|Jun-01-06|| ||SEMENELIN: Nbd7 at move 7. was too early and very questionable for black. As white takes an exchange and displacing the knight at Nbd7. The rest for white is the basics of an offense.|
|Jun-01-06|| ||SEMENELIN: At move 12. Nxb3 made more white formidable at move 16. Ndb5. move 18. was a brilliant move!!|
|Jun-06-06|| ||tamar: The move that struck me as great was 14 b4! taking away squares from the queen, Black's only developed piece.|
Testing to see if it had hidden drawbacks, I tried the breakout move 14...d5 to exploit the unguarded b4 pawn.
after 14...d5 15 fxe6 fxe6 16 exd5 Bd6 17 Nf3 Qe3+ 18 Kh1 Bxb4 19 Nd4 Bxc3 20 bxc3
click for larger view
Shredder gives +2.83 and rising.
|Nov-12-09|| ||Whitehat1963: Cavalry charge rains on Paragua's parade.|
|Mar-21-15|| ||offramp: Whenever I see white's name I think of Issi Noho.|
|Mar-21-15|| ||stst: looks like
18.Nc4 to drive the Black Q out of protection (e.g. Qg5) to d6 or e6, then
19.Qxd6+ and Qxe6+ again to leave space for Nd6...
Need a closer look...
|Mar-21-15|| ||siggemannen: What happens after 23... Bb7?|
|Mar-21-15|| ||Abdel Irada: <offramp: Whenever I see white's name I think of Issi Noho.>|
Liviu is the Romanian form of a well-respected old Roman name: that of the Tribune of the Plebs Marcus Livius Drusus, martyred in the cause of conferring Roman citizenship on Italian allies when he was stabbed in the gut by a Senate-hired assassin.
It took him weeks to die, and his last intelligible words are reported to have been, "Who shall succor the Republic in my like?"
|Mar-21-15|| ||scounged: <siggemannen: What happens after 23... Bb7?>|
After 23...Bb7 we may have the following:
If Black takes any of the two Knights, he's in a world of hurt:
26.Qxb7+ and White keeps the piece without getting mated, du to the check.
The same happens if the black King tries to run away:
Now if 26...Kc7 trying to win the knight, we have 27.Rf1, skewering the black rook and queen.
Furthermore, if black does nothing in response to 24.Nd5, White has the nasty threat of Qc3+, which needs to be addressed.
|Mar-21-15|| ||diagonalley: well.... it looked as if that pesky bishop needed to be taken out, but the continuation is not easy to foresee... ok, so black resigned a (trapped) piece down and an exposed K ... am wondering if an engine could salvage his game(?)|
|Mar-21-15|| ||morfishine: Black has 2B vs 2N, but his WSB is undevelopedand and
his King is exposed
The White Queen and Knight on <a3> are
coordinating against <d6> after Nc4; However, an immediate 18.Nc4 is answered
by 18...Qd4+ followed by an exchange of Queens
Thererfore, the exchange-sac <18.Rxf6> presents itself; This eliminates
Black's Q-B battery while trading off Black's only developed piece (not
including the Queen).
Black has two replies:
(1) <18...Qxf6> the Queen drops back from its exposed position at <e5>
and is ready to answer 19.Nc4 with 19...Qe7 covering <d6>; but after
19.Nc4 Qe7 20.Nb6+ White wins a piece and the game
(2) <18...gxf6> 19.Nc4 Qf4 20.Nb6+ Kc6 21.Nxa8 Bd7 22.b5+ this is the move
that preserved the extra piece
|Mar-21-15|| ||M.Hassan: "Very Difficult"
White to play 18.?
White has 2 Knights for Bishop pair
There is a possibility of forking the Black King and the Rook by the Knight jumping from a3 to c4 and then b6 but it is not easy. Black Queen can come to d4 and then capturing Knight on b6. If Queens are exchanged, then Bishop will occupy g1a7 diagonal and White's plan will be aborted. I think White's 18th move will therefore be capturing the Bishop on f6 and Black Queen can no longer come to d4
<if 19...Kc7 to prevent the fork, 20.Qxd6#>
21.Qxd6 Rf8 to attack f2 and possibly mate
23.Kh1 Qe3 to capture Knight in case Queen leaves d6
White has a Knight+pawn extra
Time to check
|Mar-21-15|| ||gofer: The first part of this is simple; spotting the "Nc4, Nb6+" threat, then
working out that Qd4+ stops all that gives us a simple POTD. If we
remove Bf6 from the picture then the Qd4+ defence is not available, but
the Nc4 threat is still very much alive and kicking. So is this
"Saturday" material??? Not really...
<18 Rxf6 ...>
18 ... gxf6
19 Nc4! Qf4
Threatening Rf1 and Nb6+ causing all sorts of issues. So the
open f file is probably a safer bet for black rather than cutting
off its queen from its king!
