r1b1k3/1ppq1pbr/n5pp/p2pp3/1P1P2n1/P1P1QP1N/1B2P1PP/RN2KB1R w q - 0 13
FEN state: r1b1k3/1ppq1pbr/n5pp/p2pp3/1P1P2n1/P1P1QP1N/1B2P1PP/RN2KB1R w q - 0 13 ; Best move: f3g4
The current state of the chess board is: Black rook at a8, black bishop at c8 and black king at e8. Black pawn at b7, black pawn at c7, black queen at d7, black pawn at f7, black bishop at g7 and black rook at h7. Black knight at a6, black pawn at g6 and black pawn at h6. Black pawn at a5, black pawn at d5 and black pawn at e5. White pawn at b4, white pawn at d4 and black knight at g4. White pawn at a3, white pawn at c3, white queen at e3, white pawn at f3 and white knight at h3. White bishop at b2, white pawn at e2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 0. Full move number is 13. White to move.