The Retrograde Analysis Corner

StrateGems

No. 26, Apr-Jun 2004

R0110 - Tom Volet

StrateGems 26, Apr-Jun 2004

[1nb2BKN/1p1pPPpp/p3pRqQ/5pRN/2P3Pk/7B/1P3PP1/8]

15+11. What squares did bKR occupy?

[1nb2BKN/1p1pPPpp/p3pRqQ/5pRN/2P3Pk/7B/1P3PP1/8]

R0111 - Paul Raican

StrateGems 26, Apr-Jun 2004

This problem was later found to be cooked by Dmitri Baibikov

[1B6/8/8/8/8/8/P7/1B6]

3+0. Add kings for an Illegal Cluster (Rex Multiplex)

[1B6/8/8/8/8/8/P7/1B6]

R0112 - Klaus Wenda

StrateGems 26, Apr-Jun 2004

[4E3/8/8/4N3/5B2/6P1/8/3BkK2]

5+1. Retract 2 moves; then mate in one (Proca Retractor, Anti-Circe Cheylan, Equihopper e8)

[4E3/8/8/4N3/5B2/6P1/8/3BkK2]

R0113 - Wolfgang Dittmann

StrateGems 26, Apr-Jun 2004

[6N1/1p3P1b/1p6/B1k3b1/p1p5/1p2nP2/4p2P/4K3]

6+10. Retract 5 moves; then mate in one (Proca Retractor, Anti-Circe Cheylan, no forward defense)

[6N1/1p3P1b/1p6/B1k3b1/p1p5/1p2nP2/4p2P/4K3]

P0149 - Marco Bonavoglia

StrateGems 26, Apr-Jun 2004

[rnbqk1n1/pppp1pp1/4p3/7p/8/2P2Pb1/PPPNP1P1/R1BQKBNR]

15+15. Proof Game in 8.0 moves

[rnbqk1n1/pppp1pp1/4p3/7p/8/2P2Pb1/PPPNP1P1/R1BQKBNR]

P0150 - Mario Parrinello

StrateGems 26, Apr-Jun 2004

[3rBrk1/ppp4p/n4p2/1Q1p4/1b6/5P2/PPPPNPP1/RNBK3R]

15+11. Proof Game in 12.0 moves

[3rBrk1/ppp4p/n4p2/1Q1p4/1b6/5P2/PPPPNPP1/RNBK3R]

P0151 - Unto Heinonen

StrateGems 26, Apr-Jun 2004

[r2q1bnk/p1pnp2p/B4p2/5b2/2PP1P1R/5N2/1P4P1/K1BQR3]

12+12. Proof Game in 16.5 moves

[r2q1bnk/p1pnp2p/B4p2/5b2/2PP1P1R/5N2/1P4P1/K1BQR3]

P0152 - Ryan McCracken

StrateGems 26, Apr-Jun 2004

After Cornel Pacura

[3r2n1/p1pk1p2/1n1p3p/1p1rp1p1/qP1P2P1/P3PR2/2P2P1P/1NBQKBNR]

16+14. Proof Game in 16.5 moves

[3r2n1/p1pk1p2/1n1p3p/1p1rp1p1/qP1P2P1/P3PR2/2P2P1P/1NBQKBNR]

P0153 - Joost de Heer

StrateGems 26, Apr-Jun 2004

Dedicated to Gianni Donat

[rn2kbnr/2pp1ppp/3q4/7B/8/N7/2PPP1PR/RrBK1BbQ]

12+14. Proof Game in 17.0 moves

[rn2kbnr/2pp1ppp/3q4/7B/8/N7/2PPP1PR/RrBK1BbQ]

P0154 - Unto Heinonen

StrateGems 26, Apr-Jun 2004

[nrbqkbn1/2ppppp1/1p6/2RB4/1P1rN3/4BPP1/2PPP2P/3KQ1N1]

14+14. Proof Game in 18.5 moves

[nrbqkbn1/2ppppp1/1p6/2RB4/1P1rN3/4BPP1/2PPP2P/3KQ1N1]

P0155 - Marco Bonavoglia

StrateGems 26, Apr-Jun 2004

[4k2r/pp1Npp1p/2pp1p1n/q3n3/5N2/PPP3P1/1B1PPPP1/RKQ2B2]

15+13. Proof Game in 20.5 Moves

[4k2r/pp1Npp1p/2pp1p1n/q3n3/5N2/PPP3P1/1B1PPPP1/RKQ2B2]