<18 ... Qxf6>
<19 Nc4 ...>
19 ... Kc6/Kc7 20 Qxd6#
19 ... Qe7 20 Nb6+
19 ... Rf8 20 Nb6+
White is going to win back the exchange at the very least and
black now has to try to take back Na8 without losing the house.
Black is definitely on the back foot with its king out in the
open and its disorganised defenders...
Yes, but was this really "Very Difficult"???
|Mar-21-15|| ||M.Hassan: Black resigned after 24.Rd1 although White had a trapped piece. Analysis shows that White would have had a won endgame:|
White has 3 more pawns and if black wants to promote his a pawn, he has to capture BOTH b pawns of White. Rather impossible without loosing tempo
|Mar-21-15|| ||M.Hassan: <siggemannen: What happens after 23... Bb7?>|
White is a full Rook ahead
|Mar-21-15|| ||CHESSTTCAMPS: Black has the bishop pair versus a pair of knights; otherwise material is even. But black has two big problems - the undeveloped queen-side pieces and the bad location of the king, which is not only vulnerable, but blocks the natural exit of Bc8. Also, there is a big hole at b6 that white would love to occupy with a knight, but an immediate 18.Nc4? is met by 18... Qd4+ 19.Qxd4 Bxd4+ relieving substantial pressure. This suggests ...|
18.Rxf6! to exploit the dark-square weaknesses.
This is not a difficult call, with quick regain of material within a short horizon:
A) 18... gxf6 19.Nc4 Qg5 (forced) 20.Qxd6+ Ke8 21.Nb6 Rb8(21...Ra7?! 22.Qb8?? (Nxc8 1-0) Qe3+) 22.Qxb8 Qe3+ 23.Kh1 Qxb6 24.Qxc8+ wins.
B) 18... Qxf6 19.Nc4 Ke8 20.Nb6 Rb8 (Ra7 21.Nxc8) 21.Qxd6 wins Rb8 leaving white a piece up.
B.1) 19... Kc7 20.Qxd6#
B.2) 19... Qd8 20.Qxd6+ Ke8 21.Qe5 (threatening Rd1, Qxg7, and Nd6+) Rg8 (Bd7?? 22.Qxg7 Rf8 23.Nd6#) 22.Rd1 Qf6 23.Qc7 and the threat of 24.Nd6+ Kf8 25.Rf1 is decisive.
B.2.1) 21... Qf6 22.Nd6+ Ke7 23.Qc5 and the double threat of Rf1 and Nxc8+ is decisive.
B.3) 19... Ke7 20.Qxd6+ Ke8 (Kf8 21.Rf1) 21.Nb6 again wins
Looks overwhelming to me. Time for review....
|Mar-21-15|| ||Penguincw: My guess was 18.Nab5, although I did briefly consider 18.Rxf6 Qxf6.|
|Mar-21-15|| ||devere: 18.Rxf6 is obvious. Black's resignation after 24.Rd1 was peculiar in a team match. Black was losing, but there was still a chance for White to make an error trying to extricate the trapped knight.|
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|Mar-21-15|| ||kevin86: The sacrifice will win quickly.|
|Mar-21-15|| ||agb2002: White has two knights for the bishop pair.
Black threatens 18... Qd4+, trading queens.
This threat and the possibility of further weakening the dark squares around the black king invite to play 18.Rxf6:
A) 18... gxf6 19.Nc4
A.1) 19... Qf4 20.Nb6+
A.1.a) 20... Kc6 21.Nxa8
A.1.a.i) 21... Bd7 22.Qd5+ exd5 23.exd5#, go figure a name for this mate...
A.1.a.ii) 21... b5 22.Qd4 and White has two knights for a bishop and attack. For example, 22... Kb7 23.Qb6+ Kxa8 24.Nxb5 wins.
A.1.b) 20... Kc7 21.Nxa8+
A.1.b.i) 21... Kc6 22.Qd4 with the same conclusion as A.1.a.ii.
A.1.b.ii) 21... Kb8 22.Qd4 (22.Nb6 Qe3+ 23.Kh1 Qxb6) 22... Kxa6 (22... b5 23.Qb6+ as in A.1.a.ii) 23.Nb5 wins.
A.2) 19... Qg5 20.h4 looks similar to A.1.
B) 18... Qxf6 19.Nc4
B.1) 19... Kc7(6) 20.Qxd6#.
B.2) 19... Qe7 20.Nb6+ recovers the exchange with attack. For example, 20... Kc6 21.Nxa8 b5 22.Qd4 Qb7 23.e5 Rd8 (23... Qxa8 24.Qxd6+ Kb7 25.Nxb5 + - [N+2P vs B]; 23... d5 24.Qc5+ Kd7 25.Nb6+ wins a piece at least) 24.Ne4 Qxa8 25.exd6 with an extra pawn and an overwhelming position.
