[Retros] TD retros and solutions

[Henrik Juel]

Here are solutions and originals from retro columns in the recent
issues of Thema Danicum. Original retros are most welcome and may be
sent to me, hj at imm.dtu.dk

Henrik
--
Henrik Juel. Informatics and Mathematical Modelling, Building 321,
Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
http://www.imm.dtu.dk/~hj  Phone +45 4525 3391  Fax +45 4593 2373


Solutions for retros from Thema Danicum 108, October 2002:

8870 - Per Grevlund
Intended retroplay: -1.Ke7 Kd7 -2.d5xPep c7, but cooked by -1.Qe7.
Correction: replace wQd8 with wRd8.

8871 - Henrik Juel
-1.Kg7-g8+ Bb4-g8+, 1.Kc3 Be5#. Not -1.Kg7xSg8? since all captures were 
made by pawns, or -1.g7xh8=B? since the 2 extra captures (in addition to 
the 8 captures necessary to promote 16 pawns) created a surplus of white 
bishops on light squares.

8872 - Ivan & Gligor Denkovski
1.c4 e6 2.Qc2 Bd6 3.Qxh7 Bxh2 4.Qxh2 Rh3 5.Sc3 Rxc3 6.f3 Rxc1+ 7.Kf2 
Rxf1+ 8.Kg3 Rxg1 9.Kg4 Rxh1 10.Qg1 Rh8 11.Qd1 Sh6 12.Kh5 a5 13.g4 a4.


Solutions for retros from Thema Danicum 109, January 2003:

8983 - Wolfgang Dittmann
-1.h5xPep g7 -2.Rd8 R~ -3.R=d7, 1.d8Q#.

8984 - Michel Caillaud
1.d4 h5 2.d5 h4 3.d6 h3 4.dxe7 d6 5.exd8=R+ Ke7 6.Rxd6 hxg2 7.Rb6 axb6 
8.h4 Ra4 9.Sh3 Rg4 10.f4 f6 11.Kf2 g1=Q+ 12.Kf3 Qd4 13.Be3 Qd8 14.Sd2 or 
4... hxg2 5.h4 f6 6.Sh3 g1=B 7.exf8=S Bh2 8.Sxd7 Bd6 9.Sb6 axb6 10.Be3 
Ra4 11.Sd2 Rg4 12.f4 Bf8 13.Kf2 Ke7 14.Kf3.

8985 - Gligor Denkovski 
.Sc3 d5 2.Sxd5 Bf5 3.Sc3 Qd3 4.Sb1 Sd7 5.c3 Qc2
6.h4 Qxc1 7.h5 Qc2 8.h6 Qd3 9.Qa4 0-0-0 10.Kd1 dSf6 11.Qe8 Kb8 12.Qxf8
Rc8 13.Qe8 Qd8 14.Qa4 Se8 15.Kc1 gSf6 16.Qd1 Rf8 17.Qe1 Sg8 18.Kd1 f6.


Retro problems from Thema Danicum 109, January 2003:

R6k/7p/8/8/5p2/8/1p4PP/r6K (4+5)

R . . . . . . k    Wolfgang Dittmann
. . . . . . . +    8983 TD 109
. . . . . . . .
. . . . . . . . 
. . . . . + . . 
. . . . . . . . 
. + . . . . o o    Anticirce Cheylan 
r . . . . . . K    Proca retractor, retract 2.5 moves, then #1

1nbq1bnr/1pp1k1p1/1p3p2/8/5PrP/4BK1N/PPPNP3/R2Q1B1R (14+13)

. n b q . b n r    Michel Caillaud
. + + . k . + .    8984 TD 109
. + . . . + . . 
. . . . . . . . 
. . . . . o r o 
. . . . B K . N 
o o o N o . . .    C+
R . . Q . B . R    Proof game in 13.5, 1.1;1.1;1.1;1.2;1..

1krqnrn1/ppp1p1pp/5p1P/5b2/8/2P5/PP1PPPP1/RN1KQBNR (15+14)

. k r q n r n .    Gligor Denkovski
+ + + . + . + +    8985 TD 109
. . . . . + . o 
. . . . . b . . 
. . . . . . . . 
. . o . . . . . 
o o . o o o o .    C+ 
R N . K Q B N R    Proof game in 18.0


Retro problems from Thema Danicum 110, April 2003:

8/kn3p2/8/8/8/8/8/4K3 (1+3)

. . . . . . . .    Wolfgang Dittmann
k n . . . + . .    9075 TD 110
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
. . . . . . . .    Anticirce Cheylan
. . . . K . . .    Proca retractor, retract 6.5 moves, then #1

r1bqkbnr/pppp1ppp/8/4p3/8/8/PPPPPPPP/RNBQKB1R (15+15)

r . b q k b n r    Erik Hansen
+ + + + . + + +    9076 TD 110
. . . . . . . . 
. . . . + . . . 
. . . . . . . . 
. . . . . . . .    C+
o o o o o o o o    Andernach
R N B Q K B . R    Proof game in 4.0, 1.2.1..

1nb2rk1/pp1p3r/n7/8/qQ3P2/R2NPN2/PP1P2PB/KB5R (14+10)

. n b . . r k .    Igor Vereschagin & Rustam Ubaidullaev
+ + . + . . . r    9077 TD 110
n . . . . . . . 
. . . . . . . . 
q Q . . . o . . 
R . . N o N . . 
o o . o . . o B    C+
K B . . . . . R    Proof game in 24.0


Retro problems from Thema Danicum 111, July 2003:

1nbqkbnr/1ppppp1p/8/8/8/8/P1PPPPPP/BNRQKBNR (15+13)

. n b q k b n r    Eyjólfur Ó. Eyjólfsson
. + + + + + . +    9160 TD 111
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
. . . . . . . . 
o . o o o o o o    C+
B N R Q K B N R    Proof game in 6.5

rnbNkR2/pp1ppp2/7n/8/2R3P1/6rB/P2PPP2/qNBQK1b1 (13+13)

r n b N k R . .    Henrik Juel
+ + . + + + . .    9161 TD 111
. . . . . . . n 
. . . . . . . . 
. . R . . . o . 
. . . . . . r B 
o . . o o o . .    C+
q N B Q K . b .    Proof game in 13.5

4n3/1p1n4/6qk/p1b5/p5p1/2p1rN1b/PPP1P2p/RNBQKBrR (12+14)

. . . . n . . .    Unto Heinonen
. + . n . . . .    9162 TD 111
. . . . . . q k 
+ . b . . . . . 
+ . . . . . + . 
. . + . r N . b 
o o o . o . . + 
R N B Q K B r R    Proof game in 28.0