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Tactics Trainer Quirk


  • 2 years ago · Quote · #21

    Jpatrick

    When my Tactics Trainer rating was between 2000 and 2050, I was consistently getting paired with problems that were higher than my Tactics Trainer rating.  This isn't just some random bias.  It is skewed to where I was getting 90% or more problems that were higher rated than me. I have posted several blocks of Tactics Trainer history to demonstrate this.

    Now that my rating has slipped, the bias is now in the other direction.  In this block, you will find that 16 out of 25 problems are now LOWER in rating than my Tactics Trainer rating. This condition appears to be most likely when my rating is less than 1950 or so.  Maybe I can get more data.

  • 2 years ago · Quote · #22

    Jpatrick

    Has anyone else noticed this?

  • 2 years ago · Quote · #23

    gabrielconroy

    More interesting is how on earth you've managed to get to 2472 online rating when you're only ~1800-1900 in TT! Do you just spend hours on each move on online chess or something?

    Admittedly I don't tend to pay much attention in online chess, but my highest rating there is 2150 or something, while my highest TT is more like 2450. Strange differences. Perhaps we have different strengths.

  • 2 years ago · Quote · #24

    Jpatrick

    Below is another block of 25 problems.  Now that my rating is well under 1800, the bias in problem pairing has shifted completely.  Now I am getting problems that are much lower than my present TT rating, and we have a "gravity well" effect that is likely to pull me further down.  I've been here before.

  • 2 years ago · Quote · #25

    Jpatrick

    Recent Problems

     

    DateID#RatingMy RatingMovesAvg. TimeMy TimeOutcome
    May 1 8:18am 0064789 1620 1686 2/2 0:27 1:07 Passed (20% | -13)
    May 1 8:17am 0041671 1643 1699 1/1 0:31 1:02 Passed (20% | -13)
    May 1 8:16am 0166054 1623 1712 2/2 0:28 1:09 Passed (20% | -14)
    May 1 8:14am 0139387 1574 1726 1/1 0:33 0:53 Passed (53% | +1)
    May 1 8:13am 0058048 1609 1725 1/1 0:27 0:47 Passed (44% | -7)
    May 1 8:11am 0027384 1623 1732 1/1 0:20 0:15 Passed (85% | +7)
    May 1 8:10am 0146494 1630 1725 3/3 0:36 0:39 Passed (77% | +5)
    May 1 8:08am 0097903 1612 1720 1/1 0:18 0:16 Passed (82% | +6)
    May 1 6:54am 0000742 1612 1714 2/2 0:29 1:05 Passed (20% | -15)
    May 1 6:52am 0029389 1646 1729 3/3 0:49 1:44 Passed (20% | -14)
    May 1 6:46am 0044095 1609 1743 1/1 0:39 1:01 Passed (56% | +1)
    May 1 6:45am 0063272 1590 1742 3/3 0:53 0:56 Passed (78% | +3)
    May 1 6:41am 0032232 1628 1739 3/3 1:01 0:20 Passed (96% | +10)
    May 1 6:35am 0321309 1594 1729 1/2 1:36 4:49 Failed (10% | -18)
    May 1 6:29am 0409669 1622 1747 1/1 0:49 1:33 Passed (40% | -7)
    May 1 6:27am 0461225 1591 1754 3/3 0:28 0:10 Passed (95% | +8)
    May 1 5:10am 0188520 1641 1746 3/3 0:55 2:28 Passed (20% | -15)
    May 1 5:06am 0041532 1653 1761 2/2 1:50 8:27 Passed (20% | -15)
    May 1 4:58am 0041653 1651 1776 1/1 0:31 1:17 Passed (20% | -15)
    May 1 4:42am 0035474 1763 1791 2/2 1:19 3:35 Passed (20% | -11)
    May 1 4:24am 0000941 1738 1802 2/2 0:29 0:53 Passed (54% | +1)
    May 1 4:22am 0031076 1663 1801 3/3 1:11 1:51 Passed (56% | +1)
    May 1 4:07am 0039052 1773 1800 2/2 0:32 1:20 Passed (20% | -11)
    May 1 3:59am 0036542 1784 1811 1/1 0:31 2:16 Passed (20% | -11)
    May 1 3:56am 0035498 1789 1822 3/3 3:06 2:53 Passed (81% | +8)
  • 2 years ago · Quote · #26

