rn2k1n1/ppq3p1/4ppr1/P2p3p/b1pP2P1/b1N5/1PPKPP1P/2BQ1B1R w q - 4 15
FEN state: rn2k1n1/ppq3p1/4ppr1/P2p3p/b1pP2P1/b1N5/1PPKPP1P/2BQ1B1R w q - 4 15 ; Best move: b2a3
The current state of the chess board is: Black rook at a8, black knight at b8, black king at e8 and black knight at g8. Black pawn at a7, black pawn at b7, black queen at c7 and black pawn at g7. Black pawn at e6, black pawn at f6 and black rook at g6. White pawn at a5, black pawn at d5 and black pawn at h5. Black bishop at a4, black pawn at c4, white pawn at d4 and white pawn at g4. Black bishop at a3 and white knight at c3. White pawn at b2, white pawn at c2, white king at d2, white pawn at e2, white pawn at f2 and white pawn at h2. White bishop at c1, white queen at d1, white bishop at f1 and white rook at h1. Black queenside is the only castle move available. Half move number is 4. Full move number is 15. White to move.