rn1qkbnr/p4p2/bPpp4/4p1p1/1P6/Q2P3P/PB2PP2/RN1K1BNR b kq - 4 13
FEN state: rn1qkbnr/p4p2/bPpp4/4p1p1/1P6/Q2P3P/PB2PP2/RN1K1BNR b kq - 4 13 ; Best move: a7b6
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7 and black pawn at f7. Black bishop at a6, white pawn at b6, black pawn at c6 and black pawn at d6. Black pawn at e5 and black pawn at g5. White pawn at b4. White queen at a3, white pawn at d3 and white pawn at h3. White pawn at a2, white bishop at b2, white pawn at e2 and white pawn at f2. White rook at a1, white knight at b1, white king at d1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 4. Full move number is 13. Black to move.