r1b1kb2/pp1p1p1p/BqpB1r2/1N4P1/Q3PP2/2pK4/PP4P1/3R2NR w - - 1 21
FEN state: r1b1kb2/pp1p1p1p/BqpB1r2/1N4P1/Q3PP2/2pK4/PP4P1/3R2NR w - - 1 21 ; Best move: b5c7
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black bishop at f8. Black pawn at a7, black pawn at b7, black pawn at d7, black pawn at f7 and black pawn at h7. White bishop at a6, black queen at b6, black pawn at c6, white bishop at d6 and black rook at f6. White knight at b5 and white pawn at g5. White queen at a4, white pawn at e4 and white pawn at f4. Black pawn at c3 and white king at d3. White pawn at a2, white pawn at b2 and white pawn at g2. White rook at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. White to move.