1r2k2r/Q1pn1p1p/1pn5/3ppPp1/p1B1P2q/P1N5/RPPPK1Pb/2B5 b k - 0 21
FEN state: 1r2k2r/Q1pn1p1p/1pn5/3ppPp1/p1B1P2q/P1N5/RPPPK1Pb/2B5 b k - 0 21 ; Best move: c6a7
The current state of the chess board is: Black rook at b8, black king at e8 and black rook at h8. White queen at a7, black pawn at c7, black knight at d7, black pawn at f7 and black pawn at h7. Black pawn at b6 and black knight at c6. Black pawn at d5, black pawn at e5, white pawn at f5 and black pawn at g5. Black pawn at a4, white bishop at c4, white pawn at e4 and black queen at h4. White pawn at a3 and white knight at c3. White rook at a2, white pawn at b2, white pawn at c2, white pawn at d2, white king at e2, white pawn at g2 and black bishop at h2. White bishop at c1. Black kingside is the only castle move available. Half move number is 0. Full move number is 21. Black to move.