r1bk1bn1/1p5r/5np1/p1pp3p/1P5q/3p2BN/P1P2PP1/R2QKB1R b - - 5 20
FEN state: r1bk1bn1/1p5r/5np1/p1pp3p/1P5q/3p2BN/P1P2PP1/R2QKB1R b - - 5 20 ; Best move: h7e7
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 knight at g8. Black pawn at b7 and black rook at h7. Black knight at f6 and black pawn at g6. Black pawn at a5, black pawn at c5, black pawn at d5 and black pawn at h5. White pawn at b4 and black queen at h4. Black pawn at d3, white bishop at g3 and white knight at h3. White pawn at a2, white pawn at c2, white pawn at f2 and white pawn at g2. White rook at a1, white queen at d1, white king at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 5. Full move number is 20. Black to move.