1n3b2/r1pk1p2/2qpp2r/pp4pp/PPB1P1n1/2N3KQ/1BPP2PP/R5NR w - - 0 21
FEN state: 1n3b2/r1pk1p2/2qpp2r/pp4pp/PPB1P1n1/2N3KQ/1BPP2PP/R5NR w - - 0 21 ; Best move: c4b5
The current state of the chess board is: Black knight at b8 and black bishop at f8. Black rook at a7, black pawn at c7, black king at d7 and black pawn at f7. Black queen at c6, black pawn at d6, black pawn at e6 and black rook at h6. Black pawn at a5, black pawn at b5, black pawn at g5 and black pawn at h5. White pawn at a4, white pawn at b4, white bishop at c4, white pawn at e4 and black knight at g4. White knight at c3, white king at g3 and white queen at h3. White bishop at b2, white pawn at c2, white pawn at d2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 21. White to move.