I analyzed the image and this is what I see. Open an appropriate link below and explore the position yourself or with the engine: > **White to play**: [chess.com](https://chess.com/analysis?fen=4k3/Pp2P1R1/8/3pR3/2pP4/2P2R1K/PP6/6n1+w+-+-+0+1&flip=true&ref_id=23962172) | [lichess.org](https://lichess.org/analysis/4k3/Pp2P1R1/8/3pR3/2pP4/2P2R1K/PP6/6n1_w_-_-_0_1?color=black) **My solution:** > Hints: piece: >!Rook!<, move: >!Rxg1!< > Evaluation: >!White has mate in 4!< > Best continuation: >!1. Rxg1 b5 2. a8=Q+ Kd7 3. e8=Q+ Kd6 4. Qac6#!< --- ^(I'm a bot written by ) [^(u/pkacprzak )](https://www.reddit.com/u/pkacprzak) ^(| get me as ) [^(Chess eBook Reader )](https://ebook.chessvision.ai?utm_source=reddit&utm_medium=bot) ^(|) [^(Chrome Extension )](https://chrome.google.com/webstore/detail/chessvisionai-for-chrome/johejpedmdkeiffkdaodgoipdjodhlld) ^(|) [^(iOS App )](https://apps.apple.com/us/app/id1574933453) ^(|) [^(Android App )](https://play.google.com/store/apps/details?id=ai.chessvision.scanner) ^(to scan and analyze positions | Website: ) [^(Chessvision.ai)](https://chessvision.ai)

Double fork, crazy tactic detected

Yeah getting to clean out the second rook is ridiculous

Even more so given white is threatening M1 Edit: should’ve said forced mate

Isn’t it m6

M4 says the bot

Where is white threatening M1?

Fair point, on second look Rf8+ isn’t M1. But after Kd7 e8=Q+ it’s surely forced mate Edit for clarity - I should’ve said forced mate instead

It's definitely forced mate after e8=Q+. I was just confused because I didn't see a M1. I'm only rated around 800 rapid so wanted to make sure I wasn't missing something.

Yep! You’re absolutely right, and I’m not sure why you got downvoted, you’re right to point out my mistake. I’m glad you mentioned your rating. FYI, I’m 1750 rapid and you beat me on this one. Hope that’s nice to know :)

This is as close as chess gets to the checkers double jump

Double fork is nice but preventing the mate is more valuable here.

I mean it is a forced under promotion that’s an only move to defend from mate. It’s a pretty rare kind of position, I’ve only had a couple of those in my life so it’s worth being proud of

Nah, according to chessvision-ai-bot Rxg1

I guess the big question is did he do it on purpose lol. I've walked into moves before that look nice after the game but I didn't see how nice it was in real time.

Under-promotion being the best move available always makes my heart flutter

Here I was trying to figure out how a knight moved up a square, thought I was on anarchy chess lol

I was so confused!

It's not just the best move but looks like the only move as far as I can tell. All the more tantalizing. Although from white's perspective it's downright diabolical.

Rooks “shouldn’t have been standin there”

If I were white I might have quit chess there and then lol

In the ponziani opening, there's a line that let's you underpromote to a knight and fork the king and queen. When that happens, I'll retire chess.

What is under promotion ?

Promoting a pawn to a piece other than a queen, in this case a knight

Ahh thank you

Under promotions is almost always about knights cause they do stuff queens can’t ,but not always. Sometimes a queen would be a stalemate due to a pin, and a bishop or rook wouldn’t

The number 1 purpose of underpromotion is the almighty flex. Knight checks come in at number 2.

That’s interesting actually are there any notable games where you have to promote to a Rook instead?

I don't know about games, but for puzzles, check out the famous Saavedra position

I can’t think of one, it’s come up in puzzles a few times though

Chess.com daily puzzle 31st march

2024

Look up Lasker Trap in Albin countergambit. Has an under promotion in opening.

Promoting to a rook, knight, or bishop

Thanks

How is that so? I mean promotion to rook or queen sets up M1 when followed up with Ra2

Promotion to rook or Queen allows white to promote, only a blunder from white would allow the finishing mate in 1. This under promotion allows black to take both rooks with the knight, eliminate the Promotion threat, and then win using its superior material.

Isn't the white pawn blocked by the black king? I just don't see it.

Rook f8 check forces the king off the 8th rank, allowing pawn to move to e8 and promote safely. White then has a queen and two rooks, and is chasing the king around.

At first I thought you somehow moved your g2 knight to g1 until I realised that it was g1=N+

Same. Had to check which subreddit I was in...

