r1b5/ppkn1rq1/3p3b/P3pppB/1pPNP2P/8/1B1P1P1P/RN1Q1RK1 b - - 0 21
FEN state: r1b5/ppkn1rq1/3p3b/P3pppB/1pPNP2P/8/1B1P1P1P/RN1Q1RK1 b - - 0 21 ; Best move: e5d4
The current state of the chess board is: Black rook at a8 and black bishop at c8. Black pawn at a7, black pawn at b7, black king at c7, black knight at d7, black rook at f7 and black queen at g7. Black pawn at d6 and black bishop at h6. White pawn at a5, black pawn at e5, black pawn at f5, black pawn at g5 and white bishop at h5. Black pawn at b4, white pawn at c4, white knight at d4, white pawn at e4 and white pawn at h4. White bishop at b2, white pawn at d2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, white queen at d1, white rook at f1 and white king at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. Black to move.