rn4nr/pqp2k2/P5p1/P1pppp1p/8/3PPBP1/4QP1P/RNb1K1NR b KQ - 1 18
FEN state: rn4nr/pqp2k2/P5p1/P1pppp1p/8/3PPBP1/4QP1P/RNb1K1NR b KQ - 1 18 ; Best move: b7b4
The current state of the chess board is: Black rook at a8, black knight at b8, black knight at g8 and black rook at h8. Black pawn at a7, black queen at b7, black pawn at c7 and black king at f7. White pawn at a6 and black pawn at g6. White pawn at a5, black pawn at c5, black pawn at d5, black pawn at e5, black pawn at f5 and black pawn at h5. White pawn at d3, white pawn at e3, white bishop at f3 and white pawn at g3. White queen at e2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, black bishop at c1, white king at e1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 1. Full move number is 18. Black to move.