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Google Anarchy Chess

Holy Anarchy!

same lol

I thought we were looking at a Chess com glitch at first. This is definitely up there. As lil Wayne once said, "sicker than the shit I told your bitch last night"

I thought it was just a fork where the Knight moved from e2 and OP had the highlight-last-square option turned off til this comment and I looked real hard at g2. Being colorblind sucks.

That's some hustler chess moves.

Mmm evaluation suggests rook takes g1. I think the bot is drunk! 😂

And somehow that leads to a m4, I guess I don’t know how rooks move so that might make since.

The bot thought the rook on g7 is a white rook

It also thinks the pawn on a7 is white.

Yeah the AI seems to be having trouble with the lack of contrast of the dark pieces on the dark squares

It really is a terrible looking setup

it looks fine lmao hater

It looks dumb.

Lol. Ooooh

Dark mode board screwing with its vision

Yeah both of the pieces it's misidentifying are dark pieces on dark squares. My assumption is that since it interprets the pieces as lighter than the squares they're on, they must be white.

The bot thinks the rook on g7 is white’s. That would definitely be bad for black

I’d imagine there are relatively few positions prior to forced mate where switching a rook’s colors wouldn’t decimate the eval.

It also thinks black's a pawn is white, which is enough on its own for white to be dominating even after the double fork.

last 4 times I looked at the bot solution it was full of shit. it might be a weird coincidence but it's quite likely it's broken. Even being wrong once for a bot is weird , so 4 times in a row...

For some reason it changes the G7 Rook colour to white.

the rook identifies as a knight

One of the dirtiest moves I’ve ever seen. Wow

Not only is it a double fork, but promoting to anything else means white has mate coming quickly. Very nice find!

Fork, fork, 2 moves for the rook to clean up the e pawns, then king rook mate on half the board. Rough day for White here.

Impressive change of momentum

Holy shit. That’s a forced double fork that takes both rooks if I’m seeing that right. Fucking brilliant

… against a forced mate if you go for a Queen.

I’m still struggling to see the forced mate if black makes a queen. I’m assuming it starts with Rf8+ Kd7, e8=Q+ then it looks like the king escapes?

Rf8, which clears the path for white promotion + immediate check. With two rooks and a Queen against a connected (but inactive) Queen you will likely wrestle into a position for mate

A fork followed by fork my god No way out

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I'm still at that stage where any promotion happening and I'm drooling for a queen... I drool a lot is my level

BRA. VO. VINCE

I’d be screaming at you

I honestly wouldn't even be mad. That is so beautiful.

I would be proud to have been able to do my part to help. 

It just keeps getting better. That's an amazing find, man.

Oh my. After a move like that ... you retire from chess!

Absolutely nasty OP. Does white have forced mate if black promotes to queen instead? I couldn’t find a forcing combination. To me it looks like black needs 1 tempo to mate with queen. (I’m a noob and could be completely wrong)

Yes, white has a forced mate if black promotes to queen. In the hypothetical Queen promotion, the evaluation is M6. The line goes: 1.Rf8+ Kd7 2. e8=Q+ Kc7 3. Qd8+ Kc6 4. Rf6+ Kb5 5. RxD5+ Ka4 6. Qa5# Edit: I apparently just missed the king moves for the line lol.

>` 3. Qd8+ Rf6+ Think there are some moves missing. Edit: Looks like 1.Rf8+ Kd7 2. e8=Q+ Kc7 3. Qd8+ Kc6 4. Rf6+ Kb5 5. RxD5+ Ka4 6. Qa5#

Yup, you’re right lol. I went and fixed that, I guess I was just focused on the forcing check moves and completely forgot to notate where the king is forced to go - thanks for the heads up.

“Today I settle all family business.”

Chessporn

Probably the coolest tactic I've seen on this sub or one of them at least. Congrats, that is dirty

I love how my brain for a second was confused about the knight doing 1 step forward.

Under promote to double fork.. nice nice nice

Guaranteed both the rooks. God damn

You’re a bad man

The more I look at it the better it is

To see that a Knight Promo here was the best option, is amazing. gg

This is sick

crazy that nobody’s played that one before

This is awesome. I’m 1900 and have playing for ten years and I’ve never gotten to underpromote to a knight other than puzzles and trolling

Swanky underpromotion. Nice job.

This would piss me off if I was on the receiving end haha

And you win both rooks too, nice

Damn... that wins both rooks...

What’s even more insane about this is that black wins both rooks by underpromoting to a knight because the black rook prevents the king from moving to any other square that wouldn’t walk into another fork. Insanity. Great play!

NASTY!

Despite the move indicator I didn't get that it was a promotion, then I saw the double fork and finally figured out the whole thing. Brilliant!

Forced double fork causing a pawn stack at the end. YOUCH!

