Jun-04-06
 | | tpstar: A rare variant of the Accelerated Fianchetto where White recaptures 4. Qxd4, then kicks the KN with 5. e5, whereupon Black kicks the Q with 5 ... Nc6 leading to 6. Qa4 Nd5 7. Qe4 with a safe centralized Queen. Interesting that Black avoided 15 ... Nxg5 16. hxg5 but jumped at 16 ... Bxg5!? 17. fxg5 and the half open f file helps White, plus those weak dark squares on the Kingside. Note 20 ... Kg7 21. Be5+ Kh7 22. Rf7+ mates, thus 20 ... Ke8 and White regained the piece (21. Qxg6+ Kd8 22. Qxe6). Then 23. Qf7 threatened Mate in Two (24. Qf8+!), but 23 ... Re8 should lose to 24. Nd5, so I don't see a good defense for Black. tpstar-dnptrs (QueenAlice 6/3/06) [Fritz 7]: 1. e4 c5 2. Nf3 g6 3. d4 cd 4. Qxd4 Nf6 5. e5 Nc6 6. Qa4 [last book move] Ng8 7. Nc3 Bg7 8. Bf4 Nh6 9. h3 0-0 10. Bd3 [10. 0-0-0 d6  ] f5 [10 ... d6 11. ed Nf5 12. de Qxe7+ 13. Qe4  ] 11. ef [11. Bc4+!? Kh8 12. 0-0-0 ] Rxf6 12. 0-0-0 e6 [12 ... d6!? ] 13. Bg5 1-0. |
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| May-07-21 | | stacase: 18.Bxf7+ That took about two seconds |
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| May-07-21 | | mel gibson: Like stacase - I saw it in under 2 seconds.
As it's a difficult problem -
I therefore claim Einstein status.
Stockfish 13 says:
18. Bxf7+
(18. Bxf7+
(♗d5xf7+ ♔e8xf7 e5-e6+ ♔f7-g7 ♕e4-e5+ ♔g7-h7 e6xd7 ♕c8-d8 ♖h1-f1 ♖h8-f8
♖f1xf8 ♕d8xf8 ♕e5xc7 ♖a8-d8 b2-b4 ♗b7xg2 b4xa5 b6xa5 ♖d1-d2 ♗g2-h3 ♖d2-f2
♕f8-g8 ♖f2-f7+ ♕g8xf7 ♕c7xd8 ♕f7-e6 ♗g3-f2 ♕e6xd7 ♕d8-f8 ♕d7-f5 ♕f8xe7+
♔h7-g8 ♘c3-e4 ♕f5-f4+ ♔c1-b2 ♕f4-f7 ♕e7-d8+ ♕f7-f8 ♕d8-d5+ ♕f8-f7 ♘e4-f6+
♔g8-g7 ♕d5-e5 ♕f7-e6 ♘f6xh5+ ♔g7-f7 ♕e5-g7+ ♔f7-e8 ♘h5-f4 ♕e6-d6 ♘f4xh3
♕d6-b4+ ♔b2-c1 ♕b4-a3+ ♔c1-d2 ♕a3xa2 ♕g7xg6+ ♕a2-f7 ♕g6xf7+ ♔e8xf7 h4-h5
a5-a4 ♗f2xa7 a4-a3 ♘h3-f4 a3-a2) +11.26/44 371) score for White +11.26 depth 44 |
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| May-07-21 | | Messiah: Terrible! |
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| May-07-21 | | Walter Glattke: Both are Russian masters, but Osnos defeated GM often and lost against masters, this position here is incredible ripe for storm.
