1r2kbn1/pq1bp1pr/3p1p2/Ppp3P1/3P3p/2Nn1P1B/2PBN1KP/1R1Q3R b - - 4 21
FEN state: 1r2kbn1/pq1bp1pr/3p1p2/Ppp3P1/3P3p/2Nn1P1B/2PBN1KP/1R1Q3R b - - 4 21 ; Best move: d7h3
The current state of the chess board is: Black rook at b8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at a7, black queen at b7, black bishop at d7, black pawn at e7, black pawn at g7 and black rook at h7. Black pawn at d6 and black pawn at f6. White pawn at a5, black pawn at b5, black pawn at c5 and white pawn at g5. White pawn at d4 and black pawn at h4. White knight at c3, black knight at d3, white pawn at f3 and white bishop at h3. White pawn at c2, white bishop at d2, white knight at e2, white king at g2 and white pawn at h2. White rook at b1, white queen at d1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 21. Black to move.