rq2kbr1/1p2p2p/1n2bp1n/p1pp4/3P1p2/4B1PN/PPP1PK1P/RN1Q1BR1 w q - 0 15
FEN state: rq2kbr1/1p2p2p/1n2bp1n/p1pp4/3P1p2/4B1PN/PPP1PK1P/RN1Q1BR1 w q - 0 15 ; Best move: e3f4
The current state of the chess board is: Black rook at a8, black queen at b8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at b7, black pawn at e7 and black pawn at h7. Black knight at b6, black bishop at e6, black pawn at f6 and black knight at h6. Black pawn at a5, black pawn at c5 and black pawn at d5. White pawn at d4 and black pawn at f4. White bishop at e3, white pawn at g3 and white knight at h3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at e2, white king at f2 and white pawn at h2. White rook at a1, white knight at b1, white queen at d1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 15. White to move.