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Analyzers

Overall Search Quality

This rating helps to assess the overall quality of search for each search engine. It is based on the results of all the special analyzers, the analyzers of 'Clicks' and 'Updates' being excluded, since their results have a purely informational value.

The overall rating is calculated as follows:
1) For each special analyzer, the search engines' scores are normalized to 100 with respect to the best score. This is done in order to eliminate the differencies between the scoring scales of various analyzers.
2) For each analyzer, the normalized search engine scores are multiplied by the specific coefficient assigned to that analyzer. These coefficients reflect our understanding of how important the given feature / type of search is for the overall search quality. If in your opinion some search features have more or less merit for the overall search, please feel free to adjust the coefficients of the corresponding analyzers by moving the sliders on top of this page. Once you adjust the weights, the overall search quality scores will be recalculated.
3) Thereafter the numbers obtained are added up and divided by the sum of the coefficients. This operation yields a number in the range between 1 and 100 that represents the overall search quality of the search engine.

Google	81.2	▼1
Yandex.com	63.0	▼0.2
Ask	42.4	▲0.2
Yandex	38.1	▼2.6
Yahoo	20.2	▲0.5
Bing	16.9	▼4.8
Rambler	N/A

90−100%
80−90%
60−80%
40−60%
20−40%
0−20%

1 ... 44 45 46 47 48 49 50 51 52 53 54
Date	Ask	Bing	Google	Yahoo	Yandex	Yandex.com
03/21/2011	42.4	16.9	81.2	20.2	38.1	63.0
03/20/2011	42.2	21.7	82.2	19.7	40.7	63.2
03/19/2011	40.8	18.6	81.7	21.4	37.9	62.6
03/18/2011	38.8	16.8	80.9	19.7	43.5	60.2
03/17/2011	41.2	17.0	82.5	20.8	44.3	58.9
03/16/2011	40.5	16.7	81.2	20.1	43.3	57.5
03/15/2011	37.4	17.6	81.4	22.1	39.5	56.1
03/14/2011	41.1	17.1	80.8	24.4	38.7	59.0
03/13/2011	39.8	15.6	83.0	24.5	43.7	57.6
03/12/2011	42.6	18.2	80.9	22.8	43.2	62.8
03/11/2011	39.0	16.3	80.1	23.1	38.9	57.5
03/10/2011	55.0	29.7	64.6	32.9	46.6	66.6
03/09/2011	41.9	14.4	77.7	25.8	43.8	62.9
03/08/2011	36.9	18.3	78.0	16.3	39.7	56.9
03/07/2011	41.0	25.9	82.8	17.5	39.5	61.7
03/06/2011	46.7	26.4	78.1	18.9	40.1	59.7
03/05/2011	35.9	31.1	74.4	14.5	43.9	57.5
03/04/2011	55.0	34.6	81.4	27.0	50.1	68.3
03/03/2011	44.6	25.9	79.8	23.8	32.8	52.6
03/02/2011	42.1	28.9	73.3	16.0	38.4	53.2
03/01/2011	52.4	41.8	81.3	15.3	29.8	53.3
02/28/2011	39.5	23.4	73.8	34.2	44.0	53.9
02/27/2011	55.6	15.2	77.2	43.5	53.1	67.4
02/26/2011	64.1	3.8	74.2	45.6	59.6	70.0
02/25/2011	56.9	13.4	72.2	53.1	55.6	62.7
02/24/2011	62.3	21.4	72.0	53.4	60.1	67.3
02/23/2011	58.6	6.3	72.1	44.0	58.0	67.7
02/22/2011	63.1	18.9	73.3	53.7	59.2	64.5
02/21/2011	59.8	20.4	73.7	51.2	58.7	67.9
02/20/2011	50.0	20.2	73.8	37.2	49.0	53.5
02/19/2011	49.1	21.5	74.0	43.0	48.1	53.9
