r2q1r2/pbpppk1p/n4b1n/3N1pp1/1P2PP2/1P4P1/1BPPK2P/R2Q1BNR w - - 1 20
FEN state: r2q1r2/pbpppk1p/n4b1n/3N1pp1/1P2PP2/1P4P1/1BPPK2P/R2Q1BNR w - - 1 20 ; Best move: d5f6
The current state of the chess board is: Black rook at a8, black queen at d8 and black rook at f8. Black pawn at a7, black bishop at b7, black pawn at c7, black pawn at d7, black pawn at e7, black king at f7 and black pawn at h7. Black knight at a6, black bishop at f6 and black knight at h6. White knight at d5, black pawn at f5 and black pawn at g5. White pawn at b4, white pawn at e4 and white pawn at f4. White pawn at b3 and white pawn at g3. White bishop at b2, white pawn at c2, white pawn at d2, white king at e2 and white pawn at h2. White rook at a1, white queen at d1, white bishop at f1, 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.