BT2450

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The BT2450 is a test that can be used to determine the skill level of chess computers and chess programs in the computer chess area . The test was developed at the beginning of the 1990s by the engineers Hubert Bednorz and Freddy Tönissen, from whose name the abbreviation "BT" is derived. The test consists of 30 chess positions from the different phases of a game of chess . The Bratko-Kopec test can be regarded as a forerunner from the 1980s .

execution

To carry out the BT2450 test, the time is measured which a chess computer or a chess program needs to find the solution move in each of the 30 positions. If the solution is not found within 15 minutes (900 seconds) per position, a time of 900 seconds is included in the test result for the corresponding position. This also applies if a program finds the solution move within 15 minutes, but rejects it in the further course of the position evaluation in favor of another supposedly better move. If a program first determines the solution, then another and later the correct solution again, the time until the solution is finally found applies.

The test result is calculated from the total time to solve all 30 positions according to the formula BT = 2,450 - 2 x total time (time in minutes) or BT = 2,450 - total time / 30 (time in seconds). The determined value is comparable to the internationally valid Elo values ​​to a limited extent . It should be noted, however, that the BT2450 test only evaluates the tactical abilities of a program. The value that can be achieved with the BT2450 is between 1,550 and 2,450. For values ​​below 1,650 or above 2,300, however, the test is considered to be too imprecise.

A revised version of the test is called the BT2630 . This differs from the BT2450 test in that it has a higher base value of 2,630 in the formula and in seven other positions. It was developed about two years later to allow a better assessment of the increased playing strength of good chess programs. The original BT2450 is now only used for chess programs on microcomputers such as PDAs .

Another further development is the BS2830 test developed by Hubert Bednorz and Heinz-Josef Schumacher, which consists of 27 items and according to the formula BS = 2,830 - total time / 1.5 - (total time x total time) / (22 * 22) (time in minutes). In 1998, this formula replaced the formula originally proposed by the two developers of the test, BS = 2,830 - (total time x total time) / (17 * 17).

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