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Another interesting/instructive loss. https://lichess.org/1qOfsrZXKXiR My two worst moves were, what I considered in the moment, perfectly reasonable tactics where I just didn't see their response through. 10. Qe5+ (hoping for Be7 Qxg7 Rf8 and now I can move the Knight off f3 because g2 is defended) but instead of course he forces the Queen trade that sends me into an endgame with double isolated pawns. Duh. Computer said: apparently castles and letting him trade on f3 is fine. 19. Nxc7 (hoping for Kxc7 Re4 with a discovered check, taking the Bishop up a pawn and his King exposed) but opponent had +4 minutes on the clock and used 1+ of them find Bd6 with me under a minute. Moving the Knight to b5 in the first place is what got me into the trouble, Nd5 was safer and on 19, counterattacking with a3 was best. I also blew WAY too much time here. I had 3:05 on the clock when he 17. ... a6 and it took me nearly 3 minutes to make my next 3 moves (under 10 seconds when I sacrificed the exchange on f5). I eventually, mostly, equalize before flagging (in 10+5, ugh) but still a few good lessons here. Huxley fucked around with this message at 16:42 on Mar 20, 2024 |
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Mar 20, 2024 16:25
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| # ? Apr 29, 2024 02:50 |
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 Don't play the opening on autopilot!
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Mar 20, 2024 23:37
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khazar sansculotte posted:
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Mar 20, 2024 23:42
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jesus WEP posted:you just temporarily sac the knight to win the bishop after Qh4+ or is there something stronger than that? Qh4+ g3 Qe4+ wins the exchange
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Mar 20, 2024 23:45
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jesus WEP posted:you just temporarily sac the knight to win the bishop after Qh4+ or is there something stronger than that? Yeah white is forced to block with the pawn and you win the rook. This is a pattern I recognize instantly from playing a hundred games in the Danish gambit where the same thing happens: 1. e4, e5 2. d4, f3 3. dxe, fxe 4. qh5+ -> the only legal moves are moving the king out or g7. Its also a trap in the Damiano.
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Mar 20, 2024 23:46
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silvergoose posted:Qh4+ g3 Qe4+ wins the exchange
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Mar 20, 2024 23:48
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Oh Kf1 derp yeah you right.
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Mar 20, 2024 23:50
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you’re probably also right in that most people will already be tilted enough to compound the mistake lol
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Mar 20, 2024 23:52
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jesus WEP posted:g3 isn’t forced, white’s probably better just moving their king right? *throws hands up* I GUESS so (you're right, but also that's not a great place to be either)
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Mar 20, 2024 23:55
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when you sac your knight can't they just ignore it and sac their bishop into a pawn, too, and then if you take they take and it's even?
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Mar 20, 2024 23:59
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cock hero flux posted:when you sac your knight can't they just ignore it and sac their bishop into a pawn, too, and then if you take they take and it's even? You can play the check anyway and grab the extra pawn.
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Mar 21, 2024 00:02
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Salt Fish posted:You can play the check anyway and grab the extra pawn. Right, but if they block the check with g3, do you not have to move the queen or lose it? And there's no undefended pieces for the queen take from there. The idea is they take the knight, you check with the queen and then slip over the now open rank to take the bishop. But the pawn is still blocking that rank, and it's defended by g3 now, and the bishop isn't there anyway.
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Mar 21, 2024 00:06
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cock hero flux posted:Right, but if they block the check with g3, do you not have to move the queen or lose it? And there's no undefended pieces for the queen take from there. The idea is they take the knight, you check with the queen and then slip over the now open rank to take the bishop. But the pawn is still blocking that rank, and it's defended by g3 now, and the bishop isn't there anyway. I hate this game.
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Mar 21, 2024 00:10
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cock hero flux posted:when you sac your knight can't they just ignore it and sac their bishop into a pawn, too, and then if you take they take and it's even? After Bxe6 black has Nd3+! Requiring cxd3 and after dxe6 white has to contort themselves to defend the f4 and c3 pawns while black develops with tempo with Be6, b6 (allowing Bb7 threatening the rook or Ba6 threatening the c3 pawn). In most lines the engine eventually gives up one or both pawns. The actual game went 4...Nxe5 5.fxe5 Qh4+ 6.g3 Qe4+ 7.Kf2 Qxh1 8.d4 Qxh2+ 9.Kf3 Qh1+ 0-1. Rough for a 1600 rated player in a daily game, but I've hung mate in 1 from a +8.0 position in a daily game before...
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Mar 21, 2024 01:21
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jesus WEP posted:you just temporarily sac the knight to win the bishop after Qh4+ or is there something stronger than that? There isn't, but you have to see the Nd3+ idea I mentioned above to make it work. Chess.com gave Nxe5 a !!, presumably because of that, otherwise it is just a super common tactic. khazar sansculotte fucked around with this message at 02:05 on Mar 21, 2024 |
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Mar 21, 2024 01:30
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Salt Fish posted:I hate this game.
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Mar 21, 2024 09:44
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my ui on ches.com turned white and i can't figure out how to change it back 
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Mar 22, 2024 17:13
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There's a light UI/dark UI toggle at the bottom of my browser that changes some stuff back and forth but not the entire page.
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Mar 22, 2024 17:20
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Huxley posted:There's a light UI/dark UI toggle at the bottom of my browser that changes some stuff back and forth but not the entire page. Oh bless you
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Mar 22, 2024 17:23
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I checked to see what white looked like and .. good god
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Mar 22, 2024 17:39
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https://lichess.org/training/VejYM I like this lichess puzzle.  There are two tactics. The second one is a defensive move.
