rnb1kb1B/5p2/ppp1p1p1/1P3n1p/NQ1p3P/3PP1P1/PqP3B1/2RK2NR w q - 0 23
FEN state: rnb1kb1B/5p2/ppp1p1p1/1P3n1p/NQ1p3P/3PP1P1/PqP3B1/2RK2NR w q - 0 23 ; Best move: b4b2
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and white bishop at h8. Black pawn at f7. Black pawn at a6, black pawn at b6, black pawn at c6, black pawn at e6 and black pawn at g6. White pawn at b5, black knight at f5 and black pawn at h5. White knight at a4, white queen at b4, black pawn at d4 and white pawn at h4. White pawn at d3, white pawn at e3 and white pawn at g3. White pawn at a2, black queen at b2, white pawn at c2 and white bishop at g2. White rook at c1, white king at d1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 23. White to move.