r1b1kbn1/pp1p4/1q2pppr/2p4p/Pn1P3P/R1P4R/1P2PPP1/1NBQKBN1 w q - 4 10
FEN state: r1b1kbn1/pp1p4/1q2pppr/2p4p/Pn1P3P/R1P4R/1P2PPP1/1NBQKBN1 w q - 4 10 ; Best move: c3b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at b7 and black pawn at d7. Black queen at b6, black pawn at e6, black pawn at f6, black pawn at g6 and black rook at h6. Black pawn at c5 and black pawn at h5. White pawn at a4, black knight at b4, white pawn at d4 and white pawn at h4. White rook at a3, white pawn at c3 and white rook at h3. White pawn at b2, white pawn at e2, white pawn at f2 and white pawn at g2. White knight at b1, white bishop at c1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. Black queenside is the only castle move available. Half move number is 4. Full move number is 10. White to move.