    Jpatrick

    "Down here", I'm not getting any "rated retests".  You can see that 25/25 problems are rated lower than me.   Does everyone in this TT rating range see the same thing?

  • 2 years ago · Quote · #27

    Jpatrick

    Recent Problems

    DateID#RatingMy RatingMovesAvg. TimeMy TimeOutcome
    May 1 11:28am 0090626 1560 1693 3/3 0:44 0:59 Passed (66% | +1)
    May 1 11:27am 0031119 1592 1692 2/2 1:04 1:11 Passed (76% | +4)
    May 1 11:23am 0040457 1581 1688 2/2 0:55 0:51 Passed (81% | +5)
    May 1 11:11am 0048723 1609 1683 1/3 1:18 1:36 Failed (24% | -12)
    May 1 11:09am 0087124 1590 1695 3/3 0:46 0:25 Passed (89% | +8)
    May 1 11:08am 0092886 1574 1687 1/1 0:43 0:23 Passed (89% | +8)
    May 1 11:07am 0077205 1605 1679 1/1 0:27 1:30 Passed (20% | -13)
    May 1 11:04am 0037769 1838 1692 0/3 0:59 0:51 Failed (0% | -11)
    May 1 10:34am 0047664 1586 1703 2/3 2:37 0:17 Failed (67% | +1)
    May 1 9:39am 0082323 1610 1702 1/1 0:17 0:26 Passed (58% | +1)
    May 1 9:38am 0196687 1602 1701 1/1 0:25 0:21 Passed (83% | +6)
    May 1 9:27am 0318205 1590 1695 2/2 0:41 0:25 Passed (88% | +8)
    May 1 9:23am 0037482 1601 1687 2/2 1:12 2:09 Passed (41% | -7)
    May 1 9:18am 0131437 1623 1694 2/2 0:41 1:42 Passed (20% | -13)
    May 1 9:16am 0092802 1600 1707 1/1 0:24 0:15 Passed (88% | +7)
    May 1 9:15am 0025400 1596 1700 2/2 0:41 0:25 Passed (88% | +7)
    May 1 9:15am 0154364 1573 1693 3/3 0:38 0:05 Passed (100% | +11)
    May 1 9:14am 0026173 1574 1682 2/2 0:27 0:17 Passed (87% | +7)
    May 1 8:51am 0155781 1578 1675 2/2 0:37 0:21 Passed (89% | +8)
    May 1 8:50am 0022227 1572 1667 2/2 0:34 0:31 Passed (82% | +6)
    May 1 8:49am 0171984 1590 1661 1/1 0:16 0:20 Passed (70% | +4)
    May 1 8:47am 0040527 1574 1657 1/3 1:00 0:34 Failed (30% | -9)
    May 1 8:44am 0094510 1598 1666 1/1 0:19 0:09 Passed (91% | +10)
    May 1 8:43am 0082419 1645 1656 4/4 1:42 5:01 Passed (20% | -11)
    May 1 8:29am 0066782 1601 1667 0/1 0:25 0:32 Failed (0% | -19)
  • 2 years ago · Quote · #28

    Jpatrick

    Here is another block of 25 problems worth of Tactics Trainer history. 25/25 are rated lower than me.  Even with a pass rate of 90%, it's hard to gain rating points and maintain them.

