[Retros] Pawn to-the-3rd-rank mates, etc.

[Richard Stanley]

An improvement on Pa6xb5 discovered checkmate (C+):

  1.e2-e3 e7-e6    2.Ke1-e2 Qd8-f6   3.Ke2-d3 Qf6*b2   4.Kd3-c4 Qb2*c2+   
  5.Kc4-b5 a7-a6+  6.Kb5-a5 Qc2-c5+  7.Bf1-b5 a6*b5 dia 

Richard