1r3knr/p1p2p2/np1pp1p1/1Nq3Pp/2P1b2N/P2P3B/RP1KPP1P/2B4R w - - 2 21
FEN state: 1r3knr/p1p2p2/np1pp1p1/1Nq3Pp/2P1b2N/P2P3B/RP1KPP1P/2B4R w - - 2 21 ; Best move: d3e4
The current state of the chess board is: Black rook at b8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7 and black pawn at f7. Black knight at a6, black pawn at b6, black pawn at d6, black pawn at e6 and black pawn at g6. White knight at b5, black queen at c5, white pawn at g5 and black pawn at h5. White pawn at c4, black bishop at e4 and white knight at h4. White pawn at a3, white pawn at d3 and white bishop at h3. White rook at a2, white pawn at b2, white king at d2, white pawn at e2, white pawn at f2 and white pawn at h2. White bishop at c1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. White to move.