Right Fourth File Rook

Right Fourth File Rook formation
☖ pieces in hand:
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☗ pieces in hand:

In shogi, Right Fourth File Rook (右四間飛車 migi shikenbisha) is a Static Rook opening in which the rook is positioned on the fourth file if played by Black or the sixth file if played by White.

Typically, Right Fourth File Rook develops the right silver into a Reclining Silver attacking structure.