I built a tool for training endgames. What do you think?

You just copied the whole site from mortalchess.com you didn't even change the favicon.

Maybe hes the author of both websites?

Why would he host both and give different emails?

@SelfmateMan awesome list, thanks man! Those were mostly new ideas for me - i had a lot of trouble with this triangulation one

blitztactics.com/position?goal=win&fen=2k5/8/p1P5/P2K4/8/8/8/8%20w%20-%20-%200%201
White wins (another triangulation example - more than one solution)

Links to a few others for convenience:

blitztactics.com/position?goal=win&fen=6k1/8/3K2p1/8/6P1/8/8/8%20w%20-%20-%200%201
White wins (the Zig Zag manoevre)

blitztactics.com/position?goal=win&fen=2K5/k7/7p/8/8/8/6P1/8%20w%20-%20-%200%201
White wins (the queen of bodycheck studies, very difficult)

blitztactics.com/position?goal=win&fen=8/p4K2/P7/8/8/8/1k6/8%20w%20-%20-%200%201&depth=15
White wins (the bodycheck method)

blitztactics.com/position?goal=win&fen=8/3p4/8/2P5/P3k3/8/8/7K%20w%20-%20-%200%201&depth=15
White wins (Square rule: block the route of the black king with a pawn sac)

blitztactics.com/position?goal=win&fen=K7/8/p7/8/8/2k5/P7/8%20w%20-%20-%200%201
White draws (another example of the reti motif)

blitztactics.com/position?goal=win&fen=6K1/8/6k1/8/8/p7/P7/8%20w%20-%20-%200%201
White draws (unusual King move)

@thiagoloio i'm actually the original author. the code is open source here and free to use: github.com/linrock/blitz-tactics

i didn't know about this other site, but cool idea with the slowly-draining combo bar as an urgency game mechanic

@SelfmateMan also, thanks for the suggestion on preventing 3-fold-repetition. i'll see about getting more variance in the computer moves

@flamehead #14

Welcome :-)

However, i note that it often does not play the right move. For example

blitztactics.com/position?goal=win&fen=6K1/8/6k1/8/8/p7/P7/8%20w%20-%20-%200%201

after 1.Kf8? (only 1.Kh8 draws) Kf6 2.Kg8 it plays 2...Ke6? which is draw and not 2...Ke5 which is the only way to win. So its usefulness is a bit restricted.

According to the endgame tablebases, the Vancura position is a loss for black in 37 moves:

blitztactics.com/position?goal=draw&fen=R7/6k1/P4r2/1K6/8/8/8/8%20b%20-%20-&depth=11

Did anyone besides me actually check any of these positions against an endgame tablebase?

@WilliamShakespeare only a loss in 37 if you flip the board ;-)

to be correct, dont flip the pieces, just flip the board.

Then you will see that its draw. Its magic! :-)