r1b2bnr/1pqp3p/p1p2k2/1Q2ppN1/P7/1P2PP2/n1PP2PP/RNBK1B1R w - - 4 13
FEN state: r1b2bnr/1pqp3p/p1p2k2/1Q2ppN1/P7/1P2PP2/n1PP2PP/RNBK1B1R w - - 4 13 ; Best move: b5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at b7, black queen at c7, black pawn at d7 and black pawn at h7. Black pawn at a6, black pawn at c6 and black king at f6. White queen at b5, black pawn at e5, black pawn at f5 and white knight at g5. White pawn at a4. White pawn at b3, white pawn at e3 and white pawn at f3. Black knight at a2, white pawn at c2, white pawn at d2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 13. White to move.