r3k1nr/1p3pp1/n2b3p/pN1p3P/P4PP1/1PQ1K2b/2P1N3/R1BR4 w q - 1 21
FEN state: r3k1nr/1p3pp1/n2b3p/pN1p3P/P4PP1/1PQ1K2b/2P1N3/R1BR4 w q - 1 21 ; Best move: b5d6
The current state of the chess board is: Black rook at a8, black king at e8, black knight at g8 and black rook at h8. Black pawn at b7, black pawn at f7 and black pawn at g7. Black knight at a6, black bishop at d6 and black pawn at h6. Black pawn at a5, white knight at b5, black pawn at d5 and white pawn at h5. White pawn at a4, white pawn at f4 and white pawn at g4. White pawn at b3, white queen at c3, white king at e3 and black bishop at h3. White pawn at c2 and white knight at e2. White rook at a1, white bishop at c1 and white rook at d1. Black queenside is the only castle move available. Half move number is 1. Full move number is 21. White to move.