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Mar 25, 2024 02:06
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This is one of those I will never be able to see very far into the future, just play the best available move. (I got it the first time  )Here's one for y'all. This puzzle from this book claims it's white to mate in 68.  I loaded it up in lichess/sf with "run forever" settings. After a very, very long time it still says 0.0 Did I get the pieces/colors right? Is this some "ponder perpetual motion" exercise? A joke? 
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Mar 25, 2024 22:05
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I don't know that exact position but it might be a 50 move rule thing where Stockfish would call it a draw because of that. There are some funky positions that are very long forced mates that can't actually be done because your opponent is allowed to claim a draw before the line is finished.
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Mar 25, 2024 22:15
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Unless I'm just misunderstanding, it's white to move and force black to mate in 68. The engine eval is going to tell you the best moves, but the puzzle wants you to find the worst. It's a joke in some sense, but self-mating is a legit puzzle genre.
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Mar 25, 2024 22:16
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Actually "worst moves" is not a good way of putting it. Imagine both players are trying as hard as they can to lose. Can you force black to win despite themselves?
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Mar 25, 2024 22:23
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That makes (slightly) more sense.
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Mar 26, 2024 12:45
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khazar sansculotte posted:Unless I'm just misunderstanding, it's white to move and force black to mate in 68. The engine eval is going to tell you the best moves, but the puzzle wants you to find the worst. It's a joke in some sense, but self-mating is a legit puzzle genre. I don't think it can be a selfmate problem. I think it's just old-timey language for mate in 68. But the tablebase says it's a draw.
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Mar 27, 2024 00:30
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from a blitz game. find the winning move for white! its a quiet move
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Mar 28, 2024 04:21
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Helianthus Annuus posted:from a blitz game. find the winning move for white! That's a nice little puzzle So, what did you do instead?
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Mar 28, 2024 05:57
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Helianthus Annuus posted:from a blitz game. find the winning move for white! Is it Qh7? There doesn't seem to be a way for black to extricate itself quickly enough. Black must move the queen out of the way to avoid being mated, and then will lose the knight and rook. of note, the heroic white knight prevents black from making a battery and spoiling any idea of Qg2#
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Mar 28, 2024 05:57
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fisting by many posted:Is it Qh7? There doesn't seem to be a way for black to extricate itself quickly enough. Black must move the queen out of the way to avoid being mated, and then will lose the knight and rook. thats right, but black is getting checkmated after Qh7 PerniciousKnid posted:That's a nice little puzzle i played Re3 with the idea to get both rooks on the H file 
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Mar 28, 2024 14:48
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Helianthus Annuus posted:thats right, but black is getting checkmated after Qh7 Even after that I'm struggling to find a way to untangle black. I guess g6 and Qc7 would be my candidate moves
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Mar 28, 2024 15:24
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Helianthus Annuus posted:thats right, but black is getting checkmated after Qh7 ahh right, Qxf7# will not be defended by the black queen if it sidles along the 7th rank -- the king will be in its way. I think black can prolong the suffering by starting with Qxd6 but I guess there's just a ladder mate or something soon after black loses all its pieces
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Mar 28, 2024 15:30
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fisting by many posted:ahh right, Qxf7# will not be defended by the black queen if it sidles along the 7th rank -- the king will be in its way. I plonked it into lichess and the move discussed here leads to forced checkmate in 8 Here's the full continuation: 1.Qh7...Qxd6 2.cxd6... Ke8 3.Qxg8+... Kd7 4.Qxb8... e5 5.Re8... Bd5 6.Qc7+... Kxe8 7.d7+... Ke7 8.d8=R+ ... (This was very weird, I can't figure out why stockfish wants to promote to a rook here. I forced promotion to a queen and it's still 8.d8=Q+ ...Ke6 9.Qdd7#
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Mar 28, 2024 17:49
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I think engines are usually programmed to underpromote when they can, as a joke
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Mar 28, 2024 18:09
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that'd be amazing if that's true I was trying to see if there was some stalemate move that underpromoting avoids but I don't see one, so maybe that is actually true though: a general rule to underpromote when that leads to checkmate anyway will spend less processing power on finding lines that avoid stalemates?
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Mar 28, 2024 18:17
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Is there any contrived or joke position where promoting to a queen is undesirable compared to a rook? edit: not counting the joke castling one I posted earlier edit2: oh a stalemate situation that does make sense
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Mar 28, 2024 18:31
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Yeah. For example,  In this position, if white promotes to a queen, black is in stalemate. White must underpromote (or move the king).
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Mar 28, 2024 18:47
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Leperflesh posted:that'd be amazing if that's true i'm pretty sure it's just that two moves that lead to mate in the same number of moves are considered to be functionally identical as far as the engine is concerned, so it doesn't acknowledge the idea that underpromoting isn't a natural move for humans to take. when it has two moves that lead to identical lines it has to give priority to one of them somehow and however it does that tends to favour underpromotion
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Mar 28, 2024 19:37
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This is a famous endgame study that was thought to be a draw until someone realized there was an underpromotion tactic: https://en.wikipedia.org/wiki/Saavedra_position There's also a trap in the Albin Countergambit featuring an underpromotion on move 7: https://en.wikipedia.org/wiki/Albin_Countergambit,_Lasker_Trap While we're talking about endgame studies, I'm working through Yusupov's books and came across this composition by Rinck. Took me about half an hour to solve. White to move: 
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Mar 28, 2024 19:47
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