r1b1B3/1p2k2p/2p1p3/p4pp1/1n1N2P1/PPP4P/3P1K2/RNB2B1R w - - 2 20
FEN state: r1b1B3/1p2k2p/2p1p3/p4pp1/1n1N2P1/PPP4P/3P1K2/RNB2B1R w - - 2 20 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black bishop at c8 and white bishop at e8. Black pawn at b7, black king at e7 and black pawn at h7. Black pawn at c6 and black pawn at e6. Black pawn at a5, black pawn at f5 and black pawn at g5. Black knight at b4, white knight at d4 and white pawn at g4. White pawn at a3, white pawn at b3, white pawn at c3 and white pawn at h3. White pawn at d2 and white king at f2. White rook at a1, white knight at b1, white bishop at c1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. White to move.