Solution:
a)
1.Rh5-h6 ! threat:
2.Bf7-e6 #
1...g5-g4
2.Rh6-h5 #
1...Rb7*b6
2.Qa8-e4 #
1...e7-e5
2.Rh6-f6 #
1...e7-e6
2.Rh6-f6 #
b) -bPh2 +wPf6 +bSe4
1.Sc3*e4 ! zugzwang.
1...f4-f3
2.Se4-g3 #
1...Kf5*e4
2.Bf7-g6 #
1...Rb7*b6
2.Rh5*g5 #
1...Rb7-a7
2.Rh5*g5 #
1...Rb7-b8
2.Rh5*g5 #
1...Rb7-d7
2.Rh5*g5 #
1...Rb7-c7
2.Rh5*g5 #
1...e7-e5
2.Se4-d6 #
1...e7-e6
2.Se4-d6 #
1...e7*f6
2.Se4-d6 #
c) -bPh2 +wPf6 +wPd6
1.Bd8-c7 ! zugzwang.
1...f4-f3
2.g2-g4 #
1...Rb7*b6
2.Qa8-e4 #
1...Rb7-a7
2.Qa8-e4 #
1...Rb7-b8
2.Qa8-e4 #
1...Rb7*c7
2.Qa8-e4 #
1...e7-e5
2.Qa8-c8 #
1...e7-e6
2.Bf7-g6 #
1...e7*d6
2.Qa8-c8 #
1...e7*f6
2.Qa8-c8 #
Similar diagrams (3):
References:
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ProblemsPGN.rar (pgn)
[Event "The Observer 1923 (276)"]
[Site "The Observer 1923 (276)"]
[Date "1923.??.??"]
[Round "?"]
[White "B.HARLEY"]
[Black "#2"]
[Result "1-0"]
[SetUp "1"]
[FEN "Q2B4/1r2pBK1/bP6/Rp3kpR/2PP1p2/2N1p2P/4N1Pp/8 w - - 0 1"]
[PlyCount "1"]
[EventDate "1923.??.??"]
1. Bc7 1-0
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Problemiste PBM Collections (pbm2py)
Author B.HARLEY
Origin The Observer 1923 (276)
Remark text: Original diagram 3 solutions
Remark text: +ph2
Remark text: added b) , c)
Remark file://Pravda.pbm/246
Stipulation #2
Forsyth Q2B4/1r2pBK1/bP6/Rp3kpR/2PP1p2/2S1p2P/4S1Pp/8
Twin remove h2 add white Pf6 add black se4
Twin remove h2 add white Pf6 add white Pd6