1rb1kq1r/Np1pb3/4p1p1/2pn1p2/1NP4p/3PP1PB/P4PKP/R1BQ1R2 w k - 3 18
FEN state: 1rb1kq1r/Np1pb3/4p1p1/2pn1p2/1NP4p/3PP1PB/P4PKP/R1BQ1R2 w k - 3 18 ; Best move: b4d5
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black queen at f8 and black rook at h8. White knight at a7, black pawn at b7, black pawn at d7 and black bishop at e7. Black pawn at e6 and black pawn at g6. Black pawn at c5, black knight at d5 and black pawn at f5. White knight at b4, white pawn at c4 and black pawn at h4. White pawn at d3, white pawn at e3, white pawn at g3 and white bishop at h3. White pawn at a2, white pawn at f2, white king at g2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1 and white rook at f1. Black kingside is the only castle move available. Half move number is 3. Full move number is 18. White to move.