r2qkb1r/1b1p1p1p/pp6/1np1pnP1/2P2Q1P/4P3/PP1NN1P1/R1B1KB1R b kq - 4 12
FEN state: r2qkb1r/1b1p1p1p/pp6/1np1pnP1/2P2Q1P/4P3/PP1NN1P1/R1B1KB1R b kq - 4 12 ; Best move: e5f4
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black bishop at b7, black pawn at d7, black pawn at f7 and black pawn at h7. Black pawn at a6 and black pawn at b6. Black knight at b5, black pawn at c5, black pawn at e5, black knight at f5 and white pawn at g5. White pawn at c4, white queen at f4 and white pawn at h4. White pawn at e3. White pawn at a2, white pawn at b2, white knight at d2, white knight at e2 and white pawn at g2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 4. Full move number is 12. Black to move.