by Mark Kirtley (in: Probleemblad 2-2000)
Following the first article (PB 1999-3), here is another collection of proof games with solutions in no more than 7.0 moves. They are all shortest proof games this time. No. 1 has a deceptively tranquil look in that no surviving piece is away from home, and in the next three examples no pawn is away either. This suggests a history of switchbacks, and one of the four compositions has a remarkable abundance of them, while another hasn't any at all. Peter's No. 5 is perhaps the only proof game ever composed with three equal-length solutions without twinning. There were two shorty composing challenges given in the first article. One of them asked for an AUW, although I had real doubts that it was possible. But in No. 7 Gianni presents it to us. The other challenge was for two tempo maneuvers on the same side in one line of play. No. 8 is an answer from the combined efforts of Joost, Gianni and Michel, which incredibly has a third tempo on the other side. All the examples following No. 8 also have tempo play. Gerd's No. 9 has now-you-see-them-now-you-don't cross-captures. The quiet attractiveness of the five-move tempo trek in Pascal's No. 10 is combined with a second surprise. No. 11 has a theme and an anti-theme. Michel's No. 12 gives the seeker of beauty a lot to smile about. One of its themes has a name, but I think the other one is new. Many thanks to those composers who contributed their suggestions and originals!
1 - Martin W. Hoffmann Schweizer Schachzeitung 1989
15+16. Proof game in 4.0 moves (b): -bQd8
2 - Gianni Donati Original
12+13. Proof game in 7.0 moves
3 - Gianni Donati Original
15+13. Proof game in 5.5 moves
4 - Peter Wong Phénix 1994
14+14. Proof game in 6.0 moves (2 solutions)
5 - Peter Wong Problem Observer 1995 First prize
16+13. Proof game in 6.5 moves (3 solutions)
6 - Mark Kirtley Original
14+16. Proof game in 7.0 moves (2 solutions)
7 - Gianni Donati Original
15+14. Proof game in 7.0 moves (4 variations)
8 - Joost de Heer, Gianni Donati & Michel Caillaud Original
14+15. Proof game in 7.0 moves
9 - Gerd Wilts Retros Mailinglist 1997
14+16. Proof game in 7.0 moves
10 - Pascal Wassong Retros Mailinglist 1999
11 - Mark Kirtley & Michel Caillaud Original
12+16. Proof game in 7.0 moves (2 solutions)
12 - Michel Caillaud Original
15+12. Proof game in 7.0 moves (2 solutions)