rnb4r/6k1/p1pnp3/bp1pPBpp/PBP3PP/1P2P3/2Q2P2/R4KNR w - - 0 21
FEN state: rnb4r/6k1/p1pnp3/bp1pPBpp/PBP3PP/1P2P3/2Q2P2/R4KNR w - - 0 21 ; Best move: b4a5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black rook at h8. Black king at g7. Black pawn at a6, black pawn at c6, black knight at d6 and black pawn at e6. Black bishop at a5, black pawn at b5, black pawn at d5, white pawn at e5, white bishop at f5, black pawn at g5 and black pawn at h5. White pawn at a4, white bishop at b4, white pawn at c4, white pawn at g4 and white pawn at h4. White pawn at b3 and white pawn at e3. White queen at c2 and white pawn at f2. White rook at a1, white king 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 21. White to move.