18.Bxf7+ Kf8 19.Qxg6 Bxg2 20.Rhg1 Bxg1 21.Rxg1 Ne6 22.Bg8+ Nf4 23.Qf7#
18.Bxf7+ Kxf7 19.e6+ Kg7 20.Qe5+ Kh7 21.Rxd7 wins /19.-Nxe6 20.Rhff1+ Kg7 21.Be5+ Kh7 22.Rf7+ Kg8 23.Qxg6+
They played 20.-Ke8 21.Qxg6+ Kd8 22.Qxe6 Qc6 and now one could play 23.Qe5 Rg8 24.Nd5 e6 25.Nf6 |
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| May-07-21 | | Huckleberry Finn: Is castle, instead of Nc7 holdable for black? |
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| May-07-21 | | Brenin: <Huckleberry Finn>: After 17 ... 0-0 18 Bxb7 Nxb7 19 Nd5 Re8 White has an advantage (initiative, space), but Black is still alive. Perhaps 17 ... Bxd5 18 Nxd5 Rb8 and Q-side action with 20 ... b5 is his best plan. |
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| May-07-21 | | agb2002: White has the bishop pair for a bishop and a knight. Black threatens Nxd5.
The black king is the sole defender of f7. This suggests 18.Bxf7+: A) 18... Kxf7 19.e6+
A.1) 19... Nxe6 20.Rhf1+
A.1.a) 20... Kg7 21.Be5+ Kh7 (21... Kg8 22.Qxg6+ Ng7 23.Qxg7#) 22.Rh7+ and mate in two. A.1.b) 20... Kg8 21.Qxg6+ Ng7 22.Qf7+ Kh7 23.g6+ Kh6 24.Bf4#. A.1.c) 20... Ke8 21.Qxg6+ Kd8 22.Qxe6 recovers the piece with an overwhelming position. For example, 22... d6 23.Rxd6+ exd6 24.Qxd6+ Qd7 (24... Ke8 25.Re1+ and mate soon) 25.Qf6+ Kc8 26.Qxh8+ wins decisive material. A.1.d) 20... Nf4 21.Qxf4+ Ke8 (else 22.Qf7#) 22.Qf7+ Kd8 23.Qf8+ Rxf8 24.Rxf8#. A.2) 19... dxe6 20.Rhf1+ Kg7 (else 21.Qxg6#) 21.Be5+ and mate in two. A.3) 19... Ke8 20.Qxg6+ Kd8 21.Rxd7+ wins decisive material. A.4) 19... Kg7 20.Qd4+
A.4.a) 20... Kg8 21.exd7 Qd8 22.Bxc7 Qxc7 (22... Nc6 23.Qd5+ and Bxd8 wins) 23.d8=Q+ wins an exchange. A.4.b) 20... Kh7 21.exd7 Qd8 22.Rhf1 Rf8 (22... Kg8 23.Bxc7 Qxc7 24.Qd5+ and mate in two) 23.Rxf8 Qxf8 24.Bxc7 wins decisive material. A.5) 19... Kg8 20.Qxg6+ Kf8 21.Qf7#.
B) 18... Kd(f)8 19.Qxg6 wins decisive material (18... Kd8 19.Qxg6 Bxg2 20.Rhg1 Bf3 21.Rdf1 followed by Qg7). |
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May-07-21
 | | rodchuck: I like Messiah's deep insights into the last few games - they are really terrible! |
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| May-07-21 | | asiduodiego: A good example of a one-two punch. First I tried something on the Queenside, but it all lead to trades which improved Black's position. The key in the position is that almost all of Black's pieces are on the Queenside and the king is uncastled. That situation screams for a punishment on the Kingside. So the thematic bishop sacrifice on f7 is of course the most direct option. I imagined the bishop screaming: "Me, me!, let me go in, coach!". So, ok, 18 Bxf7! Kxf7 (refusing the sacrifice, of course, is not an option: after Qxg6, the Queen has entered the position with catastrophic results). Ok, but what comes next?. I noticed that after the rook check (probably the h-rook, because the d-rook is already centralized), Black's king finds sanctuary in g7. There is no way to attack it immediatly, because he's on a dark square, and there is no follow-up check: my pawn on e5 is blocking access to the dark squares. Then it dawned to me, 19 e6+!. The dark squares are now open. After 19 ... Nxe6 (of course, 19 ... dxe6 is just suicidal, opening more lines in the center, and the analysis remains the same), now comes 20 Rhf1+: the king has no sancturary on the Kingside anymore. Now 20 ... Kg7?? leads to 21 Be5+, and checkmate is soon to follow, because the rook can infiltrate to f7 and the queen is threatening g6, and Black cannot cope with both threats at the same time. So, the sad option is to hide in the center 20 ... Ke8 21 Qxg6+ pushes the king to the d-column, and White will regain the piece. I didn't analyze further, but in this situation, all of White's pieces are fully developed and operational, and Black's king is now stuck in the center with all the enemy's major pieces roaming around him. Strategically, Black's lost already. A very nice Friday puzzle. A good example of a "one-two" punch to open the position, and fully activate the potential of all the pieces. It's a good lesson: if you spot a good sacrifice, consider very carefully the follow-up. The bishop sacrifice indeed works, but it needs an additional punch to activate the full potential of the attacking pieces. |
