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Georges Koltanowski vs Marcel Defosse
"What's All Defosse About?" (game of the day Sep-02-2009)
ch? BEL (1936)
Colle System (D05)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Given 51 times; par: 47 [what's this?]

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sac: 22.Bxh7+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Sep-02-09  310metaltrader: um, i do not see the resignation imperative. the king can escape still at the end. please show me a forced mate at the end?
Sep-02-09  310metaltrader: never mine, i see that black will have to shed another rook to avoid the next mating web
Sep-02-09  WhiteRook48: nice attack
Sep-02-09  SirChrislov: "Not all artists are chessplayers but all chessplayers are artists."

This is an excellent example on how to attack a castled position without a defensive knight on f6. thanks that the rooks were superbly placed on open central files (26.Rd4 was killer!!) and were able to cooperate in the attack. if not, the double bishop sac would've been useless and I'm sure Kolty would've passed on it.

"I never really deeply studied "My System", but I do recommend the section on Overprotection, it's very instructive. and I recommend Koltanowski's books, they're very good!" --Koltanowski

Dec-24-15
Premium Chessgames Member
  eternaloptimist: The Colle System can be fun to play as white but if black plays ...♙g6 & ...♗g7, the ♗ on d3 "bites on granite", & black can normally equalize really easily. Therefore I wouldn't recommend playing the Colle as white in a serious game.
Sep-28-16  dfcx: material is even, black trying to trade bishops.

22.Bxh7+ Kxh7 23.Qh5+ Kg8 24.Bxg7

If black takes the knight,
24...Kxg7 25.Qg5+ Kh7/h8 26.Rd4 and black can stop mate only by giving up the queen.

If black refuses the bishop,

24...f6 25.Qh8+ Kf7 26.Bxf8 Rxf8 27.Qh7+ Ke8 28.Rxe6+ wins

25...f5 25.Qh8+ Kf7 26.Bxf8 Rxf8 27.Qh7+ Kf6 28.Qh6+ wins too

Sep-28-16
Premium Chessgames Member
  Cheapo by the Dozen: Easily recognized as a two-bishop sacrifice kind of position.

That said, I've never played a game in which I either made such a sacrifice, or planned one, or had one made against me. They're pretty rare.

Sep-28-16  mriddle: I got as far as:
22. Bxh7+ Kxh7 23. Qh5+ Kg8 24. Bxg7 Kxg7 25 Qg5+ Kh8 (instead of Kh7) 26. Rd4 but then what about 26... c6? If 27. Rh4+ Qh7 28. Rxh7+ Kxh7 I don't see a clear win for white yet (Q+2P for R+2B). White can also try 26. Qf6+ but then Kg8 27. Rd4 Be5 28. Qg5+ Bg7 seems ok for black. What am I missing?
Sep-28-16
Premium Chessgames Member
  agb2002: The material is identical.

Black threatens Bxe5.

The position looks ready for a double bishop sacrifice 22.Bxh7+:

A) 22... Kxh7 23.Qh5+ Kg8 24.Bxg7

A.1) 24... Kxg7 25.Qg5+

A.1.a) 25... Kh7 26.Rd4 Bf4 27.Rxf4 Qxf4 28.Qxf4 + - [Q+2P vs R+B].

A.1.b) 25... Kh8 26.Rd4 f6 27.Rh4+ Qh7 28.Rxh7+ Kxh7 29.Qh5+ followed by 30.Rxe6 + - [Q+2P vs R+B].

A.2) 24... f5

A.2.a) 25.Bxf8 Bf7 (25... B(K,R)xf8 26.Rxe6 + - [R+2P vs B]) 26.Bxd6 Q(R)xd6 (26... Bxh5 27.Bxc7 Rd7 28.Ba5 Bxd1 29.Rxd1 + - [B+2P]) 27.Qg5+ + - [R+2P vs B].

A.2.b) 25.Qh8+ Kf7 26.Bxf8 Bxf8 (26... Rxf8 27.Qh7+ Kf6 -27... Ke8 28.Rxe8+ Kd7 29.Qh6 + - - 28.Qh6+ + -) 27.Qh7+ Bg7 (27... Kf6 28.Qxc7 wins) 28.Rxe6 Kxe6 29.Qg6+ Bf6 (29... Kd7 30.Qxg7+ wins two pawns at least; 29... Ke5 30.Re1+ Kf4 31.Qg3#) 30.Re1+ wins two pawns at least. The option A.2.a looks simpler and better.

A.3) 24... f6 25.Bxf8 is similar to A.2.a.

B) 22... Kh8 23.Qh5 Rfe8 24.Bf5+ Kg8 25.Qh7+ Kf8 26.Qxg7+ Ke7 27.Bf6+ Kd7 28.Bxe6+ Kc6 29.Bxd8 is crushing.

