r1b2qr1/2pp4/pQn4p/P3pppk/1p1b3P/RP4P1/2PNPP2/3KBBNR b - - 1 21
FEN state: r1b2qr1/2pp4/pQn4p/P3pppk/1p1b3P/RP4P1/2PNPP2/3KBBNR b - - 1 21 ; Best move: b4a3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at f8 and black rook at g8. Black pawn at c7 and black pawn at d7. Black pawn at a6, white queen at b6, black knight at c6 and black pawn at h6. White pawn at a5, black pawn at e5, black pawn at f5, black pawn at g5 and black king at h5. Black pawn at b4, black bishop at d4 and white pawn at h4. White rook at a3, white pawn at b3 and white pawn at g3. White pawn at c2, white knight at d2, white pawn at e2 and white pawn at f2. White king at d1, white bishop at e1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. Black to move.