rn3bnr/1b1p1pp1/p1p3k1/1P6/P1Rq2pP/RP2P3/4QP2/1NB1KBN1 b - - 2 20
FEN state: rn3bnr/1b1p1pp1/p1p3k1/1P6/P1Rq2pP/RP2P3/4QP2/1NB1KBN1 b - - 2 20 ; Best move: d4d5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at f8, black knight at g8 and black rook at h8. Black bishop at b7, black pawn at d7, black pawn at f7 and black pawn at g7. Black pawn at a6, black pawn at c6 and black king at g6. White pawn at b5. White pawn at a4, white rook at c4, black queen at d4, black pawn at g4 and white pawn at h4. White rook at a3, white pawn at b3 and white pawn at e3. White queen at e2 and white pawn at f2. White knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white knight at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. Black to move.