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  1. #1
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    Chess Tactics (for IOS)

    There's an app for IOS called Chess Tactics - Free Strategy Trainer by Lockwood Productions.

    Basically, the app lets you create tactics for other people to solve, and you solve other people's tactics.

    Each tactic gets a rating, and you get a rating too. If you solve a tactic then your rating goes up and the tactic's rating goes down.
    Next you get paired with a different tactic of your rating level.

    Here is one that I posted, it is rated 2642 as of 16/9/16

    White to draw.png

    White to move and draw

  2. #2
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    Quote Originally Posted by Igor_Bjelobrk View Post
    There's an app for IOS called Chess Tactics - Free Strategy Trainer by Lockwood Productions.

    Basically, the app lets you create tactics for other people to solve, and you solve other people's tactics.

    Each tactic gets a rating, and you get a rating too. If you solve a tactic then your rating goes up and the tactic's rating goes down.
    Next you get paired with a different tactic of your rating level.

    Here is one that I posted, it is rated 2642 as of 16/9/16

    White to draw.png

    White to move and draw
    This looks like an endgame rather than a tactic.
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  3. #3
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    This position arose in one of my blitz games, which I lost. In the game, I swapped the g-pawn for the f-pawn but couldn't stop the b-pawn from queening.

    Afterwards, when I analysed with an engine, it showed that the only way to draw is to play Bc6! and immediately sacrifice that bishop for the b-pawn.

    for example 1.Bc6 Kc5 2.Bxb5 Kxb5 3.Kg5 Bc4 4.Kf6 Kc6 5.g5 Kd7 6.g6 fxg6 7.Kxg6 =

  4. #4
    CC FIDE Master Jesper Norgaard's Avatar
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    Quote Originally Posted by Igor_Bjelobrk View Post
    This position arose in one of my blitz games, which I lost. In the game, I swapped the g-pawn for the f-pawn but couldn't stop the b-pawn from queening.

    Afterwards, when I analysed with an engine, it showed that the only way to draw is to play Bc6! and immediately sacrifice that bishop for the b-pawn.

    for example 1.Bc6 Kc5 2.Bxb5 Kxb5 3.Kg5 Bc4 4.Kf6 Kc6 5.g5 Kd7 6.g6 fxg6 7.Kxg6 =
    I commend you for the example, a very nice "study" occurred from your game. However I don't agree with the sentence "the only way to draw is to play Bc6! and immediately sacrifice that bishop for the b-pawn". The above line with 1...Kc5 leads to a draw as described. That doesn't mean White must sacrifice his bishop on the b-pawn very soon. It depends. We can actually put the the question to the test with

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    Last edited by Jesper Norgaard; 18-09-2016 at 01:59 AM.
    Chess well played is imagination, calculation, observation, experience and memorization in order of importance.

  5. #5
    CC FIDE Master Jesper Norgaard's Avatar
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    Quote Originally Posted by MichaelBaron View Post
    This looks like an endgame rather than a tactic.
    An endgame *is* a tactic if there is only one move that saves a draw. An instructive tactic in this case.
    Chess well played is imagination, calculation, observation, experience and memorization in order of importance.

  6. #6
    CC Grandmaster Garrett's Avatar
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    I use the Lockwood app to do a few tactics throughout the day.

    Just had a 15 move Lucena sequence, so there's a few endgames in there.

  7. #7
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    Your line looks good Jesper.
    White has to play 1.Bc6 and if black spends time to get his B to g6, then white has time to play Be8 and Kf6 and win the f7 pawn.

  8. #8
    CC FIDE Master Jesper Norgaard's Avatar
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    Quote Originally Posted by Igor_Bjelobrk View Post
    Your line looks good Jesper.
    White has to play 1.Bc6 and if black spends time to get his B to g6, then white has time to play Be8 and Kf6 and win the f7 pawn.
    Quite an impressive study! I started out with 1.Bd3 which is no good because of 1...Bc4. Having the study reach 2642 means most solvers fail trying, is that right? What is the rating record for a "tactic" (a problem position) in this database?
    Chess well played is imagination, calculation, observation, experience and memorization in order of importance.

  9. #9
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    The highest rated tactic in the chess tactics app is rated 3273.
    Its a mate in 8 in a complicated middle-game.

    I've got 9 tactics in there, and the bishop endgame is the highest rated of those.

  10. #10
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    Quote Originally Posted by Jesper Norgaard View Post
    An endgame *is* a tactic if there is only one move that saves a draw. An instructive tactic in this case.
    Really? White has Q on b2 and K on b1. Black has K on g8 and pawn on h2. Black plays the only move that saves the draw 1....h1=Q+. Is that a tactic?
    Still searching for Bobby Fischer....
    and fighting against those humourless bureaucrats who are forever lost in the minutiae.

  11. #11
    CC FIDE Master Jesper Norgaard's Avatar
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    Quote Originally Posted by jammo View Post
    Really? White has Q on b2 and K on b1. Black has K on g8 and pawn on h2. Black plays the only move that saves the draw 1....h1=Q+. Is that a tactic?
    No you're right, that doesn't "work" as a tactic, since the solution is as plain as daylight. To become a worthwhile challenge, some sensible alternative moves must exist, before we can call it a tactic. This is still not enough, which the following position should demonstrate:

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    It is quite trivial to find the solution, and it doesn't feel like a tactic.

    I think it is not a tactic if it can't obtain more than 1000 in rating. However that is the most dissatisfying definition under the sun. Perhaps I should give up on trying to define a tactic, and be content with my "feel" of what a tactic is. No chess game has ever been won by defining chess terms, only by finding good chess moves.

    Here is a problem by Edward Lasker that many strong players recognize as quite difficult, but which has no tactic at all, just maneuvering:

    White to move and win

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    Chess well played is imagination, calculation, observation, experience and memorization in order of importance.

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