The Retrograde Analysis Corner

StrateGems

No. 31, Jul-Sep 2005

R0120 - Andrei Frolkin, Andrei Kornilov

StrateGems 31, Jul-Sep 2005

[N6N/2pp1pp1/2P2pRb/1p4PR/6pr/4PP1k/2PPrP1n/3b2KQ]

13+13. a) What previous promotions occurred? b) Minimum single moves since last wK move?

[N6N/2pp1pp1/2P2pRb/1p4PR/6pr/4PP1k/2PPrP1n/3b2KQ]

R0121 - René J. Millour

StrateGems 31, Jul-Sep 2005

[8/1p1p2P1/6P1/p1p5/2P5/8/k3PP1P/3n2K1]

7+6. Where were the rooks captured? Who captured them? (Monochrome)

[8/1p1p2P1/6P1/p1p5/2P5/8/k3PP1P/3n2K1]

R0122 - Wolfgang Dittmann

StrateGems 31, Jul-Sep 2005

[3k4/2p2KBp/BPP1rpp1/1P1pPp2/3p4/6PP/1P1P2RQ/8]

13+9. Retract 5 moves; then mate in one (Proca Retractor, Anti-Circe)

[3k4/2p2KBp/BPP1rpp1/1P1pPp2/3p4/6PP/1P1P2RQ/8]

R0123 - Klaus Wenda

StrateGems 31, Jul-Sep 2005

[3b4/8/6B1/8/k7/2PN1P2/1P3r2/3K3q]

6+4. Retract 6 moves; then mate in one (Proca Retractor, Anti-Circe)

[3b4/8/6B1/8/k7/2PN1P2/1P3r2/3K3q]

R0124 - Wolfgang Dittmann

StrateGems 31, Jul-Sep 2005

[7b/1Pr5/pk6/1P6/1Kp5/8/r3P2p/7b]

4+8. Retract 11 moves; then mate in one (Proca Retractor, Anti-Circe)

[7b/1Pr5/pk6/1P6/1Kp5/8/r3P2p/7b]

P0176 - Radovan Tomasevic, Zoran Sibinovic

StrateGems 31, Jul-Sep 2005

[2b2bnr/1ppp1kpp/5p2/8/8/8/PPPPnPPP/RNBQKBNR]

15+12. Proof Game in 8.0 moves (2 solutions)

[2b2bnr/1ppp1kpp/5p2/8/8/8/PPPPnPPP/RNBQKBNR]

P0177 - Mario Parrinello

StrateGems 31, Jul-Sep 2005

[2b2q2/1pp1ppp1/2pr4/5k1p/8/1r6/2PPPPPP/RNBQKBNR]

14+12. Proof Game in 13.0 moves

[2b2q2/1pp1ppp1/2pr4/5k1p/8/1r6/2PPPPPP/RNBQKBNR]

P0178 - Jorge Lois, Roberto Osorio

StrateGems 31, Jul-Sep 2005

[1n6/1pp2ppq/2p1p2n/7p/1p5k/1PP5/1Prr1PPP/RNBQKBNR]

14+14. Proof Game in 21.0 moves

[1n6/1pp2ppq/2p1p2n/7p/1p5k/1PP5/1Prr1PPP/RNBQKBNR]

P0179 - Unto Heinonen

StrateGems 31, Jul-Sep 2005

A correction of his 1st prize, Springaren 1994

[Rn1QKBn1/2p3p1/5pr1/4p2B/1PbPP2p/2P5/5PPP/rNbqk1NR]

Proof Game in 23.0 moves

[Rn1QKBn1/2p3p1/5pr1/4p2B/1PbPP2p/2P5/5PPP/rNbqk1NR]