rn2k1r1/1bp1qp1p/pp1p2pR/3N2P1/6P1/3PBP2/PP2K1B1/R5N1 b q - 2 21
FEN state: rn2k1r1/1bp1qp1p/pp1p2pR/3N2P1/6P1/3PBP2/PP2K1B1/R5N1 b q - 2 21 ; Best move: b7d5
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black rook at g8. Black bishop at b7, black pawn at c7, black queen at e7, black pawn at f7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at d6, black pawn at g6 and white rook at h6. White knight at d5 and white pawn at g5. White pawn at g4. White pawn at d3, white bishop at e3 and white pawn at f3. White pawn at a2, white pawn at b2, white king at e2 and white bishop at g2. White rook at a1 and white knight at g1. Black queenside is the only castle move available. Half move number is 2. Full move number is 21. Black to move.