  • 2 years ago · Quote · #29

    Jpatrick

    Recent Problems

     

    DateID#RatingMy RatingMovesAvg. TimeMy TimeOutcome
    May 3 5:39am 0080687 1546 1688 2/2 0:25 0:32 Passed (69% | +1)
    May 3 5:38am 0131515 1525 1687 4/4 0:51 0:14 Passed (98% | +9)
    May 3 5:38am 0036888 1533 1678 4/4 1:06 1:15 Passed (75% | +2)
    May 3 5:36am 0073802 1527 1676 3/3 0:41 0:53 Passed (68% | +1)
    May 3 5:12am 0151189 1506 1675 1/1 0:25 0:14 Passed (89% | +6)
    May 3 5:12am 0086317 1532 1669 2/2 0:22 0:11 Passed (90% | +7)
    May 3 5:11am 0048918 1555 1662 1/1 0:39 0:41 Passed (78% | +4)
    May 3 5:10am 0111720 1544 1658 2/2 0:33 0:20 Passed (88% | +7)
    May 3 5:10am 0023479 1538 1651 3/3 1:29 0:45 Passed (90% | +8)
    May 3 5:09am 0180608 1535 1643 3/3 0:42 0:36 Passed (83% | +6)
    May 3 5:01am 0022338 1567 1637 3/3 1:08 2:18 Passed (20% | -13)
    May 3 4:56am 0195667 1554 1650 4/4 1:18 1:58 Passed (59% | +1)
    May 3 4:46am 0030136 1527 1649 1/3 0:52 0:51 Failed (27% | -13)
    May 3 4:45am 0038369 1557 1662 2/2 0:28 0:22 Passed (84% | +6)
    May 3 4:43am 0041347 1544 1656 4/4 1:05 0:47 Passed (86% | +7)
    May 3 4:42am 0117379 1551 1649 2/2 0:52 0:26 Passed (90% | +9)
    May 3 4:38am 0038615 1579 1640 3/3 1:52 7:46 Passed (20% | -13)
    May 3 4:30am 0022342 1594 1653 2/2 0:29 1:05 Passed (20% | -13)
    May 3 4:18am 0116115 1562 1666 0/3 3:01 1:16 Failed (0% | -21)
    May 3 4:16am 0041252 1576 1687 3/3 0:57 1:06 Passed (74% | +2)
    May 3 4:15am 0022242 1526 1685 2/2 0:46 1:00 Passed (68% | +1)
    May 3 4:13am 0128232 1524 1684 2/2 0:49 0:10 Passed (100% | +9)
    May 3 4:11am 0077700 1554 1675 2/2 1:02 1:07 Passed (77% | +3)
    May 3 4:09am 0078622 1556 1672 4/4 1:05 0:34 Passed (90% | +8)
    May 3 4:08am 0088130 1579 1664 2/2 0:46 2:19 Passed (20% | -13)
  • 2 years ago · Quote · #30

    Jpatrick

    Here's another block where 25/25 problems are rated lower.  This "gravity well" effect is difficult to break.  I probably will eventually break it again, but it might take 200-300 problems to do it.

  • 2 years ago · Quote · #31

    Jpatrick

    Recent Problems

     

