rn1k1b1r/4n1p1/q1p1b2p/pp2Bp2/PPP1p3/RQ1P1P1P/5KN1/5B1R b - - 6 23
FEN state: rn1k1b1r/4n1p1/q1p1b2p/pp2Bp2/PPP1p3/RQ1P1P1P/5KN1/5B1R b - - 6 23 ; Best move: b5c4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at d8, black bishop at f8 and black rook at h8. Black knight at e7 and black pawn at g7. Black queen at a6, black pawn at c6, black bishop at e6 and black pawn at h6. Black pawn at a5, black pawn at b5, white bishop at e5 and black pawn at f5. White pawn at a4, white pawn at b4, white pawn at c4 and black pawn at e4. White rook at a3, white queen at b3, white pawn at d3, white pawn at f3 and white pawn at h3. White king at f2 and white knight at g2. White bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 6. Full move number is 23. Black to move.