[Retros] Three SPG's from Paul Monsky

[Joost de Heer]

Some more cross capture problems:

R063c - Unto Heinonen
Probleemblad Sep./Oct. 2000
[2k5/2p2p2/3p2pp/PP6/8/2PPp1PP/1K2PP2/1N1qQ1N1]
12+8. Proof game in 18.5 moves

1. a4 b5 2. axb5 Na6 3. Rxa6 d5 4. Rg6 hxg6 5. b4 Rh3 6. Ba3 Rg3 7. hxg3 
Nh6 8. Rxh6 Bh3 9. gxh3 gxh6 10. Bg2 Bg7 11. Be4 Bc3 12. dxc3 a5 13. Kd2 
dxe4+ 14. Kc1 e3 15. Qe1 Qd1+ 16. Kb2 O-O-O 17. bxa5 Rd3 18. Bd6 exd6 
19. cxd3

Five pairs of cross captures.

PR02 - Michel Caillaud
Problem Paradise, Spring 1998
[b2r2n1/p2ppp2/1q4pp/1pb5/1kr5/8/PP2PPPP/RNBQKBNR]
14+14. Proof game in 16.5 moves

1. d4 b5 2. Qd3 Bb7 3. Qg6 hxg6 4. d5 Rh4 5. Bh6 gxh6 6. d6 Bg7 7. dxc7 
Bd4 8. cxb8=B Qb6 9. Bf4 O-O-O 10. c4 Ba8 11. c5 Kb7 12. c6+ Ka6 13. c7 
Ka5 14. c8=Q Kb4 15. Qc2 Bc5 16. Bc1 Rc4 17. Qd1

Two Pronkin pieces replace the cross-captured pieces.

P0097 - Kostas Prentos
StrateGems 18, 2002
[1n2k1n1/4pp1R/ppp3pp/3p4/2PP4/PPN1P1PP/3KNr2/8]
11+12. Proof game in 17.0 moves

1. d4 c6 2. Qd3 Qb6 3. Qg6 Qb3 4. axb3 hxg6 5. Ra6 Rh3 6. Rb6 Rg3 7. 
hxg3 axb6 8. Rh7 Ra2 9. Bh6 gxh6 10. e3 Bg7 11. Ba6 Be5 12. c4 Bd6 13. 
Nc3 Ba3 14. bxa3 Rxf2 15. Nge2 d5 16. Kd2 Bh3 17. gxh3 bxa6

White and black crosscaptures on a-, b-, g- and h-file.

R172 - Unto Heinonen
Probleemblad, June 2002
[1n2k3/2QR4/5rR1/PPPPPPPP/1bq3np/4B3/3r4/1N2KBN1]
16+8. Proof game in 23.5 moves

1. a4 b5 2. axb5 e5 3. Ra6 Ba3 4. d4 c5 5. dxc5 Qh4 6. Qd6 g5 7. Qc7 d5 
8. Rd6 a5 9. c4 Ra6 10. cxd5 Qc4 11. f4 Bg4 12. Rd7 Rf6 13. fxe5 Rf2 14. 
h4 f5 15. hxg5 Nf6 16. Rh6 Rf8 17. Rg6 h5 18. e4 h4 19. Be3 Bh5 20. g4 
Rd2 21. gxh5 Ng4 22. b4 Rf6 23. bxa5 Bb4 24. exf5

Four cross-captures on the 5th rank