1nb1qbr1/2p1ppp1/rk1p4/pp3P1p/2PP2n1/NQ2B3/PP1KP2P/3R1BNR w - - 4 13
FEN state: 1nb1qbr1/2p1ppp1/rk1p4/pp3P1p/2PP2n1/NQ2B3/PP1KP2P/3R1BNR w - - 4 13 ; Best move: c4b5
The current state of the chess board is: Black knight at b8, black bishop at c8, black queen at e8, black bishop at f8 and black rook at g8. Black pawn at c7, black pawn at e7, black pawn at f7 and black pawn at g7. Black rook at a6, black king at b6 and black pawn at d6. Black pawn at a5, black pawn at b5, white pawn at f5 and black pawn at h5. White pawn at c4, white pawn at d4 and black knight at g4. White knight at a3, white queen at b3 and white bishop at e3. White pawn at a2, white pawn at b2, white king at d2, white pawn at e2 and white pawn at h2. White rook at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 13. White to move.