nr4nr/pb3k1p/4qppb/2p5/pP4P1/R2P3N/2P1PPRP/4KB2 w - - 2 23
FEN state: nr4nr/pb3k1p/4qppb/2p5/pP4P1/R2P3N/2P1PPRP/4KB2 w - - 2 23 ; Best move: b4b5
The current state of the chess board is: Black knight at a8, black rook at b8, black knight at g8 and black rook at h8. Black pawn at a7, black bishop at b7, black king at f7 and black pawn at h7. Black queen at e6, black pawn at f6, black pawn at g6 and black bishop at h6. Black pawn at c5. Black pawn at a4, white pawn at b4 and white pawn at g4. White rook at a3, white pawn at d3 and white knight at h3. White pawn at c2, white pawn at e2, white pawn at f2, white rook at g2 and white pawn at h2. White king at e1 and white bishop at f1. Both players have exhausted their castles. Half move number is 2. Full move number is 23. White to move.