r1b2knr/p2p4/n1p2p1p/q7/1pP1Pp1p/bP1P4/P2QK1P1/RNB3NR w - - 0 21
FEN state: r1b2knr/p2p4/n1p2p1p/q7/1pP1Pp1p/bP1P4/P2QK1P1/RNB3NR w - - 0 21 ; Best move: b1a3
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at f8, black knight at g8 and black rook at h8. Black pawn at a7 and black pawn at d7. Black knight at a6, black pawn at c6, black pawn at f6 and black pawn at h6. Black queen at a5. Black pawn at b4, white pawn at c4, white pawn at e4, black pawn at f4 and black pawn at h4. Black bishop at a3, white pawn at b3 and white pawn at d3. White pawn at a2, white queen at d2, white king at e2 and white pawn at g2. White rook at a1, white knight at b1, white bishop at c1, 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.