rnbq1kr1/5pb1/1p1p3p/p1n1p1P1/1P6/P1pPPPBP/2P5/RN1QKBNR w K - 1 18
FEN state: rnbq1kr1/5pb1/1p1p3p/p1n1p1P1/1P6/P1pPPPBP/2P5/RN1QKBNR w K - 1 18 ; Best move: b4c5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at f8 and black rook at g8. Black pawn at f7 and black bishop at g7. Black pawn at b6, black pawn at d6 and black pawn at h6. Black pawn at a5, black knight at c5, black pawn at e5 and white pawn at g5. White pawn at b4. White pawn at a3, black pawn at c3, white pawn at d3, white pawn at e3, white pawn at f3, white bishop at g3 and white pawn at h3. White pawn at c2. White rook at a1, white knight at b1, white queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 1. Full move number is 18. White to move.