Wrong Diagonal Bishop

The Wrong Diagonal Bishop frequently appears in the recorded handicap games from the Edo period.

Furthermore, adopting such an early attack can put pressure on their opponent and disturb their normal development in other openings.

One of the aims of Primitive Wrong Diagonal Bishop as played by Black is to make it difficult for White to play a standard Ranging Rook strategy as in order to do White's rook must be moved twice (first to the sixth file, then to the fourth file) losing tempo.

After Black's bishop drop, White has several options to defend their central pawn.

[1] The Double Wrong Diagonal Bishop B*65 variation appears in the Saburō Takeichi vs Manabu Senzaki Meijin ranking tournament on 1990 June 18.

[2] After rejecting a bishop trade, Senzaki also captured Takeichi's pawn on the seventh file.

Also, the Wrong Diagonal bishop drop can only be made by Black since Black's pawn on 76 is already defended by the silver on the 77 square, which, needless to say, eliminates the possibility of Double Wrong Diagonal Bishop variations.