r3k1nr/5pp1/bpp1pn1p/p5B1/PQ1pP3/P1PP1RPP/8/RN2K1N1 w Q - 6 20
FEN state: r3k1nr/5pp1/bpp1pn1p/p5B1/PQ1pP3/P1PP1RPP/8/RN2K1N1 w Q - 6 20 ; Best move: b4b6
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 f7 and black pawn at g7. Black bishop at a6, black pawn at b6, black pawn at c6, black pawn at e6, black knight at f6 and black pawn at h6. Black pawn at a5 and white bishop at g5. White pawn at a4, white queen at b4, black pawn at d4 and white pawn at e4. White pawn at a3, white pawn at c3, white pawn at d3, white rook at f3, white pawn at g3 and white pawn at h3. White rook at a1, white knight at b1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 6. Full move number is 20. White to move.