1n2k2r/1b1p1p2/r1p1p3/1p4Bp/pPPP3P/P3R1P1/3NP1P1/R2QKBN1 w Q - 1 20
FEN state: 1n2k2r/1b1p1p2/r1p1p3/1p4Bp/pPPP3P/P3R1P1/3NP1P1/R2QKBN1 w Q - 1 20 ; Best move: d2e4
The current state of the chess board is: Black knight at b8, black king at e8 and black rook at h8. Black bishop at b7, black pawn at d7 and black pawn at f7. Black rook at a6, black pawn at c6 and black pawn at e6. Black pawn at b5, white bishop at g5 and black pawn at h5. Black pawn at a4, white pawn at b4, white pawn at c4, white pawn at d4 and white pawn at h4. White pawn at a3, white rook at e3 and white pawn at g3. White knight at d2, white pawn at e2 and white pawn at g2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white knight at g1. White queenside is the only castle move available. Half move number is 1. Full move number is 20. White to move.