r5nr/pqkp4/np2p2p/2p2b1P/P1P3p1/3PbPpN/1P2P1B1/1RBQ1KR1 b - - 2 21
FEN state: r5nr/pqkp4/np2p2p/2p2b1P/P1P3p1/3PbPpN/1P2P1B1/1RBQ1KR1 b - - 2 21 ; Best move: g4h3
The current state of the chess board is: Black rook at a8, black knight at g8 and black rook at h8. Black pawn at a7, black queen at b7, black king at c7 and black pawn at d7. Black knight at a6, black pawn at b6, black pawn at e6 and black pawn at h6. Black pawn at c5, black bishop at f5 and white pawn at h5. White pawn at a4, white pawn at c4 and black pawn at g4. White pawn at d3, black bishop at e3, white pawn at f3, black pawn at g3 and white knight at h3. White pawn at b2, white pawn at e2 and white bishop at g2. White rook at b1, white bishop at c1, white queen at d1, white king at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. Black to move.