The Retrograde Analysis Corner

StrateGems

No. 23, July-September 2003

R0106 - Alexander Kislyak

StrateGems 23, Jul-Sep 2003

[7k/3pppRR/Pp4P1/6pQ/6pb/4PPrq/1PP1PrP1/3n2K1]

12+12. Mate?

[7k/3pppRR/Pp4P1/6pQ/6pb/4PPrq/1PP1PrP1/3n2K1]

R0107 - Wolfgang Dittmann

StrateGems 23, Jul-Sep 2003

[7Q/8/8/5b2/8/3k4/7P/b3K2r]

3+4. Retract 15 half-moves for #1 (Proca retractor, AntiCirce Cheylan)

[7Q/8/8/5b2/8/3k4/7P/b3K2r]

P0126 - Ryan McCracken

StrateGems 23, Jul-Sep 2003

For Diane

[rnbqkbn1/pppppp2/7P/6Pp/P7/3PKR1N/1PP1PP1R/8]

12+14. Shortest proof game in 12.5 moves

[rnbqkbn1/pppppp2/7P/6Pp/P7/3PKR1N/1PP1PP1R/8]

P0127 - Mario Parrinello

StrateGems 23, Jul-Sep 2003

[1R4q1/p2pp1pp/bp2kp2/8/P3n3/2r5/2rPPPPP/1NBQKBNR]

14+13. Shortest proof game in 13.5 moves

[1R4q1/p2pp1pp/bp2kp2/8/P3n3/2r5/2rPPPPP/1NBQKBNR]

P0128 - Rustam Ubaidullaev

StrateGems 23, Jul-Sep 2003

[r1bq2k1/ppbp1ppp/1Rpp1n2/1P6/P6P/2PP1N2/2BP1PP1/1NBQK2n]

15+15. Shortest proof game in 18.5 moves

[r1bq2k1/ppbp1ppp/1Rpp1n2/1P6/P6P/2PP1N2/2BP1PP1/1NBQK2n]

P0129 - Dan Meinking

StrateGems 23, Jul-Sep 2003

Dedicated to the Riverside Chess Club

[QBRbk1nr/3p1ppp/qpp5/p1PBp3/P1N5/1P4P1/3PPP1P/nNrbK2R]

16+16. Shortest proof game in 21.5 moves

[QBRbk1nr/3p1ppp/qpp5/p1PBp3/P1N5/1P4P1/3PPP1P/nNrbK2R]

P0130 - Michel Caillaud

StrateGems 23, Jul-Sep 2003

Dedicated to Gianni Donati

[4kB1R/pbppp2n/1p4pr/2b2p1r/3P3q/1K3P2/PPP2P1P/RNNQ1B1R]

16+14. Shortest proof game in 22.5 moves

[4kB1R/pbppp2n/1p4pr/2b2p1r/3P3q/1K3P2/PPP2P1P/RNNQ1B1R]

P0131 - Bernd Gräfrath

StrateGems 23, Jul-Sep 2003

Dedicated to Ralph J. Binnewirtz

[rnbkq1nr/ppp4p/8/3pp1p1/8/5P2/PPPPPP1P/NRBQKBNR]

16+14. Shortest proof game in 11.0 moves (Losing chess)

[rnbkq1nr/ppp4p/8/3pp1p1/8/5P2/PPPPPP1P/NRBQKBNR]