r1q2bn1/2p1pp1r/n1kp2pp/pp6/PP2PP2/3P2P1/2PK2NP/RNBQR3 b - - 4 15
FEN state: r1q2bn1/2p1pp1r/n1kp2pp/pp6/PP2PP2/3P2P1/2PK2NP/RNBQR3 b - - 4 15 ; Best move: a5b4
The current state of the chess board is: Black rook at a8, black queen at c8, black bishop at f8 and black knight at g8. Black pawn at c7, black pawn at e7, black pawn at f7 and black rook at h7. Black knight at a6, black king at c6, black pawn at d6, black pawn at g6 and black pawn at h6. Black pawn at a5 and black pawn at b5. White pawn at a4, white pawn at b4, white pawn at e4 and white pawn at f4. White pawn at d3 and white pawn at g3. White pawn at c2, white king at d2, white knight at g2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1 and white rook at e1. Both players have exhausted their castles. Half move number is 4. Full move number is 15. Black to move.