r1bqkbn1/r7/pp1p4/P1p1p1p1/2P3nP/BPN5/2RP1p1N/3KQB1R w q - 4 25
FEN state: r1bqkbn1/r7/pp1p4/P1p1p1p1/2P3nP/BPN5/2RP1p1N/3KQB1R w q - 4 25 ; Best move: e1e4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black knight at g8. Black rook at a7. Black pawn at a6, black pawn at b6 and black pawn at d6. White pawn at a5, black pawn at c5, black pawn at e5 and black pawn at g5. White pawn at c4, black knight at g4 and white pawn at h4. White bishop at a3, white pawn at b3 and white knight at c3. White rook at c2, white pawn at d2, black pawn at f2 and white knight at h2. White king at d1, white queen at e1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 25. White to move.