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Braslav Rabar vs Lev Polugaevsky
Marianske Lazne (1959), Marianske Lazne CSR, rd 14, Apr-25
Sicilian Defense: Kan. Knight Variation (B43)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
Dec-06-21  stacase: Ya gotta see the mate, if only that c2 Pawn weren't there. Ha! 34...Bxb3
Dec-06-21  Brenin: After the complications of last week's POTDs, it's good to have an easy Monday: 34 ... Bxb3 wins a pawn, since if 35 cxb3 then Rc1 is mate.
Dec-06-21  Brenin: In fact, 34 ... Bxb3 wins more than just a pawn. For example, if 35 a5 (saving the a-pawn from 35 ... Bxa4) then Bc4 36 Re4 (Re3 Bf4) Bd5 37 Ree2 b3, with threats of Bb4, or bxc2+ followed by Bb3. If White tries the flashy 35 Bc5 then simply Bxc2+ wins another pawn. Allowing a one-move mate by 35 cxb3 was perhaps White's least painful option.
Dec-06-21  stacase: <Brenin ... Bxb3 wins a pawn, since if 35 cxb3 then Rc1 is mate.>

Yeah, what should White have done? He's about to lose his a4 Pawn as well, what can White do to stop that? And after Black snags the a4 Pawn his b4 Pawn can advance to attack White's hapless c2 Pawn. It's really quite ugly for White, and a grand Monday puzzle.

Dec-06-21
Premium Chessgames Member
  drollere: i had (since white cannot take the B) 34. Bxb3, 35. Kc1 Bxa4, 36. Kb2 b3, 37. cxb3 Bb5, 38. Rf2 Bb4, 39. Rc2 Bxe1
Dec-06-21  hdcc: The king walked into a trap.
Dec-06-21  mel gibson: That's easy but White can't take the black Bishop.

Stockfish 14 says:

34... Bxb3

(34. .. Bxb3 (♗d5xb3 ♗d4-c5 ♗b3xc2+ ♔d1xc2
♖c6xc5+ ♔c2-b1 ♔f7-e7 h3-h4 g5xh4 ♘e1-d3 ♖c5-d5 ♖d2-c2 ♖c8xc2 ♔b1xc2 f6-f5 ♖e2-e3 ♔e7-f6 f3-f4 ♖d5-d4 ♖e3-h3 ♖d4-c4+ ♔c2-b1 ♗d6xf4 ♖h3xh4 ♔f6-g5 g2-g3 ♖c4-c3 ♖h4xf4 ♖c3xd3 ♖f4xb4 ♖d3xg3 ♖b4-b6 h5-h4 ♖b6xa6 h4-h3 ♖a6-a8 f5-f4 ♔b1-c2 ♔g5-g4 ♖a8-h8 ♖g3-a3 ♔c2-b2 ♖a3xa4) +7.44/36 269)

score for Black +7.44 depth 36.

Dec-06-21
Premium Chessgames Member
  al wazir: <hdcc: The king walked into a trap.> One he painstakingly built for himself.
Dec-06-21  Brenin: <hdcc>, <al wazir>: White's moves from 29 on look almost like a self-mate study. What was he thinking of?
Dec-06-21  Abdunnaser: White shouldn't have taken the bishop at b3 instead Bc5 would have saved him
Dec-06-21
Premium Chessgames Member
  agb2002: Black has the bishop pair for a bishop and a knight.

The pawn on c2 stops Rc1#. Hence, 34... Bxb3.

Dec-06-21  saturn2: Original king walk towards the attack.
Dec-06-21
Premium Chessgames Member
  parch: 34...B:b3 35.Nd3
(35.cb3? Rc1# )

35...B:a4

Dec-06-21  Brenin: <Abdunnaser>: 35 Bc5 may "save" White, but 35 ... Bxc2+ followed by capture on c5 leaves him 2P down, with a horrible position.
Dec-06-21  AlicesKnight: ... bxb3 blows away the white Q-side Ps,as recapture of the B gives mate at once. Oh! - he went for the quick end.
Dec-06-21  cocker: As others have noted, White marched his king from g1 to d1, then arranged his rooks so that the king had nowhere to go.
Dec-06-21  TheaN: This Monday is more based on the fact that <34....Bxb3 -+> is free than a set combination, as only 35.cxb3 Rc1# is mate.

White doesn't have a lot, holding on to as much material as possible with 35.a5 will just delay carnage. I wanted to continue with 35....Ba4!? to play b3, but that allows White to create some air and escape. Having said that, SF doesn't really find that much better for Black (Ba4 -4.85, Bc4 -5.1) so I guess winning Pb3 is crucial to the collapse of what was already a shaky White position.

Dec-06-21
Premium Chessgames Member
  chrisowen: Kranz it i oo eunich Bxb3 geronimo it accomodate mo axioms it so kranz it i oo eunich weevils bravo voice i oo v it hippy oo hated it dm flunk it z clung it we it a sunk fjord rivals it z dyp it hick muggle brilliant play brillo i oo pad foggy dr as fladgel eg bain v oo iffy i clubber embibe king it aorta it blush oo kind oo lagoon catch classy cessate faggots oo belch bard v since it read basically oo i na ideas it a roof gobble led it safe inceed it brad oo bale it u v dapper glued it eg i vehement it is joke key dock bb backed it ok blav it brass again oo bold paladin i oo it vues it i oo gallipoli vite pollute oo i gas it kyoto protocol gobble choose it sub cheg oo eg do id c i oo arrived it odd di di Bxb3 cat;
Dec-06-21  TheTamale: This move is more devastating than meets the eye, evidence by the fact that Black opted to end it all rather than continue. (A player of Rabar's strength certainly saw the mate.)
Dec-06-21
Premium Chessgames Member
  Teyss: <TheTamale> Probably. Either he went for seppuku to avoid a slow death, either he was in severe time trouble.
Dec-06-21  Whitehat1963: It took me way too long for a Monday. The bishop sac is a decisive move, but white could easily have avoided the immediate mate and played on stubbornly.
Dec-06-21  johnnydeep: Even I saw the game move and mate threat immediately, but white didn't have to commit suicide so quickly. Time pressure?
Dec-06-21
Premium Chessgames Member
  Once: White's novel experiment of retraining rooks to make a career change as pawns did not end well.

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