Sep-28-16
Premium Chessgames Member
  patzer2: My first thought about today's (22. ?) Wednesday puzzle was it's a rerun. Sure enough I previously saw it in 2004. Whether or not it was memory I don't know, but I had no trouble quickly finding 22. Bxf7+ and the game follow-up.

The idea behind 22. Bxf7+ is simple: Demolish the King's pawn cover with our Bishops, drive the King to the h-file and lift our Rook to mate or win the Queen.

Black's decisive mistake was 21...Bd6?, allowing 22. Bxf7+ (+6.87 @ 28 depth, Houdini 4x64).

Instead, 21...Qb6 22. Qf4 (+1.07 @ 28 depth, Stockfish 7) gives Black a fighting chance.

Earlier, I like the computer suggestion 10...b6 11. h3 Nh5 = (-0.11 @ 27 depth, Komodo 9.3 64 bit).

Sep-28-16
Premium Chessgames Member
  YouRang: Wednesday 22.?


click for larger view

Every so often, we get one of these Bxh7+ puzzles, and that time has come around again.

The theme is generally about the same: Use one or two bishops to expose the king, bring the queen in with check, and follow up with a rook lift that threatens mate.

Sure enough, <22.Bxh7+ Kxh7 23.Qh5+ Kg8>


click for larger view

Now comes the other bishop and rook lift: <24.Bxg7 Kxg7 25.Qg5+ Kh7 26.Rd4>


click for larger view

Obviously white threatens Rh4#, and black will need to hemorrhage material to stave off mate.

~~~~~

BTW, black doesn't really fare better by declining either bishop.

- After 22.Bxh7+ Kh8? 23.Qh5 threatens Bc2+ ...Kg8 Qh7#.

- After 24.Bxg7 f6 (to escape Qh8#) 25.Qh8+ Kf7 26.Bxf8 Bxf8 (not 26.Rxf8 Qh7+ 27.Ke8 Rxe6+ ) 27.Qh7+ Bg7 28.Qh5+ Ke7 29.Qg4 (forks both bishops )


click for larger view

Sep-28-16  AlicesKnight: It was not too hard to see the idea - needs a little caution to use the bishops in the right order (using the check tempi) and finding an entry for the R avoiding the sentry Bs, so 22.Bxh7+ Kxh7; 23.Qh5+ Kg8; 24.Bxg7 Kxg7; 25.Qg5+ Kh7/8; 26.Rd4 and now Black must lose material to survive.
Sep-28-16  mel gibson: It's not that easy to see that 2 bishops can be sacrificed.
Sep-28-16  FrogC: In the hands of Colle and Koltanowski, the Colle System looks like a great attacking weapon, ideal for club players, as it doesn't require much learning of variations. Somehow I've never managed to make it work, though. For one thing, most of my opponents, unlike Black here, are sensible enough to leave the knight on f6.
Sep-28-16
Premium Chessgames Member
  beenthere240: Black was pretty oblivious about the impending attack
Sep-28-16
Premium Chessgames Member
  steinitzfan: It's been a number of years since I've seen this game but it was in the first book I read that described the double bishop sacrifice.
Sep-28-16
Premium Chessgames Member
  lost in space: The Standard Double Bishop sac
Sep-28-16
Premium Chessgames Member
  kevin86: black is the victim of the two bishop sacrifice. Then the long range pieces take over and black is doomed.
Sep-28-16
Premium Chessgames Member
  Jimfromprovidence: I got 22.Bxh7+ Kxh7 23.Qh5+ Kg8 24.Bxg7 Kxg7 25 Qg5+ Kh8 26 Rd4 Bf5 (seeing 26...Bh7, which is the point of 25...Kh8)


click for larger view

Black will give one of his bishops back but it still does not matter.

Play continues 27 Qxf5 f6 28 Rh4+ Kg8 29 Qh5.


click for larger view

The threat is mate in 2 after 30 Qh8+. Black must play 29...Qg7 to stop this, then white wins after 30 Rg4.


click for larger view

Sep-28-16
Premium Chessgames Member
  steinitzfan: <Jimfromprovidence> Interesting line of play. It looks like the move 25...Kh8 would have put White to the test.
Sep-28-16
Premium Chessgames Member
