1r1q1bnr/nb1ppkpp/2p2p2/pp6/1P5P/3P1P2/P1PQP1PR/RNB1KBN1 w - - 4 10
FEN state: 1r1q1bnr/nb1ppkpp/2p2p2/pp6/1P5P/3P1P2/P1PQP1PR/RNB1KBN1 w - - 4 10 ; Best move: b4a5
The current state of the chess board is: Black rook at b8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black knight at a7, black bishop at b7, black pawn at d7, black pawn at e7, black king at f7, black pawn at g7 and black pawn at h7. Black pawn at c6 and black pawn at f6. Black pawn at a5 and black pawn at b5. White pawn at b4 and white pawn at h4. White pawn at d3 and white pawn at f3. White pawn at a2, white pawn at c2, white queen at d2, white pawn at e2, white pawn at g2 and white rook at h2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 10. White to move.