The Retrograde Analysis Corner

StrateGems

No. 30, Apr-Jun 2005

R0118 - Michael Grushko

StrateGems 30, Apr-Jun 2005

[1GNbk3/4p3/8/8/8/8/8/1K6]

3+3. Retract 1 move; then h#1.5 (Circe Parrain, Grasshopper b8)

[1GNbk3/4p3/8/8/8/8/8/1K6]

[1QNbk3/4p3/8/8/8/8/8/1K6]

R0119 - Radovan Tomasevic

StrateGems 30, Apr-Jun 2005

[3r1k1n/4R3/8/8/8/8/K7/5B2]

3+3. Retract 9 moves; then mate in one (Proca Retractor, Anti-Circe)

[3r1k1n/4R3/8/8/8/8/K7/5B2]

P0170 - Michael Grushko

StrateGems 30, Apr-Jun 2005

[rn2kbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBBK1NR]

15+14. Proof Game in 5.0 moves (Andernach)

[rn2kbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBBK1NR]

P0171 - Michael Grushko

StrateGems 30, Apr-Jun 2005

This problem was later found to be cooked

[r1bqkbBr/pppppp1n/6pp/6N1/1n6/4P2Q/PPPP1PPP/R1B1K1NR]

16+16. Proof Game in 8.0 (Circe Parrain)

[r1bqkbBr/pppppp1n/6pp/6N1/1n6/4P2Q/PPPP1PPP/R1B1K1NR]

P0172 - Unto Heinonen

StrateGems 30, Apr-Jun 2005

[rnb1Kbnr/ppppp1p1/7B/5p2/3P4/5P2/PPP1P1PP/RN2kBNR]

15+14. Proof Game in 10.5 moves

[rnb1Kbnr/ppppp1p1/7B/5p2/3P4/5P2/PPP1P1PP/RN2kBNR]

P0173 - Richard Stanley

StrateGems 30, Apr-Jun 2005

[1nb3nr/1ppp3p/5p2/6k1/r3p3/pP6/P1PPPPPP/RNBKQBNR]

16+13. Proof Game in 13.5 moves

[1nb3nr/1ppp3p/5p2/6k1/r3p3/pP6/P1PPPPPP/RNBKQBNR]

P0174 - Paul Raican

StrateGems 30, Apr-Jun 2005

Dedicated to Kostas Prentos

[2k2bnr/pp2pppp/2P5/P1p5/2P1BRPP/3q4/1P2PPr1/nNBQKbNR]

16+15. Proof Game in 18.5 moves

[2k2bnr/pp2pppp/2P5/P1p5/2P1BRPP/3q4/1P2PPr1/nNBQKbNR]

P0175 - Unto Heinonen

StrateGems 30, Apr-Jun 2005

[rn4nr/p1p2p1p/3pp1p1/5b2/k1P4P/5PP1/1PP3P1/RRNBQKBN]

15+13. Proof Game in 20.5 moves

[rn4nr/p1p2p1p/3pp1p1/5b2/k1P4P/5PP1/1PP3P1/RRNBQKBN]