rn1q1k2/p1p1ppb1/b4n2/1Bppr2p/1Q1PPPR1/P3B3/RP2K1P1/1N4N1 w - - 1 21
FEN state: rn1q1k2/p1p1ppb1/b4n2/1Bppr2p/1Q1PPPR1/P3B3/RP2K1P1/1N4N1 w - - 1 21 ; Best move: b4a5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8 and black king at f8. Black pawn at a7, black pawn at c7, black pawn at e7, black pawn at f7 and black bishop at g7. Black bishop at a6 and black knight at f6. White bishop at b5, black pawn at c5, black pawn at d5, black rook at e5 and black pawn at h5. White queen at b4, white pawn at d4, white pawn at e4, white pawn at f4 and white rook at g4. White pawn at a3 and white bishop at e3. White rook at a2, white pawn at b2, white king at e2 and white pawn at g2. White knight at b1 and white knight at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 21. White to move.