py_20080415

{

} 1.e2-e1=S Rc5-f5 2.Se1-d3 Rf5-f3[d3=w] + 3.Kh3-h1 Sd3-f2 #{

} 1.e2-e1=B Rc5-d5 2.Be1-d2 Rd5-d3[d2=w] + 3.Kh3-h8 Bd2-c3 #

{
Essais
} 1.Qa7-h7 ? zugzwang. but 1...Kf6-e5 !{

} 1.Qa7-g7 + ? 1...Kf6-f5 2.Ba2-d5 threat: 3.Qg7-g5 # but 1...Kf6*g7 !{

} 1.Qa7-f7 + ? but 1...Kf6-e5 !{

} 1.Qa7-e7 + ? 1...Kf6-g6 2.Qe7-f8 threat: 3.Ba2-b1 #{
} 2.Ba2-b1 + 2...Kg6-h6 3.Qe7-g5 # 3.Qe7-f6 # 3.Qe7-f8 # 3.Qe7-h7 #{
} 1...Kf6-f5 2.Ba2-b1 + 2...Kf5-f4 3.Qe7-e4 #{
} but 1...Kf6*e7 !{

} 1.Kh4-h5 ? zugzwang. 1...Kf6-f5 2.Qa7-e3 zugzwang. 2...Kf5-f6 3.Qe3-g5 #{
} but 1...Kf6-e5 !{

} 1.Kh4-g4 ? threat: 2.Qa7-f7 + 2...Kf6-e5 3.Qf7-f4 #{
} 1...Kf6-e5 2.Qa7-c5 + 2...Ke5-e4 3.Ba2-b1 #{
} 2...Ke5-f6 3.Qc5-g5 #{
} but 1...Kf6-g6 !{

} 1.Ba2-g8 ? zugzwang. 1...Kf6-g6 2.Qa7-f7 + 2...Kg6-h6 3.Qf7-f6 # 3.Qf7-h7 #{
} 1...Kf6-f5 2.Qa7-e3 zugzwang. 2...Kf5-f6 3.Qe3-g5 #{
} 2...Kf5-g6 3.Qe3-g5 #{
} but 1...Kf6-e5 !{

solution :
} 1.Qa7-c5 ! threat: 2.Qc5-g5 #{
} 1...Kf6-g6 2.Qc5-f8 threat: 3.Ba2-b1 #{
} 1...Kf6-g7 2.Qc5-h5 zugzwang. 2...Kg7-f8 3.Qh5-f7 #{
} 2...Kg7-f6 3.Qh5-g5 #

{

} 1...Sa8-c7 {
} 2.Bf4-g3 + Ke1-d2 {
} 3.Ra3-a2 + Kd2-d3 {
} 4.Ka4-a3 Kd3-c3 {
} 5.a5-a4 Sc7-b5 #{

} 1...Ke1-f1 {
} 2.Ra3-f3 + Kf1-e2 {
} 3.Bf4-e3 Ke2-d3 {
} 4.Be3-f4 + Kd3-c4 {
} 5.Rf3-a3 Sa8-b6 #