1rb1kb1r/1pp1pp1p/p2q1n2/nN6/P3Pp1Q/3p2PP/1PPP1K2/RNB2BR1 w k - 6 21
FEN state: 1rb1kb1r/1pp1pp1p/p2q1n2/nN6/P3Pp1Q/3p2PP/1PPP1K2/RNB2BR1 w k - 6 21 ; Best move: b5d6
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at e7, black pawn at f7 and black pawn at h7. Black pawn at a6, black queen at d6 and black knight at f6. Black knight at a5 and white knight at b5. White pawn at a4, white pawn at e4, black pawn at f4 and white queen at h4. Black pawn at d3, white pawn at g3 and white pawn at h3. White pawn at b2, white pawn at c2, white pawn at d2 and white king at f2. White rook at a1, white knight at b1, white bishop at c1, white bishop at f1 and white rook at g1. Black kingside is the only castle move available. Half move number is 6. Full move number is 21. White to move.