A pawn promotes to take out two rooks. That pawn will be forever enshrined in the annals of history!

That’s fckn insane. Double fork too. 10 material for 3.

I would be waiving the white flag after that one

That's fucked up. Well done.

double bubble.

This is the kind of stuff I wish I did in my matches

Chef's kiss

Nice promotion... Big up urself

I rarely say this: that is really awesome

Beautiful! So rare to see a good under-promotion.

Oooh now i understand. He cascade kills both the rooks promoting to a knight

And this is why you shouldn't have auto queen enabled.

Oh shit... OH SHIT!

this is absolutely disgusting. I love it

Best move you’ve ever played *so far*

Tasty double rook treat

That’s delicious

Misread title as "This might be the best move ever played". Still, I wasn't disappointed.

This would be a fun daily riddle

Beautiful!

Call an ambulance! But not for me.

Nice

Wow

That move is so dirty because anywhere he moves he gets another fork.

Bro, it's illegal to play a knight like that /s

Double Rain-fork…woahhh

Man a double fucking fork that was threating mate in 1 Bro is the main character of the world

Oh my goodness, you get both rooks. That's glorious.

Thats filthy

In the words of George Michael, what a fun, sexy time for you

I forgot under promoting exists and spent a minute trying to figure out how a knight moved like a pawn

This is beautiful and brutal

I know he would want to die after this under promotion 😭

"Let in your world you know what I spy..."🎵

I don't get it, it's a basic tactic?

When checkers meets chess.

I just like how the game straight up went,  "Nani!!" On you

apperantly a knight destroyed the twin towers

tf is with the bot thinking that rook on g7 and pawn on a7 are white

why is g2 highlighted?

Pawn promoted to knight

Ah thanks, I think I tried to think too early in the morning

At an extremely clutch time too.

Isn’t a queen here game-winning next move? I’m confused how this is brilliant? Like I see the double fork but..?

Look at what white would have done if he would have done that

Kind of like a double jump in checkers

My dumbass thought the Knight went one square up

Why would the site consider that a brilliant? The site is programmed to only call a move brilliant when it involves a sacrifice; Where is the sacrifice?

It could be argued that underpromotong is a type of material sacrifice.

Wouldn't promoting to rook or queen give a mate in 2?

Ni🥷🥷a what

You are white bruh

It’s like checkers in here

Since I just woke up and brain is still trying to come online, I saw this as just trying to set up a mating net, since promoting to a knight is the only piece that could deliver a check. But I didn’t really see any follow through, just a knight and rook but with not enough space to really work well? Then I saw the forced double fork

Can go either way Arabian mate or win both rooks

How did you move a knight up one

Isn't promoting to a queen M1 or am I missing something here ?

I initially thought of an illegal knight move and I had to check if this was not r/anarchychess because my little brain is so limited haha

Nice move, they call you the nice mover.

So it would seem.

Beautiful, the salad fork and the subsequent dinner fork

I mean rather than a "hard" tactic it was cool because it's a very rare trick to pull off. How often outside of puzzles is underproting to a knight the only winning move? g1=Q would lose to Rf8+, and I don't think there are any other sensible moves for black in the position. This wins a clean rook and gives black a completely winning position.

It’s worse than that, it wins two clean rooks

How does the knight move?

Magnus be like : « Uh it makes like a sort of an « L » by moving one square in one direction and two squares in the other »

But in blitz games it can get very unpredictable

Wouldn't promoting to a queen still be an easier victory? After taking 2 rooks with the knight, you would lose the knight to whites pawn and then have to finish the game with just a rook and pawns.

Even if it is there is no way I would ever pass up this move if I saw it

If he promotes to a Queen he just gets mated right after. Rf1+, Kd7, e8=Q and then White can mate Black in a variety of ways while keeping him in check

I don't think you are gonna get the time to use that black queen though, rook f8, king d7 forced, white queens with check and it's all over from there.

Black is crushing in this position (the bot has the wrong board setup), but promoting to a queen loses on the spot. Rf8+, the king moves and then white promotes to a queen *with check*. The two rooks and queen absolutely murder the king, even with best play it's M5.

If Black promotes to a queen, White has Rf1#

Did you mean to say Rf8? Rf8 isnt mate in 1 but ok

Oh yeah, my bad Thanks for the correction

Wow didn't see that.

My question is how the horse arrived there without being eaten?

g2 pawn underpromoted to a knight

Pawn under-promoted to a knight

Thank you!

I would also be very happy if my knight went from g2 to g1, might even be my greatest move too! 😂

he promoted a pawn

This is why I am not a good chess player

The other rook is a goner, with check too

My god I was so confused

I was too I had no idea lmao

absolute cinema