r3k1r1/pb3Nq1/1ppp3b/2n1p2p/1P2BPpP/P1P1P3/RB1P1R1P/1N1Q2K1 w q - 3 21
FEN state: r3k1r1/pb3Nq1/1ppp3b/2n1p2p/1P2BPpP/P1P1P3/RB1P1R1P/1N1Q2K1 w q - 3 21 ; Best move: f7d6
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at g8. Black pawn at a7, black bishop at b7, white knight at f7 and black queen at g7. Black pawn at b6, black pawn at c6, black pawn at d6 and black bishop at h6. Black knight at c5, black pawn at e5 and black pawn at h5. White pawn at b4, white bishop at e4, white pawn at f4, black pawn at g4 and white pawn at h4. White pawn at a3, white pawn at c3 and white pawn at e3. White rook at a2, white bishop at b2, white pawn at d2, white rook at f2 and white pawn at h2. White knight at b1, white queen at d1 and white king at g1. Black queenside is the only castle move available. Half move number is 3. Full move number is 21. White to move.