1nb1kbn1/1pp2p2/r2qpr2/PN1pN1p1/3P1P2/2P3Pp/P2QP1RP/1RB1KB2 w - - 4 15
FEN state: 1nb1kbn1/1pp2p2/r2qpr2/PN1pN1p1/3P1P2/2P3Pp/P2QP1RP/1RB1KB2 w - - 4 15 ; Best move: b5d6
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black knight at g8. Black pawn at b7, black pawn at c7 and black pawn at f7. Black rook at a6, black queen at d6, black pawn at e6 and black rook at f6. White pawn at a5, white knight at b5, black pawn at d5, white knight at e5 and black pawn at g5. White pawn at d4 and white pawn at f4. White pawn at c3, white pawn at g3 and black pawn at h3. White pawn at a2, white queen at d2, white pawn at e2, white rook at g2 and white pawn at h2. White rook at b1, white bishop at c1, white king at e1 and white bishop at f1. Both players have exhausted their castles. Half move number is 4. Full move number is 15. White to move.