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| May-07-21 | | Cellist: I saw the first two moves but did not calculate any further because of time constraints. I continued with "guess-the-move" and figured out most of the combination although I twice chose different moves (23. Rxd7+ instead of Qf7 and 24. Rfe1 instead of Bxd6). Both moves also win clearly. |
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May-07-21
 | | chrisowen: Realty keys i Bxf7+ hubbub a flush photon beam i keys blubbered it vested it bye keys i realty again berserk mp quango keys doggy fawns nile winning lines it vulcan cuz jezebel its a neck again thors keys prognosis keys aorta body wax line measly keys i Nc7 gifted it ok key o abattoir ave it eek blank Rb8 finish abracadabra keys blank baulk gob fraggier o tot add hunches aileron koinus ajar aorta banjo job hubbub its pearl Bxf7+ either? |
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May-07-21
 | | benveniste: No points for me today. While I found ♗xf7, I didn't find e6. |
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| May-07-21 | | Refused: 18.Bxf7+ Kxf7 19.e6+ and white just breaks through with qxg6+ at some point. The problem is the black king can never venture onto the kingside with Kg7 as Be5+ just makes things worse. |
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| May-07-21 | | drollere: i had something like 18. Bxf7+ Kxf7, 19. e6+ dxe6, 20. Rhf1+ Kg7, 21. Be5+ Kh7, 22. Rf7+ Kg8, 23. Qxg6# |
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| May-07-21 | | drollere: <Messiah: Terrible!> messiah: ignored! |
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May-07-21
 | | perfidious: Clever combination in a position which begged for such a solution to put Black out of his misery. As to the 'insight' provided by the poster named by <drollere>and <rodchuck>: good riddance to bad rubbish. |
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May-07-21
 | | Jimfromprovidence: Like others have very well stated it's what you do after 18 Bxf7+. You have to figure out 19 e6+ instead of 19 Rhf1+, 20 Rhf1+ instead of 20 Rdf1+, etc. (doing this while your queen is en prise). I also liked the kind of subtle 23 Qf7.
click for larger view That move reveals the threat of a queen sacrifice then mate after 24 Qf8+ Rxf8 25 Rxf8#. <tpstar> had mentioned this back in 2006. |
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| May-07-21 | | drollere: <I also liked the kind of subtle 23 Qf7.> i looked at 23. Qf7 Re8, 24. Nd5 d6 to defend, before i followed JfP's hat tip and found <tpstar> did the same. JfP illustrates the point i made a GOTD or two ago, that computer derived "best moves" don't reveal the complexities of a position, or that more than one solution is practicable and can be esthetically more pleasing. computer analysis and human analysis are both insightful, of course; it's a matter of giving each its due and proper weight. |
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| May-07-21 | | thegoodanarchist: The dangers of not castling. |
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May-07-21
| | Jimfromprovidence: <drollere> Thanks for your pithy, relevant comments. Pithy: "brief, forceful, and meaningful in expression; full of vigor, substance, or meaning". |
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| May-07-21 | | RandomVisitor: After 7.Qe4 maybe Nb6 is better
click for larger view Stockfish_21042813_x64_modern:
65/74 3:30:07 -0.00 7...Nb6 8.Nc3 Bg7 9.Bf4 d5 10.exd6 Bf5 11.dxe7 Qd7 12.Qe3 Nb4 13.Rc1 Nxc2+ 14.Rxc2 Bxc2 15.Bb5 Bxc3+ 16.Qxc3 Qxb5 17.Qxh8+ Kxe7 |
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Kibitzing
Annotations by 
sac: 18.Bxf7+
