4kbr1/4np2/rpn3p1/1Pppp1N1/Q1q4p/2P1PP2/P2P3P/RNB3KR w - - 0 18
FEN state: 4kbr1/4np2/rpn3p1/1Pppp1N1/Q1q4p/2P1PP2/P2P3P/RNB3KR w - - 0 18 ; Best move: a4c4
The current state of the chess board is: Black king at e8, black bishop at f8 and black rook at g8. Black knight at e7 and black pawn at f7. Black rook at a6, black pawn at b6, black knight at c6 and black pawn at g6. White pawn at b5, black pawn at c5, black pawn at d5, black pawn at e5 and white knight at g5. White queen at a4, black queen at c4 and black pawn at h4. White pawn at c3, white pawn at e3 and white pawn at f3. White pawn at a2, white pawn at d2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, white king at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. White to move.