rn3k1r/pq1pn3/b6p/1p2pp2/1pPb1PPp/P2BP3/1Q1P1K2/RNB3NR w - - 2 20
FEN state: rn3k1r/pq1pn3/b6p/1p2pp2/1pPb1PPp/P2BP3/1Q1P1K2/RNB3NR w - - 2 20 ; Best move: b2b4
The current state of the chess board is: Black rook at a8, black knight at b8, black king at f8 and black rook at h8. Black pawn at a7, black queen at b7, black pawn at d7 and black knight at e7. Black bishop at a6 and black pawn at h6. Black pawn at b5, black pawn at e5 and black pawn at f5. Black pawn at b4, white pawn at c4, black bishop at d4, white pawn at f4, white pawn at g4 and black pawn at h4. White pawn at a3, white bishop at d3 and white pawn at e3. White queen at b2, white pawn at d2 and white king at f2. 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 2. Full move number is 20. White to move.