r1bk1b1r/1ppB2p1/3p1nn1/p1q5/P2Pp3/1PP2P2/R3P1KP/1NB3NR w - - 1 20
FEN state: r1bk1b1r/1ppB2p1/3p1nn1/p1q5/P2Pp3/1PP2P2/R3P1KP/1NB3NR w - - 1 20 ; Best move: d4c5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at d8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at c7, white bishop at d7 and black pawn at g7. Black pawn at d6, black knight at f6 and black knight at g6. Black pawn at a5 and black queen at c5. White pawn at a4, white pawn at d4 and black pawn at e4. White pawn at b3, white pawn at c3 and white pawn at f3. White rook at a2, white pawn at e2, white king at g2 and white pawn at h2. White knight at b1, white bishop at c1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. White to move.