A checkmate featuring neutral pawn in Koeko not found in 4.69 version It is not found in 4.65 version either, going back - version 4.63 finds it. See the input, 4.63 output and 4.69 output.
BeginProblem
Stipulation h#1.5
Condition KoeKo
Pieces
White Rd8 Kc5
Black Kd7
Neutral Pb6
Option Variation MoveNumbers NoBoard
EndProblem
Popeye Windows-32Bit v4.63 (4096 KB)
1 (Rd8-c8 Time = 0.031 s)
2 (Rd8-e8 Time = 0.031 s)
3 (Kc5-c6 + Time = 0.031 s)
4 (Kc5-b5 Time = 0.031 s)
5 (Kc5-d6 + Time = 0.031 s)
1...Kc5-d6 + 2.Kd7-c8 nPb6-b7 #
solution finished. Time = 0.031 s
Popeye Windows-32Bit v4.69 (4096 KB)
1 (Kc5-d6 + Time = 0.031 s)
2 (Kc5-b5 Time = 0.031 s)
3 (Kc5-c6 + Time = 0.031 s)
4 (Rd8-c8 Time = 0.031 s)
5 (Rd8-e8 Time = 0.031 s)
solution finished. Time = 0.031 s
Anonymous
Fixed for 4.71