Mar-Apr 2004
R224c - Wolfgang Dittmann
Probleemblad, Mar-Apr 2004
This problem has later be found to be unsolveable
12+11. Retract 4 moves; then #1 (Proca Retractor, Anti-Circe)
[7Q/Pp1PppPp/rpP5/k3p3/rRP5/np6/KP4PP/B7]
Solution
R234 - Wolfgang Dittmann
This problem has later be found to have duals
5+5. Retract 4 moves; then #1 (Proca Retractor, Anti-Circe)
[8/8/3N1k2/1R1P4/2p2p2/5p2/2P5/4Kn2]
R235 - Henrik Juel
2+2. Retract 2 moves; then #1 (Høeg Retractor)
[7b/8/8/kP6/8/3K4/8/8]
R236 - Tom Volet
14+12. Release the position!
[2rn2bN/Kpp2p2/4p1p1/4p1p1/2P3P1/2Pk1P1B/1PRN1PP1/2BQn3]
R237 - Mario Parrinello
13+12. Proof Game in 12.0 moves
[rnk3q1/p1ppBpp1/8/r3p3/8/8/P1pPPP1P/RN1QKBNR]
R238 - Unto Heinonen
11+12. Proof Game in 16.0 moves
[r1bq1bnk/p1p1p2p/5p2/8/3n3R/1P4N1/2PP1PP1/1KB2Q1R]
R239 - Paul Raican
14+14. Proof Game in 18.0 moves
[r2qkbnr/p1ppp1pp/b1p5/4n3/P6K/2PRP1PB/1P1PP2P/1NRQ4]
R240 - Jorge Lois, Roberto Osorio
12+15. Proof Game in 18.0 moves
[1nbqkbnr/p1pppRpp/2pP4/7Q/5p2/2B4P/1P1KNP1P/R2B4]
R241 - Göran Wicklund
14+15. Proof Game in 21.5 moves
[R7/1ppnkbb1/Bpr1p1p1/3p1pR1/3PPBn1/2N2rP1/qPPKNPP1/8]