1r1q1bnr/p1pk1p1p/3pp3/p5n1/b2PP3/NPP2p2/2K3PP/R1BQ1BNR w - - 1 20
FEN state: 1r1q1bnr/p1pk1p1p/3pp3/p5n1/b2PP3/NPP2p2/2K3PP/R1BQ1BNR w - - 1 20 ; Best move: b3a4
The current state of the chess board is: Black rook at b8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at c7, black king at d7, black pawn at f7 and black pawn at h7. Black pawn at d6 and black pawn at e6. Black pawn at a5 and black knight at g5. Black bishop at a4, white pawn at d4 and white pawn at e4. White knight at a3, white pawn at b3, white pawn at c3 and black pawn at f3. White king at c2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. White to move.