24	4BKBn/3ppRBP/5p1p/6p1/1P6/P1P5/pbrPP3/Nbkb4	Bernd Schwarzkopf	rml 03.04.2007
PxQ/0-0/23	8/p2pppp1/8/5p2/6P1/2PPkPPB/1PrR1RPr/2bn1RK1	Roberto Osorio & Jorge Lois	rml 12.03.2007
PxR/PxR/21	kB3b2/ppP1p1p1/2pp4/8/8/2PP2P1/PPp1P1P1/Kb3B2	Andrew Buchanan	rml 02.04.2007
PxB/PxB/16	8/Pp2p3/kpp5/p7/P7/KPP3P1/pP2P2P/8	Andrew Buchanan	rml 02.04.2007
PxB/0-0-0/19	8/P1pp3p/1p6/Bp6/PP6/pkPP4/qB1P2P1/2KR4	Werner Keym	Koenig & Turm May 2007
PxB/0-0/18	8/4pp1P/6p1/6pb/5PPR/4PPkp/1P2PR2/5RK1	Werner Keym	Koenig & Turm May 2007
PxN/PxN/16	6BK/1p1p1ppP/7p/8/8/P7/pPP1P1P1/kb6	Jorge Lois & Roberto Osorio	rml 31.03.2007
PxN/0-0-0/20	8/7p/7p/8/8/1PPPkPP1/bPPR1rPb/2KR1nQb	Werner Keym	rml 04.03.2007
PxN/0-0/17	8/8/8/8/6P1/2PPkPPB/1PpR1RPr/2BQ1RK1	Werner Keym, Bernd Schwarzkopf	rml 04.03.2007
PxP/PxP/17	8/ppp3P1/2pp4/8/4P3/7P/p1PPPkPK/4bq2	Werner Keym	Die Schwalbe 225 (June 2007)
PxP/0-0-0/20	N7/P1pp1p1p/pp5p/8/P7/PkPP4/pB1P2P1/2KR4	Werner Keym	Koenig & Turm May 2007
PxP/0-0/20	8/p3pp1P/p5p1/7P/5PPp/4PRpk/1P2PB1N/5RK1	Werner Keym	Koenig & Turm May 2007
P-=Q/P-=Q/20	5bnQ/4prB1/5pkP/6p1/6P1/5PKp/4PRb1/5BNq	Andrew Buchanan	rml 03.03.2007
PxQ=Q/PxQ=Q/24	1Qrb4/1Prpp3/krp5/pp6/6PP/5PRK/3PPRp1/4BRq1	Andrew Buchanan	rml 28.03.2007
PxB=Q/PxB=Q/26	4nQrQ/2pp1ppK/2pp4/8/8/PP6/b1PPkPP1/nN1brqqN	Roberto Osorio & Jorge Lois	rml 25.07.2007
PxN=Q/PxN=Q/23	4nQQB/2pp1ppK/3p4/8/8/5P2/PPPPkrP1/3bbqqN	Roberto Osorio & Jorge Lois	rml 25.07.2007
P-=R/P-=R/20	Rnb5/1kpp4/brp5/1p6/6P1/5PRB/4PPK1/5BNr	Andrew Buchanan	rml 12.03.2007
P-=R/P-=B/14	bRr1B3/k1pKpp2/ppp5/8/8/8/6P1/7b	Mario Richter	rml 09.05.2007
PxQ=R/PxQ=R/23	nRr1n3/1ppKp1p1/1p1pp3/8/8/3PP3/1P1PkPP1/3N1RrN	Osorio/Lois/Buchanan	rml 17.04.2007
PxR=R/PxR=R/20	5bRq/3pp1pk/6pp/8/8/1P4PP/2PPP1PK/5BrN	Roberto Osorio/Jorge Lois/Werner Keym/Andrew Buchanan	rml 09.05.2007
