1nb2knr/7p/r2pp2b/p7/qP1P1p2/NP1K1PB1/1P2P1PP/1R3BNR b - - 0 20
FEN state: 1nb2knr/7p/r2pp2b/p7/qP1P1p2/NP1K1PB1/1P2P1PP/1R3BNR b - - 0 20 ; Best move: a4b3
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at f8, black knight at g8 and black rook at h8. Black pawn at h7. Black rook at a6, black pawn at d6, black pawn at e6 and black bishop at h6. Black pawn at a5. Black queen at a4, white pawn at b4, white pawn at d4 and black pawn at f4. White knight at a3, white pawn at b3, white king at d3, white pawn at f3 and white bishop at g3. White pawn at b2, white pawn at e2, white pawn at g2 and white pawn at h2. White rook at b1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. Black to move.