2r1kbn1/1p2pp2/p1pp2p1/1B5r/1P1B3p/P1NqPnPP/2PPKP2/R1N2R2 w - - 4 20
FEN state: 2r1kbn1/1p2pp2/p1pp2p1/1B5r/1P1B3p/P1NqPnPP/2PPKP2/R1N2R2 w - - 4 20 ; Best move: b5d3
The current state of the chess board is: Black rook at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at b7, black pawn at e7 and black pawn at f7. Black pawn at a6, black pawn at c6, black pawn at d6 and black pawn at g6. White bishop at b5 and black rook at h5. White pawn at b4, white bishop at d4 and black pawn at h4. White pawn at a3, white knight at c3, black queen at d3, white pawn at e3, black knight at f3, white pawn at g3 and white pawn at h3. White pawn at c2, white pawn at d2, white king at e2 and white pawn at f2. White rook at a1, white knight at c1 and white rook at f1. Both players have exhausted their castles. Half move number is 4. Full move number is 20. White to move.