[Retros] shortest proofgames of castling switchback

[Hirokaz ONODA]

Hi retrofriends,

How about shortest proofgames of castling switchback?

(1) K-side
(8.5, 2): 1.g3 f5 2.Bh3 f4 3.Bxd7 Nxd7 4.Nh3 Ne5 5.O-O Nf3 6.Kg2 e5 7.Rh1
Ng1 8.Kf1 f3 9. Ke1 (Akayo Okaya, Problem Paradise 13, 1999)
(2) K-side with minimum capture
(3) K-side with maximum capture  
(4) Q-side
(5) Q-side with minimum capture
(6) Q-side with maximum capture  
(7) other types

Amici Sumus,
Hiro


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