1r2kr2/p1qb1ppp/n2bp2B/1Qp5/1PPp4/N2P1N1P/P2K1PP1/3R1B1R w - - 0 20
FEN state: 1r2kr2/p1qb1ppp/n2bp2B/1Qp5/1PPp4/N2P1N1P/P2K1PP1/3R1B1R w - - 0 20 ; Best move: b5a6
The current state of the chess board is: Black rook at b8, black king at e8 and black rook at f8. Black pawn at a7, black queen at c7, black bishop at d7, black pawn at f7, black pawn at g7 and black pawn at h7. Black knight at a6, black bishop at d6, black pawn at e6 and white bishop at h6. White queen at b5 and black pawn at c5. White pawn at b4, white pawn at c4 and black pawn at d4. White knight at a3, white pawn at d3, white knight at f3 and white pawn at h3. White pawn at a2, white king at d2, white pawn at f2 and white pawn at g2. White rook at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. White to move.