r4bnr/ppknp2p/2p2pp1/1q1p4/2P3bP/P3PP2/RPQPB2R/1NB2KN1 w - - 3 13
FEN state: r4bnr/ppknp2p/2p2pp1/1q1p4/2P3bP/P3PP2/RPQPB2R/1NB2KN1 w - - 3 13 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black king at c7, black knight at d7, black pawn at e7 and black pawn at h7. Black pawn at c6, black pawn at f6 and black pawn at g6. Black queen at b5 and black pawn at d5. White pawn at c4, black bishop at g4 and white pawn at h4. White pawn at a3, white pawn at e3 and white pawn at f3. White rook at a2, white pawn at b2, white queen at c2, white pawn at d2, white bishop at e2 and white rook at h2. White knight at b1, white bishop at c1, white king at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 3. Full move number is 13. White to move.