    DateID#RatingMy RatingMovesAvg. TimeMy TimeOutcome
    May 4 5:56am 0033039 1536 1642 3/3 1:04 0:55 Passed (83% | +6)
    May 4 5:53am 0036999 1526 1636 1/1 0:22 0:21 Passed (81% | +5)
    May 4 5:53am 0030461 1538 1631 2/2 1:58 0:54 Passed (91% | +9)
    May 4 5:52am 0030527 1533 1622 3/3 0:53 0:30 Passed (89% | +9)
    May 4 5:50am 0071670 1498 1613 3/3 0:47 0:19 Passed (93% | +9)
    May 4 5:24am 0041073 1531 1604 3/3 0:38 4:10 Passed (20% | -13)
    May 4 5:19am 0000816 1513 1617 3/3 1:34 0:25 Passed (98% | +11)
    May 4 5:19am 0026600 1543 1606 3/3 0:43 2:16 Passed (20% | -13)
    May 4 5:16am 0185561 1526 1619 2/2 1:01 1:31 Passed (60% | +1)
    May 4 5:14am 0042831 1545 1618 2/2 0:59 1:46 Passed (40% | -7)
    May 4 5:09am 0137362 1549 1625 1/3 1:01 1:01 Failed (27% | -11)
    May 4 5:07am 0172358 1528 1636 2/2 0:53 0:49 Passed (82% | +5)
    May 4 4:46am 0061644 1530 1631 0/2 0:56 0:14 Failed (0% | -21)
    May 4 4:45am 0021513 1546 1652 3/3 0:56 0:46 Passed (84% | +6)
    May 4 4:44am 0026352 1540 1646 2/2 0:37 0:31 Passed (83% | +6)
    May 4 4:38am 0107108 1581 1640 0/1 0:18 0:23 Failed (0% | -19)
    May 4 4:38am 0045544 1554 1659 4/4 0:54 0:19 Passed (95% | +10)
    May 4 4:37am 0037095 1560 1649 3/3 1:34 1:09 Passed (85% | +8)
    May 4 4:25am 0122747 1533 1641 2/2 0:44 0:27 Passed (88% | +7)
    May 4 4:24am 0107962 1534 1634 1/1 0:14 0:20 Passed (63% | +1)
    May 4 4:23am 0162317 1550 1633 4/4 1:48 1:10 Passed (87% | +9)
    May 4 4:22am 0036371 1519 1624 1/1 0:16 0:18 Passed (75% | +4)
    May 4 4:18am 0121098 1554 1620 1/1 0:34 1:54 Passed (20% | -13)
    May 4 4:14am 0118017 1577 1633 0/2 0:30 0:45 Failed (0% | -19)
    May 4 4:13am 0095074 1544 1652 1/1 0:16 0:14 Passed (83% | +6)
  • 2 years ago · Quote · #32

    Jpatrick

    Below is another block of problems.  With one exception where I somehow got paired with a problem rated in the 1900's, the rest of the problems are about 100 pts lower than me.   This has the effect of depressing my TT rating and keeping it down. So, 24/25 problems are rated lower.

    None of these problems were "rated retests.

  • 2 years ago · Quote · #33

    Jpatrick

    Recent Problems

     

    DateID#RatingMy RatingMovesAvg. TimeMy TimeOutcome
    May 5 11:25am 0076465 1529 1638 1/3 1:18 2:13 Failed (15% | -17)
    May 5 11:22am 0046825 1529 1655 2/2 1:08 0:29 Passed (92% | +9)
    May 5 5:31am 0167326 1485 1646 2/2 1:42 0:47 Passed (91% | +7)
    May 5 5:30am 0130343 1519 1639 4/4 0:45 0:26 Passed (88% | +8)
    May 5 5:29am 0056032 1491 1631 1/1 0:54 1:02 Passed (74% | +3)
    May 5 5:27am 0101037 1456 1628 2/2 0:51 0:39 Passed (85% | +7)
    May 5 5:23am 0092014 1486 1621 0/1 0:24 0:54 Failed (0% | -21)
    May 5 5:22am 0029158 1509 1642 1/1 1:14 0:14 Passed (100% | +11)
    May 5 5:20am 0083802 1537 1631 3/3 1:33 2:29 Passed (54% | +1)
    May 5 5:18am 0034027 1512 1630 3/3 0:53 1:11 Passed (66% | +1)
    May 5 5:15am 0094318 1577 1629 0/2 0:39 0:28 Failed (0% | -21)
    May 5 5:15am 0177719 1503 1650 3/3 1:10 0:27 Passed (94% | +10)
    May 5 5:14am 0027327 1507 1640 1/1 0:26 1:19 Passed (20% | -15)
    May 5 5:10am 0112602 1512 1655 4/4 1:01 0:55 Passed (82% | +5)
    May 5 4:43am 0147786 1496 1650 1/1 0:14 1:11 Passed (20% | -15)
    May 5 4:41am 0177086 1491 1665 3/3 0:43 0:31 Passed (86% | +5)
    May 5 4:31am 0151086 1496 1660 2/2 0:45 0:30 Passed (87% | +6)
    May 5 4:27am 0047385 1523 1654 2/2 0:31 0:19 Passed (88% | +7)
    May 5 4:25am 0153099 1591 1647 2/2 0:40 0:37 Passed (82% | +6)
    May 5 4:24am 0035688 1501 1641 2/2 0:57 0:31 Passed (89% | +9)
    May 5 4:22am 0063850 1572 1632 3/3 1:07 5:18 Passed (20% | -13)
    May 5 4:16am 0029011 1479 1645 1/1 0:18 0:11 Passed (88% | +7)
    May 5 4:15am 0039145 1537 1638 1/1 0:44 1:03 Passed (63% | +1)
    May 5 4:10am 0141144 1519 1637 0/2 0:30 0:33 Failed (0% | -21)
    May 5 4:08am 0290517 1915 1658 2/2 1:00 1:27 Passed (58% | +1)
  • 2 years ago · Quote · #34

