rnbk3r/p5p1/2p5/1p1npp1p/3PP3/3KPP1P/Bb1BQ1P1/RN4NR b - - 5 20
FEN state: rnbk3r/p5p1/2p5/1p1npp1p/3PP3/3KPP1P/Bb1BQ1P1/RN4NR b - - 5 20 ; Best move: d5b6
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at d8 and black rook at h8. Black pawn at a7 and black pawn at g7. Black pawn at c6. Black pawn at b5, black knight at d5, black pawn at e5, black pawn at f5 and black pawn at h5. White pawn at d4 and white pawn at e4. White king at d3, white pawn at e3, white pawn at f3 and white pawn at h3. White bishop at a2, black bishop at b2, white bishop at d2, white queen at e2 and white pawn at g2. White rook at a1, white knight at b1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 5. Full move number is 20. Black to move.