rn1k3r/pp3pb1/1N1p4/q1pPp1pp/P4P2/3b2P1/1PPNP2P/R1BQK2R w - - 0 18
FEN state: rn1k3r/pp3pb1/1N1p4/q1pPp1pp/P4P2/3b2P1/1PPNP2P/R1BQK2R w - - 0 18 ; Best move: b6a8
The current state of the chess board is: Black rook at a8, black knight at b8, black king at d8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at f7 and black bishop at g7. White knight at b6 and black pawn at d6. Black queen at a5, black pawn at c5, white pawn at d5, black pawn at e5, black pawn at g5 and black pawn at h5. White pawn at a4 and white pawn at f4. Black bishop at d3 and white pawn at g3. White pawn at b2, white pawn at c2, white knight at d2, white pawn at e2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1, white king at e1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. White to move.