4k2r/1b2n3/1p3pp1/3p3p/r2Pp2P/4P1P1/2P3KR/RNb3N1 w - - 2 21
FEN state: 4k2r/1b2n3/1p3pp1/3p3p/r2Pp2P/4P1P1/2P3KR/RNb3N1 w - - 2 21 ; Best move: a1a4
The current state of the chess board is: Black king at e8 and black rook at h8. Black bishop at b7 and black knight at e7. Black pawn at b6, black pawn at f6 and black pawn at g6. Black pawn at d5 and black pawn at h5. Black rook at a4, white pawn at d4, black pawn at e4 and white pawn at h4. White pawn at e3 and white pawn at g3. White pawn at c2, white king at g2 and white rook at h2. White rook at a1, white knight at b1, black bishop at c1 and white knight at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 21. White to move.