r1b4r/p2nbp2/2p1p1pp/5NB1/Pk1p3P/1PnPP1q1/R2Q1P2/4KBNR b K - 1 21
FEN state: r1b4r/p2nbp2/2p1p1pp/5NB1/Pk1p3P/1PnPP1q1/R2Q1P2/4KBNR b K - 1 21 ; Best move: h6g5
The current state of the chess board is: Black rook at a8, black bishop at c8 and black rook at h8. Black pawn at a7, black knight at d7, black bishop at e7 and black pawn at f7. Black pawn at c6, black pawn at e6, black pawn at g6 and black pawn at h6. White knight at f5 and white bishop at g5. White pawn at a4, black king at b4, black pawn at d4 and white pawn at h4. White pawn at b3, black knight at c3, white pawn at d3, white pawn at e3 and black queen at g3. White rook at a2, white queen at d2 and white pawn at f2. White king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 21. Black to move.