rnb1kb1r/1p6/4pp1n/1ppp3p/1P1q1P2/2N1PQ2/P1P2NPP/R1B1K1R1 w Q - 2 21
FEN state: rnb1kb1r/1p6/4pp1n/1ppp3p/1P1q1P2/2N1PQ2/P1P2NPP/R1B1K1R1 w Q - 2 21 ; Best move: e3d4
The current state of the chess board is: Black rook at a8, black knight 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 e6, black pawn at f6 and black knight at h6. Black pawn at b5, black pawn at c5, black pawn at d5 and black pawn at h5. White pawn at b4, black queen at d4 and white pawn at f4. White knight at c3, white pawn at e3 and white queen at f3. White pawn at a2, white pawn at c2, white knight at f2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1 and white rook at g1. White queenside is the only castle move available. Half move number is 2. Full move number is 21. White to move.