r4b1r/1p3p1p/n1p1k1p1/p2p2B1/3Pp1PP/6N1/P1b1P3/1R1QKBNR b K - 4 21
FEN state: r4b1r/1p3p1p/n1p1k1p1/p2p2B1/3Pp1PP/6N1/P1b1P3/1R1QKBNR b K - 4 21 ; Best move: c2d1
The current state of the chess board is: Black rook at a8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at f7 and black pawn at h7. Black knight at a6, black pawn at c6, black king at e6 and black pawn at g6. Black pawn at a5, black pawn at d5 and white bishop at g5. White pawn at d4, black pawn at e4, white pawn at g4 and white pawn at h4. White knight at g3. White pawn at a2, black bishop at c2 and white pawn at e2. White rook at b1, white queen at d1, 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 4. Full move number is 21. Black to move.