PxB=R/PxB=R/16	5bRK/4p1pR/5p1p/8/8/5P1P/4P1Pr/5Brk	Werner Keym	rml 24.02.2007
PxB=R/PxN=R/15	KRb5/Rp1p4/p1p5/8/8/6P1/4P1Pk/5Brb	Andrew Buchanan	rml 28.03.2007
PxB=R/PxB=N/16	5bRK/4p1pR/5p1p/8/8/5P1P/4P1Pr/5Bnk	Werner Keym	rml 24.02.2007
PxN=R/PxN=R/14	BRb5/Kp1p4/1p6/8/8/6P1/4P1Pk/5Brb	Andrew Buchanan	rml 28.03.2007
PxN=R/PxB=N/15	KNb5/Rp1p4/p1p5/8/8/6P1/4P1Pk/5Brb	Andrew Buchanan	rml 28.03.2007
P-=B/P-=B/10	K1krB3/p1pp1p2/8/8/8/8/6P1/7b	Andrew Buchanan	rml 19.02.2007
P-=B/P-=N/12	Nrk1K3/1pp1prp1/5p2/8/8/8/1P6/b7	Mario Richter	rml 12.03.2007
P-=B/0-0-0/21	8/4pp1p/6p1/8/8/1PPPkPP1/brPR1RP1/2KR1Qrb	Werner Keym	rml 04.03.2007
P-=B/0-0/18	8/8/8/8/6P1/2PPkPPB/1PrR1RPr/b1bQ1RK1	Werner Keym, Bernd Schwarzkopf	rml 04.03.2007
PxQ=B/PxQ=B/25	2brkBRB/1p1p1ppK/8/8/8/1P4PN/1P1PNPrr/3bRBbR	Roberto Osorio, Jorge Lois & Werner Keym	rml 09.05.2007
PxR=B/PxR=B/24	NrbbNQBk/1PppBKp1/1p1p1pp1/8/8/8/1PP1P1PP/1b6	Lois & Osorio	rml 17.04.2007
PxB=B/PxB=B/25	2brkBRB/pp1p1ppK/8/8/8/1P6/1P1PNPPN/2BbRQRq	Roberto Osorio & Jorge Lois	rml 09.05.2007
PxN=B/PxN=B/24	2brrkBQ/1p1pp1pp/6p1/8/8/1P6/PP1PP1P1/qbKRRB2	Roberto Osorio & Jorge Lois	rml 25.02.2007
P-=N/P-=N/16	Nrk5/1ppRp3/3p4/8/8/4P3/3PrPP1/5KRn	Andrew Buchanan	rml 19.02.2007
P-=N/0-0-0/22	8/8/8/8/3PPPP1/1PPrkprB/bPPR1Np1/2KR1Qnn	Werner Keym	rml 17.03.2007
PxQ=N/PxQ=N/24	kNb2b2/rp1pppp1/p1p5/8/8/5P1P/1PPPP1PR/2B2BnK	Roberto Osorio & Jorge Lois	rml 03.03.2007
PxQ=N/0-0/19	8/6p1/7p/8/6P1/2PPkPPB/1PrR1RPr/2Bn1RK1	Werner Keym	rml 04.03.2007
PxR=N/PxR=N/24	1NQQB3/1pRKppp1/p1p5/8/8/4P1P1/1PPkrP1P/2bbqn2	Buchanan, Osorio/Lois, Keym	rml 17.04.2007
PxB=N/PxB=N/16	5bNK/4p1pR/5p1p/8/8/5P1P/4P1Pr/5Bnk	Werner Keym	rml 24.02.2007
PxN=N/PxN=N/22	1Nqkrb2/1pppp1p1/p7/8/8/7P/1P1PPPP1/2BRKQn1	R.Osorio, J.Lois & A.Buchanan	rml 28.03.2007
P--/P--/17	8/2pp4/2p2PP1/4pKRP/4ppPk/7p/3PPP2/8	Bernd Schwarzkopf, Werner Keym	rml 28.03.2007