B.3) 19... d5 20.exd5 just further exposes the king.
|Mar-21-15|| ||dfcx: White would like to play
18.Nc4 Qd4! 19.Qxd4 Bxd4 and the game is even. So the key is to take out the bishop.
18.Rxf6 Qxf6 19.Nc4 and black can't defend against both Nb6+ and Qxd6+.
This is as far as I got.
|Mar-21-15|| ||patzer2: The decisive turn setting up today's Saturday (18. ? White to move) puzzle position occurs with a trade of errors at move 17:|
<17. Na3?> This allows Black a game saving move.
Instead White wins with 17. Rf7! when play might continue 17...Ke8 18. Qf3 Rb8 19. Nc7+ Kd8 20. Qf2 b5 21. Nxa6 Rb7 22. Nc7 Rxc7 23. Qb6 d5 24. Nxb5 Ke8 25. Rxe7+ Kxe7 (25...Rxe7 26. Nd6+ Kd7 27. Ra7+ Bb7 28. Rxb7#) 26. Qxc7+ Qxc7 27. Nxc7 Kd6 28. Nb5+Kc6 29. Nd4+ Kd6 30. Ra8 Kc7 31. Ra7+ Bb7 32. Nxe6+ Kb8 33. Ra3 dxe4 34. Kf2 (+3.12 @ 20 depth, Fritz 14 @ 3.6 GHZ on a 4 core i7-4790 with 16 MB RAM)
<17... Bf6?> Black returns the favor with an oversight of his own, overlooking the game saving move 17... b5! when Fritz indicates Black equalizes after 18. Naxb5 (not 18. Rf7? Bb7 19. Qd3 Rhf8 20. Rff1 Rxf1+ 21. Rxf1 Rf8 22. Rxf8 Bxf8 23. Nab1 d5 24. Nd2 Bxb4 25. Nf3 Qd6 to ) 18... Rb8 19. Nd4 Rxb4 20. Nb3 =
<18. Rxf6!!> I missed this winning positional exchange sac, opting instead for 18. Nc4!?, when Fritz gives White a small advantage after 18...Qd4+ 19. Qxd4 Bxd4+ 20. Kh1 Kc7 21. Rad1 Bf6 22. e5! dxe5 23. Ne4 b5 24. Na5 Bb7 25. Nxb7 Kxb7 26. Rd7+ Kc8 27. Rfd1 Kb8 28. g4 h6 29. Nc5 Ra7 30. Rxa7 Kxa7 31. Rd7+ Kb6 32. Rd6+ Kc7 33. Rxa6 h5 34. g5 Bxg5 35. Nxe6+ Kb7 36. Ra5 Bf6 37. Rxb5+ Kc6 38. Ra5 (+0.79 @ 20 depth).
If 18... gxf6, White wins after 19. Nc4 Qf4 20. Nb6+ Ke8 21. Qh5+ Kd8 22. Nxa8 (+3.97 @ 20 depth)
<19. Nc4! Rf8> Moving the Rook to avoid the Knight fork is futile as 19... Rb8 20. Qxd6+ Ke8 21. Rf1 Qd8 22. Qxb8 wins it anyway.
Equally hopeless is 19... Ra7, as White traps the Rook after 20. Qxd6+ Ke8 21. Rf1 Qe7 22. Qb8 .
<20. Nb6+> This is no doubt the most practical win for a human player.
However, for those who enjoy clever tactical complications Fritz 14 finds the strong winning alterative 20. Qxd6+! Ke8 21. Qc5! Bd7 22. e5 Qf4 23. Nd6+ Kd8 24. Nxb7+ Ke8 25. Nd6+ .
<20... Kc6 21. Nxa8 Qf2+ 22. Kh1 b5 23. Qd3 Qf6 24. Rd1 1-0>
Black resigns a clearly lost position. Fritz indicates play might continue 24...Kb7 Nxb5! Kxa8 26. Nxd6 Qd8 27. b5 a5 28. c4 Qb6 29. h3 Qc5 30. Qc3 a4 31. Qa5+ Qa7 32. Qb4 Rd8 33. c5 g6 34. e5 g5 35. b6 Qa6 36. c6 a3 37. Ra1 Rf8 38. Rxa3 .
|Mar-22-15|| ||5hrsolver: <siggemannen: What happens after 23... Bb7?>|
One line is 23..Bb7 24.Nxb5 Pxb5 25.Qc3+ Kd7 26.Qc7+ Ke8 27.Qb8+ Kf7 28.Qxb7+ Kg8 29.Qxb5 Qxc7 30.Qe2 Rf2 31.Qxc2 Rxc2. 32.Rb1 followed by Pb5