No. 205, Feb 2004
12174 - Dmitri Baibikov Die Schwalbe, No. 205, Feb 2004
12+9. Which queens are promoted? (8 Wh. Queens)
[kQQQ4/1p3ppp/QRpp4/BP6/1p2Q3/1Q6/3K4/Qq3Q2]
12175 - Alexander Yarosh Die Schwalbe, No. 205, Feb 2004 (after Rol & Goldsteen)
12+14. Release the position (3 Bl. Rooks)
[8/8/2p5/PPPP4/kr1rPp2/pnK1rP2/BpbQRpp1/NRq1b3]
12176 - Günther Weeth & Werner Keym Die Schwalbe, No. 205, Feb 2004
11+8. Retract 3 half-moves (2 white and 1 black). Can white reach a position in which black can't castle anymore? (Proca retractor) a) Diagram b) Pf2->d6 c) Pf2->g5 d) Pf2->h6
[r4k2/pppp2p1/8/8/8/5P1P/1PPPPpP1/1KB2BR1]
12177 - Gligor Denkovski Die Schwalbe, No. 205, Feb 2004
14+16. Shortest proof game in 11.0 moves
[rnbkqbnr/pppp1ppp/4p3/8/7N/3PPN2/PPP2P1P/2BKQB1R]
12178 - Roberto Osorio Die Schwalbe, No. 205, Feb 2004
14+15. Proof game in exactly 13.0 moves
[rnbqkbnr/ppppppp1/7B/8/6Q1/1B1PP1KP/PPP2N1R/RN6]
12179 - Jorge Lois Die Schwalbe, No. 205, Feb 2004
11+10. Shortest proof game in 16.0 moves
[8/2p1p3/rnbqkbnr/8/4P1P1/5P2/PPP4P/RNB1K3]
12180 - Gerd Wilts & Reto Aschwanden Die Schwalbe, No. 205, Feb 2004
12+14. Shortest proof game in 18.0 moves (3 Bl. Knights, 3 Bl. Rooks)
[r2qkb1r/2ppp2p/n4n2/5p2/8/n3BP1K/1PPPPP1P/R2r2NR]
12181 - Christoph Fieberg Die Schwalbe, No. 205, Feb 2004
14+16. Shortest proof game in 22.5 moves (3 Wh. Rooks)
[3Q1bnn/p1p1prpq/R1p2kbr/5p1p/2B2B1R/Pp6/1P3PPP/1K3NNR]
12182 - Paul Raican Die Schwalbe, No. 205, Feb 2004 This problem was later found to be cooked by Ryan McCracken
12+11. Shortest proof game in 28.5 moves (3 Wh. Bishops)
[rnbqkbnR/pPp1p3/Pr6/P3B1R1/P4P2/K7/1B4B1/1N6]
12183 - Klaus Wenda Die Schwalbe, No. 205, Feb 2004
2+7. Retract 5 half-moves for a mate in one (Proca retractor, AntiCirce)
[1q2b3/8/8/8/8/4n3/p5np/1k2K1N1]
12184 - Henryk Grudzinski Die Schwalbe, No. 205, Feb 2004
16+16. Shortest proof game in 13.0 moves (3 Wh. Bishops, 9 Bl. Bishops) (CousCousCirce)
[rnq3Br/2pBk3/B7/1b4b1/2b1bb2/3Pb3/PPPnbPPP/RNbQKbNR]
CousCousCirce: A captured unit is reborn on the rebirth square of the capturing unit. If a pawn captures and promotes, the piece is reborn on the rebirth square of the promoted piece. If a pawn is reborn on the promotion rank, it's promoted. If the rebirth square is occupied, the piece is removed from the board. Example game: 1. e4 h5 2. Qh5[+bPd1=bB] Rh5[-]
11719v - Frolkin & Kornilov Die Schwalbe, No. 205, Feb 2004
13+10. Where were the black knights captured?
Intention: 1. e3-e4 a6-a5 2. Bd2xSc1 ... 5. Re8-e7 Se7-c6 6. Rf8xSe8! Sg7-e8 7. Re8-f8 Qh8-h7 8. Rf8xe8 h7xQ,Sg6 9. Qg3-g6/Sh4-g6 a7-a6 10. g6xSf7! etc.
[3b2B1/2pRRP1q/3ppKpk/p4p1p/4P3/P7/1PP2PPP/2B5]
11791v - A. Yarosh Die Schwalbe, No. 205, Feb 2004
Pd4->d2, Qf4->d4, Release the position
11792v - A. Yarosh Die Schwalbe, No. 205, Feb 2004
+wPg2
11857v - S. Orce Die Schwalbe, No. 205, Feb 2004
Ng1->h1