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Jonathan D Tisdall vs Larry Christiansen
Pan Pacific International (1995), San Francisco, CA USA, rd 9, Mar-02
Zukertort Opening: Sicilian Invitation (A04)  ·  1-0



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Kibitzer's Corner
Mar-08-21  saturn2: 39.†Rxf7+†Kxf7†40.†Be6+†Kf8†41.†Qxd5 and white has a won ending
Premium Chessgames Member
  An Englishman: Good Evening: Interesting sequence from moves 12-20. White sacrifices a pawn in order to prevent Black from castling, and yet quickly backs off from that plan and takes control of the dark squares and put a Rook on c7. Fine display of the virtues of mental flexibility in chess.
Mar-08-21  stacase: There have been Mondays that were easier than this. 40.Be6+ doesn't set up mate, it wins back the Rook.
Premium Chessgames Member
  FSR: Not a very sexy winning line, but there's no doubt that it wins.
Mar-08-21  Walter Glattke: What saturn says.
Premium Chessgames Member
  agb2002: White has a bishop and a pawn for a knight.

Black threatens Rxe5 and Rxd3.

The possibility of a double attack on e6 with the bishop suggests 39.Rxf7+ Kxf7 40.Be6+ followed by 41.Bxd5 wins decisive material (40... Kf8 41.Bxd5 Qc8 42.Qe6 leads to a won ending).

Premium Chessgames Member
  rodchuck: 39. Rb8 Rxe4 40. Rxd8+ Re8 41.Rxe8+ Kxe8 42. Kxe2 probably wins too, but clumsy compared to the actual play
Mar-08-21  Brenin: After a tough weekend, an easy Monday, with 39 Rxf7+ winning a second pawn, and the e-pawn to follow soon, giving White an easily won endgame. Better for Black would have been 38 ... Rxd3 39 Rb8 e1=Q+ 40 Kxe1 Re3+ 41 Kf2 Rxe5 42 Rxd8, but White is stlll winning.
Mar-08-21  et1: It was easy because it was the only way to gain an advantage and guarantee a winning end game....
Mar-08-21  nalinw: 39. Rb8 ..... loses a Rook

39. ... e1Q+
40. Qxe1 Qxb8

Mar-08-21  Brenin: <nalinw>: After 38 ... Rxd3 39 Rb8 e1=Q+, White saves the R with 40 Kxe1, not Qxe1. Then Black must play 40 ... Re3+ 41 Qxe3 Qxb8 to avoid losing Q for R. Playing 40 ... Rd1+ is no use, since the White K can escape from R checks on h2, with Bg2.
Mar-08-21  mel gibson: That was easy.

Stockfish 13 says:

39. Rxf7+

(39. Rxf7+ (♖b7xf7+ ♔f8xf7 ♗h3-e6+ ♔f7-f8 ♗e6xd5 e2-e1♕+ ♔f2xe1 ♕d8-e7 ♕e5xe7+ ♘g8xe7 ♗d5-e4 ♔f8-g7 a2-a4 ♘e7-c8 ♔e1-d2 ♘c8-d6 ♔d2-e3 ♔g7-f7 a4-a5 b6xa5 b4xa5 ♘d6-b5 a5-a6 ♔f7-g7 ♔e3-f4 ♔g7-f7 ♔f4-e5 ♔f7-g7 d3-d4 ♔g7-f7 ♗e4-d3 ♘b5-a7 d4-d5 ♘a7-c8 ♗d3-e4 ♘c8-b6 d5-d6 ♘b6-d7+ ♔e5-d5) +11.25/37 67)

score for White +11.25 depth 37

Mar-08-21  Refused: 39.Rxf7+ Kxf7 40.Be6+ Kf8 41.Bxd5 white has a far superior ending if black ever gets there. First he has to deal with the looming threat of Qe6: dual threat of Qf7# and Qxg8+ moves like 41...Ne7 run into Qh8+ Utterly resignable.
Mar-08-21  AlicesKnight: Not hard to find Rxf7+ followed by Be6+ winning back the R and removing any swindles. 38. ... Rd5 was fatal.
Premium Chessgames Member
  chrisowen: Oakwoods Rxf7+ gobble arrive oh buckfast within finest oakwoods wicked it soak grabus revise vamoose quiffer haircut flimsy mintment perjury julychill viz its wicket ticky hares garage keyons revise bodymist Rxd3 fluffs ovidus abattoir labsvalve huffle ruffle Rd5 flushy abracadabra keyons mobydick revise totups hatches divots o gungho goodness acrids mikefast Rxf7+ game;
Mar-08-21  Rama: Tis the Wiz, nice.
Premium Chessgames Member
  chrisowen: Go forward no bd5 divine inspiration.
Mar-08-21  Honey Blend: The interference tactic 35. ♗d7! punishes the passive ... ♘g8, as 35. ... ♕xd7? 36. ♖b8+ ♕d8 37. ♕xd6+ leads to mate.

click for larger view

After 35. ... ♖xd7 36. ♖b8 there's not a lot of options left and Black's best continuation might be 36. ... d3 37. exd3 e2 38. ♖xd8+ ♖xd8 39. ♕xe2 and White has a completely won endgame.

click for larger view

Premium Chessgames Member
  gawain: Once you give up on checkmate, the winning path is clear. The pawns add up to a decisive advantage.
Mar-08-21  TheaN: Unconventional Monday, where everyone solving it today will probably have looked at the screen "this is it?", given we're used to excessive advantages early in the week.

<39.Rxf7+ Kxf7 40.Be6+> puts White in time control, and after <40....Kf8> alternatives are simply worse due to discovers <41.Bxd5 +-> and Black has no play with two pawns down.

The difficulty today really is to not spot the line, it's to spot it's the line to play.

Premium Chessgames Member
  eternaloptimist: It took me a good bit longer to solve this puzzle than a typical Monday puzzle. I played 41.♕xd5 instead of ♗xd5 but it still wins
Premium Chessgames Member
  perfidious: Bit tougher than a normal Monday, not to mention that this POTD 'only' leads to a won ending rather than forcing mate or heavy material loss.
Premium Chessgames Member
  eternaloptimist: <perfidious> Those r some good points & I guess thatís y it took me longer to solve it lol! 😃 I was looking for mate!
Mar-09-21  Nullifidian: I was looking for something a bit more forcing, but couldn't spot anything better than 39. ♖xf7+ ♔xf7 40. ♗e6+ followed by 41. ♗xd5 (or ♕xd5 if you prefer to offer a queen trade in a won position) when the king moves.

It's a won ending because white is two pawns up and will go three pawns up (the pawn on e2 is doomed), but I'm used to quick mates on Monday. I'd say this is at least Tuesday or Wednesday.

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