    Jpatrick

    Recent Problems

     

    DateID#RatingMy RatingMovesAvg. TimeMy TimeOutcome
    May 6 5:23am 0048913 1537 1647 1/1 0:28 0:59 Passed (20% | -15)
    May 6 5:20am 0032143 1546 1662 2/2 0:34 1:41 Passed (20% | -15)
    May 6 5:18am 0026602 1523 1677 4/4 1:34 1:10 Passed (85% | +5)
    May 6 5:15am 0039507 1525 1672 5/5 1:48 0:30 Passed (97% | +9)
    May 6 5:14am 0154082 1507 1663 1/1 0:37 0:38 Passed (79% | +3)
    May 6 5:13am 0063682 1495 1660 2/2 1:07 0:10 Passed (100% | +9)
    May 6 5:13am 0048170 1517 1651 2/2 0:37 0:44 Passed (72% | +1)
    May 6 5:12am 0022149 1541 1650 3/3 0:44 0:41 Passed (81% | +5)
    May 6 5:06am 0144601 1551 1645 2/2 1:06 1:13 Passed (76% | +4)
    May 6 5:05am 0089666 1551 1641 1/1 0:35 0:57 Passed (48% | -5)
    May 6 5:02am 0079742 1530 1646 0/1 0:17 0:18 Failed (0% | -21)
    May 6 5:01am 0022370 1545 1667 3/3 0:43 1:10 Passed (51% | +1)
    May 6 4:53am 0065355 1533 1666 2/2 0:52 0:49 Passed (81% | +4)
    May 6 4:52am 0257035 1552 1662 1/1 0:49 1:12 Passed (61% | +1)
    May 6 4:47am 0040531 1564 1661 1/1 0:21 0:49 Passed (20% | -14)
    May 6 4:44am 0022002 1517 1675 2/2 0:40 0:33 Passed (84% | +4)
    May 6 4:44am 0057654 1545 1671 2/2 0:27 0:21 Passed (84% | +6)
    May 6 4:43am 0145730 1525 1665 1/1 0:24 0:14 Passed (88% | +6)
    May 6 4:42am 0106563 1506 1659 3/3 0:50 0:48 Passed (81% | +3)
    May 6 4:40am 0101561 1553 1656 3/3 0:38 1:18 Passed (20% | -14)
    May 6 4:38am 0034837 1524 1670 2/2 0:38 0:27 Passed (86% | +5)
    May 6 4:28am 0090015 1567 1665 2/2 0:30 0:20 Passed (87% | +8)
    May 6 4:25am 0089799 1563 1657 3/3 0:49 0:39 Passed (84% | +7)
    May 6 4:25am 0194063 1561 1650 2/2 1:02 1:02 Passed (80% | +6)
    May 6 4:22am 0051142 1553 1644 1/1 0:23 0:21 Passed (82% | +6
  • 2 years ago · Quote · #35

    Jpatrick

    Well, I've seen enough.  The Tactics Trainer criteria for pairing me with problems is biased, and I've got no idea why.  If my rating is 2000+, it's biased to give me higher rated problems; If my rating is <1700, it's biased to give me lower rated problems.

