r4b1r/p2b1pp1/nqp1p3/1P1P1kpn/2p2P2/2N1BN1P/1P2P1P1/R3KB1R w - - 1 20
FEN state: r4b1r/p2b1pp1/nqp1p3/1P1P1kpn/2p2P2/2N1BN1P/1P2P1P1/R3KB1R w - - 1 20 ; Best move: g2g4
The current state of the chess board is: Black rook at a8, black bishop at f8 and black rook at h8. Black pawn at a7, black bishop at d7, black pawn at f7 and black pawn at g7. Black knight at a6, black queen at b6, black pawn at c6 and black pawn at e6. White pawn at b5, white pawn at d5, black king at f5, black pawn at g5 and black knight at h5. Black pawn at c4 and white pawn at f4. White knight at c3, white bishop at e3, white knight at f3 and white pawn at h3. White pawn at b2, white pawn at e2 and white pawn at g2. White rook at a1, white king at e1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. White to move.