No. 217, February 2006
12900v - Günther Ernst Weeth Die Schwalbe, No. 217, February 2006
7+4. Retract 2 moves, then s#1 (Proca retractor, Anti-Circe)
[r4k2/3p4/3P4/8/8/1P3N2/1BP5/1b2K2R]
12955 - Alexander Jarosch Die Schwalbe, No. 217, February 2006
12+13. Add the White King and a Pawn; then retract one White move; then #2
[r3k1NQ/1ppn2p1/n1p1pp2/2N5/1r6/3P2PP/pP1PPPq1/2B4B]
12956 - Werner Keym Die Schwalbe, No. 217, February 2006
14+11. Retract 3 moves; then #1 (2 solutions) (Proca retractor)
[rB5K/rp3p2/p7/8/3PP1p1/2PBpPnP/1R1P1pPk/NQ2bR2]
12957 - Emiliano F. Ruth Die Schwalbe, No. 217, February 2006
14+10. Retract 9 moves; then #1 (Proca retractor)
[3n4/5r2/k1p1P3/4P1p1/1p3pN1/1P5N/P1PPNRNK/2bbR1nQ]
12958 - Roberto Osorio & Jorge L. Lois Die Schwalbe, No. 217, February 2006
11+13. Retract 17 moves; then #1 (Proca retractor)
[1Nrqkb1r/1ppppppp/P7/8/8/6PB/PP2PP1P/4K1nN]
12959 - Eyjolfur O. Eyjolfsson Die Schwalbe, No. 217, February 2006
16+15. Proof game in 13.5 moves (C+)
[1NBrbbnr/ppp1pppp/3pQ3/1k2PP2/3n4/3P4/PPP2P1P/RNB1K2R]
12960 - Thierry Le Gleuher Die Schwalbe, No. 217, February 2006 Dedicated to Gerd Wilts
2+1. Proof game in 16.5 moves with 4. g2-g4
[4k3/8/8/8/8/8/8/R3K3]
12961 - Bernd Gräfrath Die Schwalbe, No. 217, February 2006
8+1. First move? Last move? (monochromatic chess)
[8/8/8/1k6/PP6/6P1/3PPPP1/4K3]
12962 - Günther Ernst Weeth & Klaus Wenda Die Schwalbe, No. 217, February 2006
5+11. Retract 5 moves; then #1 (Proca retractor, Anti-Circe)
[6rk/6B1/2p5/2P2p2/5p2/r2b1p2/2P3Kn/1n3R1b]
12963 - Klaus Wenda Die Schwalbe, No. 217, February 2006
9+7. Retract 3 moves; then s#1 (Proca retractor, Anti-Circe)
[1Q2R3/qr4N1/7b/8/R1n5/Kk6/PPn2B2/3rN3]
12964 - Martin Walter Die Schwalbe, No. 217, February 2006
16+14. Proof game in 6 moves (Anti-Circe)
[rnbq2nr/ppp2ppp/3kp3/8/3K4/8/PPPPPPPP/RNBQ1BNR]
5648vv - Wolfgang Dittmann & Klaus Wenda Die Schwalbe, No. 217, February 2006
12+9. Retract 3 moves, then #1 (Proca Retractor, Madrasi)
[2kr1Rrb/Bp3pPp/1P1K4/PPPpPP2/7R/3p4/4P3/8]