No chess thread?

>>8883188
c7d5

>>8883188
Queen to g4?

lichess.org/UBvJoytL

>>8883200
>>8883208
Both wrong. Be warned. This is an extremely hard puzzle. It was composed by T. Taverner in 1881.

I should probably clarify: it's a mate in 2.

>>8883188
lol
Nxe8

if not take e3 mate without salvation

if take Qf5

File: image.jpg (715KB, 1500x998px) Image search: [Google]

715KB, 1500x998px

E2e3

Or either of the 2 moves mentioned above

>>8883188
Pawn to E3.

>>8883246
>>8883239
not a mate in 2, Rxe3

solution imo here>>8883229

>>8883213
What a shitshow

>>8883188
Was dead sure on Nxe8 and had to look it up. Fucking hell that was sneaky.

>>8883256
>that was sneaky
scrub i didn't have to look it up

endgame puzzles are the hardest this isn't hard

>>8883229
Only one move leads to mate in 2

>>8883262
So it's not Nxe8? How can Black prevent mate in 2?

>>8883265
1...Bg5

>>8883267
>1...Bg5
and then e3 mate tard

2 moves

>>8883269
Ke5

>>8883188
>>>/tg/

Every fucking time.

>>8883272
Nobody on /tg/ plays chess, they're too busy pretending to be fucking unicorns

>>8883271
ayy ))

How do you make a game on lichess? Someone link?

>>8883283
click on play w a friend

copy link, post

>>8883188
Bf2?

https://lichess.org/AbUrUfcD

>play sicilian
>lose pawn
>resign

btfo

>>8883291
Nope Bg5 again

https://lichess.org/uIA4EBfw

https://lichess.org/r5whT1yD

Knight to d5
bishop has to take it
then mate with the rook

>>8883324
Mate with the rook how? Bd8 is still there.

>>8883188
Rh1

>>8883333
checked

>>8883328
ayyy m8 Ur right

>>8883341
fuck no

OP what is the answer

>>8883346
>>8883341
holy shit it is rh1

and black can't make a useful move

>>8883188
[spoiler]e2e3[/spoiler] no engine

https://lichess.org/gdYtShA9

>>8883188
Horse C7 -> D5

>>8883360
>Horse
It's rh1

>>8883333#
Am retarded, c7 to e6

i am a brainlet in chess and dont even know what op is asking, but if he wants the white to move and win doesnt h2 to h4 do it?

ggwp

ez

>>8883362
holy fuck mind fucking blown
>>8883383
no

holly fuck
how can you guys be so fucking stupid?
this shit is already a fucking mate for white

>>8883413
solve it then, I couldnt without seeing it

>>8883341
>>8883350
>>8883362
Correct its Rh1. Every single reply from black leads to mate on the next move.

>>8883383
The bishop would take the rook

What about this?

1. h7->f5
2. Then h5->f5 if black takes with rook, h5->g4 otherwise.

>>8883446
1st case is not a mate

>>8883425
What about if black responds with c4->c3? I'm not seeing what white is supposed to do in that situation.

>>8883446
there are other replies for black, simulate all of them before playing

>>8883425
>Rh1
Wha... how?

>>8883449
Yeah, saw that after I posted it. Stupid me.

>>8883450
Oh nevermind, saw it now. This puzzle was stupidly difficult. I mean, it's good, but I don't really like it when the answer is "oh you have to look at every single reply black can make", I much prefer the ones that force black into a single move.

>>8883425
What's the difference to rh3, re1 or rd1

>>8883462
>I prefer easy stuff
chess is complicated. choke and wait a bit is as valid a technique as every other. you ALWAYS have to look at every single reply your opponent can make, no matter what you're doing, unless you know the position (as in, you already know all good replies)

>>8883465
Rh1 lets the queen go to h2 in case black plays Bg5

>>8883465
that you free up bishop to play h2 if needed (e.g against re3)

>>8883468
this

>>8883462
Yeah it's notoriously hard. It's over a century old and frequently called the hardest chess puzzle in existence. That's obviously debatable but you're not alone.

Okay another one: white to move and mate in 24. Find the mate.

Despite being longer I actually think this one is easier than the first one

>>8883505
i think it's moving the white square bishop back and forth until you take the 4 pawns at file h

then black will have to move one of the two knights leading to a mate

>>8883505
move the priest around on that one lane and eat the horse at the 24th move to deliver mate. all force moves

File: very_long_puzzle.jpg (90KB, 945x946px) Image search: [Google]

90KB, 945x946px

>>8883505
Fuck I fucked it up. Wrong position. This is the correct one.

