r1bq1rn1/1pp1n1pp/6k1/3ppp2/pb1PPPPP/1P6/P1P1BQ1R/RNBK2N1 b - - 4 17
FEN state: r1bq1rn1/1pp1n1pp/6k1/3ppp2/pb1PPPPP/1P6/P1P1BQ1R/RNBK2N1 b - - 4 17 ; Best move: f5g4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black rook at f8 and black knight at g8. Black pawn at b7, black pawn at c7, black knight at e7, black pawn at g7 and black pawn at h7. Black king at g6. Black pawn at d5, black pawn at e5 and black pawn at f5. Black pawn at a4, black bishop at b4, white pawn at d4, white pawn at e4, white pawn at f4, white pawn at g4 and white pawn at h4. White pawn at b3. White pawn at a2, white pawn at c2, white bishop at e2, white queen at f2 and white rook at h2. White rook at a1, white knight at b1, white bishop at c1, white king at d1 and white knight at g1. Both players have exhausted their castles. Half move number is 4. Full move number is 17. Black to move.