02/18/2011	55.9	16.8	75.1	35.3	47.0	53.1
02/17/2011	39.4	25.9	73.8	37.1	47.1	58.2
02/16/2011	39.4	15.5	76.2	36.0	57.1	50.8
02/15/2011	30.3	22.4	79.1	50.1	47.0	49.6
02/14/2011	48.4	25.0	74.3	41.2	45.9	51.7
02/13/2011	53.1	18.7	76.2	38.1	47.0	45.1
02/12/2011	49.6	18.6	73.9	48.0	46.7	49.8
02/11/2011	52.8	25.8	73.9	43.2	47.3	54.6
02/10/2011	52.8	20.3	73.9	44.2	37.9	41.4
02/09/2011	52.5	14.9	74.6	42.4	45.6	47.0
02/08/2011	49.1	21.6	74.1	39.9	48.6	49.4
02/07/2011	42.7	21.1	73.9	39.3	44.6	46.4
02/06/2011	65.7	24.1	61.0	50.2	57.9	55.8
02/05/2011	64.0	16.1	59.1	50.8	58.3	58.9
02/04/2011	67.9	14.1	62.4	51.0	54.2	60.8
02/03/2011	62.4	22.3	59.2	58.1	59.7	57.3
02/02/2011	70.5	20.0	55.8	55.4	62.7	64.0
02/01/2011	61.3	19.6	56.2	66.5	62.1	62.6
01/31/2011	67.9	17.4	56.3	68.0	58.2	63.3
01/30/2011	68.2	22.2	56.2	67.1	60.3	62.4
01/29/2011	65.0	19.9	56.6	67.7	55.7	64.8
01/28/2011	67.3	18.9	56.3	65.3	55.1	61.4
01/27/2011	57.7	8.4	56.2	61.4	56.4	60.3
01/26/2011	64.1	6.6	56.5	59.3	56.4	57.3
01/25/2011	52.8	16.5	56.9	57.7	55.8	56.2
01/24/2011	68.5	18.1	56.4	62.3	57.4	62.6
01/23/2011	62.0	21.0	56.7	67.2	58.0	58.9
01/22/2011	60.5	24.5	56.8	67.2	55.9	61.5
01/21/2011	54.3	18.1	56.8	56.1	60.5	57.1
01/20/2011	50.7	19.7	58.3	58.5	57.8	62.1
01/19/2011	67.2	23.1	56.5	67.6	61.3	63.9
01/18/2011	67.5	20.3	56.7	61.4	55.1	63.6
01/17/2011	63.0	24.9	56.6	68.0	47.3	62.7
01/16/2011	64.2	22.0	57.0	64.9	54.9	61.8
01/15/2011	64.0	21.2	56.8	68.6	54.0	64.8
01/14/2011	64.5	12.8	56.5	64.0	52.3	58.7
01/13/2011	62.6	24.9	56.9	70.3	54.8	65.6
01/12/2011	63.7	24.0	56.6	65.2	55.0	58.7
01/11/2011	67.5	14.2	56.2	51.2	50.5	59.8
01/10/2011	67.9	22.2	56.2	70.2	47.9	58.9
01/09/2011	69.4	23.8	56.6	70.2	52.5	65.1
01/08/2011	64.9	15.7	56.9	55.7	53.6	61.7
01/07/2011	61.1	9.4	56.6	62.6	54.5	58.1
01/06/2011	64.0	32.0	56.8	46.5	65.0	59.4
01/05/2011	65.3	3.8	66.9	52.7	53.5	46.3
01/04/2011	68.6	8.0	59.2	59.2	53.2	46.7
01/03/2011	57.0	11.7	60.6	52.1	54.8	46.0
01/02/2011	69.0	18.0	56.4	67.9	52.5	49.3
01/01/2011	60.9	8.9	56.5	53.8	55.4	56.6
12/31/2010	68.9	11.2	56.5	53.7	56.0	54.2
12/30/2010	68.7	9.8	68.1	59.8	51.0	46.0
12/29/2010	62.3	10.7	56.6	60.2	54.9	60.1
12/28/2010	62.1	12.4	64.0	50.7	55.4	59.5
12/27/2010	61.6	6.2	63.2	51.7	59.7	59.2
12/26/2010	65.2	10.8	56.7	50.1	58.6	54.8
12/25/2010	57.9	11.6	57.0	52.7	59.4	54.3
12/24/2010	55.2	13.8	57.3	50.7	58.9	50.9
12/23/2010	62.0	14.9	56.9	66.9	55.8	56.8
12/22/2010	60.0	15.7	57.1	60.2	57.1	62.1
12/21/2010	65.6	19.7	56.6	67.2	57.2	51.1
12/20/2010	64.6	16.2	66.5	66.5	42.8	50.4
12/19/2010	62.1	12.9	56.9	69.7	42.0	58.0
12/18/2010	61.3	11.3	56.3	60.6	41.4	58.5
12/17/2010	69.6	6.1	64.8	62.0	37.6	50.1
12/16/2010	64.9	12.0	56.4	63.9	41.9	61.0
12/15/2010	67.7	32.3	69.8	71.5	11.3	29.6
12/14/2010	67.5	20.5	56.5	67.7	53.2	54.7
12/13/2010	69.4	10.1	56.8	55.0	46.3	53.8
12/12/2010	68.3	22.5	56.5	71.5	51.0	52.4
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Overall Search Quality