1nb3nr/r1p3bp/p3p1p1/1p1p1pk1/1P2P3/N1P4P/P2PBP1K/R1BQ2NR b - - 3 20
FEN state: 1nb3nr/r1p3bp/p3p1p1/1p1p1pk1/1P2P3/N1P4P/P2PBP1K/R1BQ2NR b - - 3 20 ; Best move: d5e4
The current state of the chess board is: Black knight at b8, black bishop at c8, black knight at g8 and black rook at h8. Black rook at a7, black pawn at c7, black bishop at g7 and black pawn at h7. Black pawn at a6, black pawn at e6 and black pawn at g6. Black pawn at b5, black pawn at d5, black pawn at f5 and black king at g5. White pawn at b4 and white pawn at e4. White knight at a3, white pawn at c3 and white pawn at h3. White pawn at a2, white pawn at d2, white bishop at e2, white pawn at f2 and white king at h2. White rook at a1, white bishop at c1, white queen at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 3. Full move number is 20. Black to move.