11 -
Probleemblad, 2000
12+16. Beweispartie in 7.0 Zügen (2 Lösungen)
[1nbqkbnr/1ppppppp/8/8/1p4Qr/8/2PP1KPP/RNB2BNR]
1. Bb2-b4 Ba7-a6 2. Bb4-b5 Ba4:Bb5 3. Ba2-a4 Ta8:Ba4 4. Bf2-f4 Ta4:Bf4 5. Be2-e4 Tf4:Be4 6. Ke1-f2 Te4-h4 7. DD1-g4 Bb5-b4
1. Bb2-b3 Ba7-a5 2. Bb3-b4 Ba5:Bb4 3. Ba2-a3 Ta8:Ba3 4. Bf2-f3 Ta3:Bf3 5. Be2-e3 Tf3:Be3 6. Ke1-f2 Te3-h3 7. Dd1-g4 Th3-h4