1. Joined
    18 Jan '06
    Moves
    3054
    20 Jul '06 22:161 edit
    Originally posted by aginis
    thanks, i'm honored.

    1.Qc8 threatens Bd7+
    1...Kg8 forced
    2.Bc7!! a neat little move whose consequences we will see.
    2...QxQ forced again.
    3.Be5 threatening a discover mate if the king moves and threatens to queen the f pawn with mate if the black queen doesn't guard the square.
    3...Qc5! guards f8 and attacks the bishop on e5 (capture with check would to the next).

    for more info look here
    http://en.wikipedia.org/wiki/Null-move_heuristic
    Nice, nice, very good indeed.

    How long did it take you to work through all the variations?
  2. Standard memberBigDogg
    Secret RHP coder
    on the payroll
    Joined
    26 Nov '04
    Moves
    155080
    20 Jul '06 22:42
    Originally posted by aginis
    thanks, i'm honored.

    1.Qc8 threatens Bd7+
    1...Kg8 forced
    2.Bc7!! a neat little move whose consequences we will see.
    2...QxQ forced again.
    3.Be5 threatening a discover mate if the king moves and threatens to queen the f pawn with mate if the black queen doesn't guard the square.
    3...Qc5! guards f8 and attacks the bishop on e5 (capture with check would ...[text shortened]... to the next).

    for more info look here
    http://en.wikipedia.org/wiki/Null-move_heuristic
    You left out the moves 3.gxf7+ Kh8 and now only 4.Be5!

    Other than that, good explanation and congratulations for solving such a difficult problem.
  3. Joined
    11 Jun '06
    Moves
    3516
    20 Jul '06 22:42
    Originally posted by LanndonKane
    Nice, nice, very good indeed.

    How long did it take you to work through all the variations?
    5-10 min i was looking at a lot of other stuff too. and before you gave the hint i was sure Qc5 was the first move.
  4. Joined
    11 Jun '06
    Moves
    3516
    20 Jul '06 22:433 edits
    Originally posted by BigDoggProblem
    You left out the moves 3.gxf7+ Kh8 and now only 4.Be5!

    Other than that, good explanation and congratulations for solving such a difficult problem.
    hehe woops thats what i meant sorry 😳
    i was wondering why i was a move short. here's the corrected version.

    1.Qc8 Kg8 2.Bc7!! Qxc8 3. gxf7+ Kh8 (kf8 Bd6 # ) 4.Be5 Qc5! 5.Bb2!! Nc7 6.Ba1 a4 7.Bb2 a3 8.Bb1 8...a2 9.Bb2 a1=q 10.Bxa1 Nb5 11.Ke6+ Nc3 12.Bxc3+ Qxc3 13.f8=q #

    i fixed the other one too.
  5. Joined
    18 Jan '06
    Moves
    3054
    20 Jul '06 22:58
    Originally posted by aginis
    5-10 min i was looking at a lot of other stuff too. and before you gave the hint i was sure Qc5 was the first move.
    Geez, it would have taken me the better part of an hour to do all that 😕
  6. Joined
    06 Jul '06
    Moves
    1391
    20 Jul '06 23:01
    Originally posted by LanndonKane
    Geez, it would have taken me the better part of an hour to do all that 😕
    It would have taken me my entire life to find such a line LOL!
    Truely awesome 🙂
  7. Joined
    21 Feb '06
    Moves
    6500
    20 Jul '06 23:02
    haha, I had a similair Idea, but I spent a lot more time looking at Gxh7+ Kh8 (kxh7 is mate in 2) and then playing Be2.....If only i looked at Bc7 Propably would of got it then.
  8. Joined
    21 Feb '06
    Moves
    6500
    20 Jul '06 23:151 edit
    "Futility pruning: This is an aggressive method of narrowing down the search. It allows the program to go much deeper, but it also increases the possibility that it will oversee something."


