rn2k1n1/ppq2p1p/2pbb3/3pp3/P5rp/NPP2PPN/3PP1B1/1RB1QK1R w q - 3 13
FEN state: rn2k1n1/ppq2p1p/2pbb3/3pp3/P5rp/NPP2PPN/3PP1B1/1RB1QK1R w q - 3 13 ; Best move: f3g4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black knight at g8. Black pawn at a7, black pawn at b7, black queen at c7, black pawn at f7 and black pawn at h7. Black pawn at c6, black bishop at d6 and black bishop at e6. Black pawn at d5 and black pawn at e5. White pawn at a4, black rook at g4 and black pawn at h4. White knight at a3, white pawn at b3, white pawn at c3, white pawn at f3, white pawn at g3 and white knight at h3. White pawn at d2, white pawn at e2 and white bishop at g2. White rook at b1, white bishop at c1, white queen at e1, white king at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 3. Full move number is 13. White to move.