r1b1k1n1/1ppp2pr/n3p2p/p1P5/P1Bq1P2/2P2KP1/1PQ2P1P/RNB3NR w q - 5 13
FEN state: r1b1k1n1/1ppp2pr/n3p2p/p1P5/P1Bq1P2/2P2KP1/1PQ2P1P/RNB3NR w q - 5 13 ; Best move: c3d4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black knight at g8. Black pawn at b7, black pawn at c7, black pawn at d7, black pawn at g7 and black rook at h7. Black knight at a6, black pawn at e6 and black pawn at h6. Black pawn at a5 and white pawn at c5. White pawn at a4, white bishop at c4, black queen at d4 and white pawn at f4. White pawn at c3, white king at f3 and white pawn at g3. White pawn at b2, white queen at c2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white knight at g1 and white rook at h1. Black queenside is the only castle move available. Half move number is 5. Full move number is 13. White to move.