    Ok - Did any of you turn this function off and then use fritz?


    oh, and: -

    "Selectivity: Fritz uses a search technique that is highly "selective". This means that instead of looking at every single line of play, however stupid, it tries to narrow things down to meaningful variations. This allows it to go much deeper, but it can occasionally miss a highly unusual continuation. This is the case in positions involving "zugzwang" (i.e., positions in which one side faces disaster because he is forced to make a move). This can be corrected by reducing the selectivity value – when solving studies you may want to set it to zero, since here zugzwang is very often involved. However, remember to set it back to a higher value for normal games. Otherwise, the search depth will be decreased, and the program will not be as strong."


    now see if fritz gets it or not...
  9. Joined
    18 Jan '06
    Moves
    3054
    21 Jul '06 02:45
    Originally posted by Shinidoki
    "Futility pruning: This is an aggressive method of narrowing down the search. It allows the program to go much deeper, but it also increases the possibility that it will oversee something."


    Ok - Did any of you turn this function off and then use fritz?


    oh, and: -

    "Selectivity: Fritz uses a search technique that is highly "selective". This mea ...[text shortened]... creased, and the program will not be as strong."


    now see if fritz gets it or not...
    Is there a way to undo learning, because fritz has already learned the position and gets it everytime now.
  10. Joined
    21 Feb '06
    Moves
    6500
    21 Jul '06 05:45
    Originally posted by LanndonKane
    Is there a way to undo learning, because fritz has already learned the position and gets it everytime now.
    look in the help - online or in the program....I should imagine there is a reset
  11. Joined
    11 Jul '06
    Moves
    3197
    22 Jul '06 21:191 edit
    I think it is flawed.
    Bc7 is a blunder, and the position is realistically drawn if played correctly.
    After 3. ... Hh8 4.Be5 Qc5! 5.Bb2?? loses to a3 6.Ba1 Nc7 and you cannot move the king anywhere. 7. Be5 Qxe5+ 8. Kxe5 Kg7 and white is dead.
  12. Joined
    21 Jul '06
    Moves
    0
    22 Jul '06 21:54
    Originally posted by Xpofer
    I think it is flawed.
    Bc7 is a blunder, and the position is realistically drawn if played correctly.
    After 3. ... Hh8 4.Be5 Qc5! 5.Bb2?? loses to a3 6.Ba1 Nc7 and you cannot move the king anywhere. 7. Be5 Qxe5+ 8. Kxe5 Kg7 and white is dead.
    What is this new piece, H?

    When did the pawn on a5 move to a4, allowing 5...a3?
  13. Standard memberBowmann
    Non-Subscriber
    RHP IQ
    Joined
    17 Mar '05
    Moves
    1345
    22 Jul '06 22:40
    Originally posted by ThudanBlunder
    What is this new piece, H?

    When did the pawn on a5 move to a4, allowing 5...a3?
    User 65548


    Any relation?
  14. Joined
    11 Jul '06
    Moves
    3197
    22 Jul '06 22:41
    Wooops.

    ok here.

    1.Qc8 Kg8 2.Bc7?? Qxc8 3. gxf7+ Kh8 4.Be5 Qc5! 5.Bb2?? Nc7 6.Ba1 *a4* 7.Bb2 *a3* 8.Bb1 This move is imposible 8 Be5 Qxe5 9. Kxe5 Kg7 or
    5. Kf5 Qxe5 6. Kxe5 Kg7 7. Ke6 Kf8 abd black is winning
  15. Joined
    06 Jul '06
    Moves
    1391
    22 Jul '06 23:01
    Originally posted by Xpofer
    Wooops.

    ok here.

    1.Qc8 Kg8 2.Bc7?? Qxc8 3. gxf7+ Kh8 4.Be5 Qc5! 5.Bb2?? Nc7 6.Ba1 *a4* 7.Bb2 *a3* 8.Bb1 This move is imposible 8 Be5 Qxe5 9. Kxe5 Kg7 or
    5. Kf5 Qxe5 6. Kxe5 Kg7 7. Ke6 Kf8 abd black is winning
    8.Bb1 is indeed impossible.
    8.Ba1 still looks nice though 😉
Back to Top

Cookies help us deliver our Services. By using our Services or clicking I agree, you agree to our use of cookies. Learn More.I Agree