    If my rating is something like 1800+, I am regularly awarded "rated retests" of problems that I fail. If my rating is lower I do not get rated retests.

    In light of all that, I reset my rating and training history. Here's what happened with the first 25 problems.

  • 2 years ago · Quote · #36

    Jpatrick

    Recent Problems

     

    DateID#RatingMy RatingMovesAvg. TimeMy TimeOutcome
    May 6 12:32pm 0020557 1706 1727 2/2 0:28 0:20 Passed (86% | +13)
    May 6 12:30pm 0078392 1734 1714 4/4 1:08 1:36 Passed (64% | +7)
    May 6 12:28pm 0026211 1702 1707 2/2 0:25 0:24 Passed (81% | +13)
    May 6 12:27pm 0036501 1645 1694 3/3 0:47 0:28 Passed (88% | +14)
    May 6 12:26pm 0036080 1636 1680 2/2 0:51 0:55 Passed (77% | +9)
    May 6 12:23pm 0020790 1705 1671 0/3 0:58 2:32 Failed (0% | -21)
    May 6 12:20pm 0088202 1711 1692 2/2 0:37 0:35 Passed (81% | +16)
    May 6 12:19pm 0118721 1670 1676 2/2 1:03 1:01 Passed (81% | +15)
    May 6 12:18pm 0022857 1685 1661 1/1 0:46 1:41 Passed (20% | -15)
    May 6 12:13pm 0109011 1706 1676 0/2 0:48 0:51 Failed (0% | -25)
    May 6 12:11pm 0021814 1695 1701 3/3 0:57 1:52 Passed (27% | -14)
    May 6 12:09pm 0041816 1666 1715 3/3 1:06 0:18 Passed (98% | +24)
    May 6 12:08pm 0166544 1679 1691 1/1 0:18 0:54 Passed (20% | -20)
    May 6 12:06pm 0036434 1668 1711 2/2 0:33 0:19 Passed (88% | +22)
    May 6 9:30am 0058902 1631 1689 3/3 1:28 0:48 Passed (89% | +21)
    May 6 9:29am 0021850 1639 1668 1/1 0:26 0:25 Passed (81% | +18)
    May 6 9:28am 0031092 1586 1650 2/2 0:46 0:37 Passed (84% | +22)
    May 6 9:27am 0092356 1645 1628 2/2 0:36 0:47 Passed (68% | +19)
    May 6 9:26am 0026129 1573 1609 4/4 0:48 0:21 Passed (92% | +42)
    May 6 9:25am 0137739 1499 1567 2/2 0:32 0:28 Passed (83% | +34)
    May 6 9:23am 0032531 1493 1533 2/2 1:18 0:53 Passed (86% | +47)
    May 6 9:22am 0024405 1418 1486 3/3 0:57 0:28 Passed (90% | +56)
    May 6 9:21am 0053381 1351 1430 1/1 0:28 0:29 Passed (79% | +48)
    May 6 9:19am 0037235 1331 1382 1/1 0:23 0:30 Passed (68% | +33)
    May 6 9:18am 0160907 1234 1349 2/2 0:46 0:29 Passed (87% | +149)
  • 2 years ago · Quote · #37

    beardogjones

    OMG! The programming has a logic error!

  • 11 months ago · Quote · #38

    RobbieCoull

    If you look at the distribution of tactics ratings it has huge peaks and troughs with a tiny proportion at the high rating end. This is likely resulting in a pull towards the peaks of lower rated problems.


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