>>8883534
this is stupid

>>8883188
Qh6+
if Bg5 then Qd6+ Re5 e3#
if Ke5 then Rh5+ Bg5 Rxg5+ Rf5 Rxf5#

It's already checkmate

Yall so bad at chess lmao

>>8883188
Queen c5

File: Screenshot_20170504-193941.jpg (201KB, 715x713px) Image search: [Google]

201KB, 715x713px

>>8883188

I love chess. I play bullet chess daily. But if I get banned for a thread about the life of people in science, why the fuck is this thread allowed? It has nothing to do with science OR math.

This thread is more /tg/ than anything.

Also all the best chess players in my university are liberal arts students. The first guy from the math and science faculty is 20th. The first guy is a legit GM.

>>8883855
your thread shouldn't have been banned either

chess is quite exceptional and not some dumb bullshit like poker or whatever

besides we have a billion iq threads/day, those are just shitposts, might as well have a real thread

What is black's response to Bishop G8, threatening check mate with knight, D5.

I can only see rook, E5, but then Queen G4 is checkmate so there must be another reply but I cannot see it.

>>8883907

never mind. I'm retarded.

File: Quotation-Anatoly-Karpov-Chess-is-everything-art-science-and-sport-60-6-0632.jpg (32KB, 640x360px) Image search: [Google]

32KB, 640x360px

>>8883855
Chess is science tho

OMFG.

Actually it's not as crazy as you might think. I verified my solution so I know it's right.

I think OP messed up by saying it was super hard and you won't find the first move. It's actually a pretty logical first move.

>>8883855
>>8883862
Chess threads don't even get deleted from /fit/, it would be a joke to delete them here then

>>8883188
>mate in 2
>>8883534
>mate in 24
well that escalated quickly!

>>8883534
looks like a zugzwang problem: just shuffle until black has to move a knight, then move bishop to c6 or c2 to mate.

I just wrote a tsume-shogi solver using proof-number search. So far it can solve up to mate-in-29 problems. Maybe I'll adapt it for chess problems.

>>8884064
nice bro, 29 moves is pretty deep

i've only ever written an anti chess (game where you have to lose all your pieces to win, it has some other rules too) program in C (which doesn't have the en passant rule lulz, but that doesn't change the game very much

it's playable, but the problem is that writing a chess engine is actually "easier" since all you realistically have to worry about is how many pieces pawns you have (basically the static evaluation function) - this is also why chess engines aren't very good at endgames as they are in the earlier stages of the game

in antichess you can have only 1 or 2 pieces and still be in a losing position and it's hard to define positional rules

if you know what i mean, still it was just a programming exercise for me to learn alpha-beta search

anyways is proof-number search easier to implement than alpha-beta?
>>8883948
solution is Rh1, already solved

>>8884086
yeah it is as easy as alpha-beta, but PN-search isn't as flexible. It requires a yes/no evaluation function. But that is perfect for mate problems: are you checkmated or not. It is breadth-first, so it is memory intensive compared to depth-first searches like alpha-beta. But one nice thing is it gives you the entire proof-tree of the solution in the end, with all branches and refutations.

https://lichess.org/PsuEtc9j

File: victory.png (126KB, 365x408px) Image search: [Google]

126KB, 365x408px

>>8884146

https://lichess.org/Rf0IdwSO

https://es.lichess.org/AA9SEvhg

>>8883188
Rook to e1 then pawn to e3, shouldn't matter whatever move black makes I think

Op can you explain why f1 to e1 or d1 doesn't work? I don't see it.

>>8884245
How can you possibly think that would work?? Forget explaining why that wouldn't work, explain why you think it would!

>>8884264
well i tried all check moves and they don't work so i tried forcing opponent to move. knight moves don't go anywhere and neither do pawns or the king. so its gotta be one of the rooks or bishops but i want bishops to stay where they are. what the fuck is this rook at g1 doing for me

>>8884278
>"white to move and win"
So this....
Is the power....
Of brainlet reading comprehension.........

>>8884281
which does mean I'm white and it's my move correct?

>>8884295
OP forgot to note right away that it is a mate in two problem. Mates in three moves are not good enough, so: Rf1-e1 (and many other moves) fail to Bd8-g5, blocking the queen protection of d5 and delaying checkmate by a move.

>>8883188
No mate in ones are possible, but there is a forced mate with Rook to H1.

>>8883355
Rook recaptures pawn.

>>8883188
There is also no tennis thread and no sports shooting thread, because this is the science board, not the hobby board.
https://en.lichess.org/R8H62YtaHvq9
Live game.

White knight D4

>>8883188
Kh3 zugzwang

5 cases to consider but any move black makes undefends a critical mating square

>>8883188
h2h1

File: IMG_3390.png (209KB, 1242x2208px) Image search: [Google]

209KB, 1242x2208px

>>8884973
My generator ends with white winning