  chrisowen: Rucks v h7 hungoffs i x ooh i voom d6 dooroff rooks it was d6 von guv dooroff foot bull o c2 cob h7 hungoust v double it was pet bank hi guv ban hi pit was team guv pan bet von hi guv it was in would guv von h7 hungoust took by h7 hoodbung quod h5 hourly clock by g8 ghosthung v double it was pet bank hi guv ban hi pit was team guv pan bet von hi guv it was in would guv von g7 gongmoon took by g7 ghoulhug lung g5 gourds h7 hungoffs bung bud h8 hungoffly bud d4 doors buck f5 floors took f5 follow 5 comb ugly gum of f6 floorly dous four good hum bud d4 doors o h2 hug by g3 co guns four 5 comb ugly gums on cloud by hourlys o h1 ho o f4 foods bud f4 floor took bud f4 fours bud f4 fords ho off found 6 comb ugly gums of 3 cloud rooks it was d6 von guv dooroff foot bull o c2 cob h7 hungoust v double it was pet bank hi guv ban hi pit was team guv pan bet von hi guv it was in would guv von h7 hungoust hood by 7e it eggshunt guv good runks it was peeve pet von guv kup v puss it was ok guv on hog by rooks it was pass von guv lubbly hubbly coy cod tour fog von guv gun fun luvvly jubbly h7 hungoffs buds by g7 ghoulhug v double it was pet bank hi guv ban hi pit was team guv pan bet von hi guv it was in would guv von h7 hungoust rooks kup pass it was in would q o qu hub off blush by yo doot moot muff fog by d6 dooroff qu buds 7e it eggshunt guv god runks rucks um guff oh do huh mug bug g7 gongmoon gun fun von guv knull luvvly jubbly ooh v double it was peeve pet bank hi guv ban hi pit was team guv pan bet von hi guv it was in would guv pour us bud for won by fluffs hmm doors d6 duffout q clung hood by 7e it eggshead guv good by fly u doors by it ebb it effort von guv by dug um uv clunk by cud cutoff u do bud d6 doorlys bug poor clogus 7e it eggshunt guv good could cont by god u clunk lunk conts hmmm g5 gourds bud it i eddy guv bud c7 clungoff it i eg guv d6 doorsof lug bug h7 hungoust v double it was peeve pet bank hi guv ban hi pit was team guv pan bet von hi guv it was in would guv von h7 hungoust by it i et guv u good by hut it is evers von guv it is emory guv board it ard it ok von guv h7 hoodmonk us by doors lunk dunks by fly us for go fun von guv by mo it i effort von guv it ebb guv u doorhunt o c2 cub buds bonds lug bud d4 doors clunk do out though guv to hog:
Sep-28-16
Premium Chessgames Member
  chrisowen: by go 22Bxh7+ hungoust ho ho hob hock hod ho hoof hog hug hulk hull hum hunt hoh by hur husk hutch how hoy huh h7 hubmouth huckoust hoodbuns hoodugly hoghunts hogjumps hulkdoor dour bud d4 dumps won bud h7 hoodjust hors food dous von guv howbouts hog hug hung ghoul d6 dunkoff von guv double it was peeve pet bank hi guv ban hi pit was team guv pan bet von hi guv it was in would guv von h7 hungoust cob hong gog gung ho gong hoh ghosts g7 ghouls gumbungs gob grub book guv duck von bog bug blubb bob by ho go 22Kxh7 23Qh5+ boot hourly guv though qu off clung by hungof von guv bond hunkly by go hog 23Kg8 24Bxg7 Kxg7 25Qg5+ jobs goodly lunk gourds by hungs 25Kh7 cog hmm huntoffs bug by hunch 25Kh8 26Rd4 Bf5 27Qxf5 fourly hood focusy hocus buds footly flours then flumps 5 comb ugly gums off bud floor f6 floorly job hung four off by do doorly 26Rd4 Bh2+ co hub by gumbug 26Bg3 co guns four 5 comb ugly gums off cloud low us blood by ho hunkoff 27Kh1 Qf4 28Rxf4 Bxf4 29Qxf4 ko off von guv found 6 5 comb ugly gums off vs found 3 jog hug cloud gum mud mod mossy mung god dog duck vs muck dug dumbs d6 von guv douroff von guv 7e it eggshunt von guv choo food o q hoof clout it was peeve pet bank hi guv ban hi pit was team guv pan bet von hi guv it was in would guv von h7 hungoust cob boot cod cud but h7 hungoffs bottoms up it was in would guv von lo monk h7 hubsoffs:
Sep-28-16  GoldenKnight: I was glad to get this one! Koltanowski was a good friend of mine. BTW, he pronounced Colle's name as Collie. He would know as Colle was a good friend of his back in the day in Belgium. I think Colle even mentored him to some extent. And I remember as a youngster in the '60s how Koltanowski tirelessly championed his opening, The Colle System. I still have the autographed copy of the book he wrote by that title.
Sep-28-16
Premium Chessgames Member
  whiteshark: ♗♗ sacs!!
Oct-01-16
Premium Chessgames Member
  patzer2: Correction: In my previous post above, I obviously meant to write 22. Bxh7+ and not <22. Bxf7>.
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