r3k1nr/1R6/n3b3/P1pp1p1P/4P1Np/3PKN1B/P1P5/2BQ3R w q - 2 23
FEN state: r3k1nr/1R6/n3b3/P1pp1p1P/4P1Np/3PKN1B/P1P5/2BQ3R w q - 2 23 ; Best move: e4f5
The current state of the chess board is: Black rook at a8, black king at e8, black knight at g8 and black rook at h8. White rook at b7. Black knight at a6 and black bishop at e6. White pawn at a5, black pawn at c5, black pawn at d5, black pawn at f5 and white pawn at h5. White pawn at e4, white knight at g4 and black pawn at h4. White pawn at d3, white king at e3, white knight at f3 and white bishop at h3. White pawn at a2 and white pawn at c2. White bishop at c1, white queen at d1 and white rook at h1. Black queenside is the only castle move available. Half move number is 2. Full move number is 23. White to move.