Difference between revisions 72270468 and 72287467 on enwiki

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This is a '''sample game of [[chess]]''', recorded in standard [[algebraic chess notation]], and accompanied by commentary.

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==Moves 1-5==
{{Chess diagram|=
| tright
| 
(contracted; show full) |pl|pl|pl|pl|  |pl|pl|pl|=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 6.... d5
}}
'''6.... d5'''


Black makes an excellent defensive move. Moving the king isn't the only way to get out of check!

Admittedly, Black's d-pawn is a dead duck.
It is attacked by White's bishop, queen, and pawn, three times altogether, while it is defended only once, by Black's queen.
The sacrifice is worthwhile, though, to open up lines for the queen and bishop so they can help with the defense.
Now if White fails to find the best continuation, Black has some chance to counter-attack.

Most importantly, Black really has no choice. 6...Kg6? 7.Qf5+ Kh6 8.d4+ g5 9.h4! would leave White with a crushing attack6...Kg6? 7.Qf5+ Kh6 8.d4+ g5 9.h4! would leave White with a crushing attack. Black accordingly prefers this continuation, which gives White a third pawn for his sacrificed piece, but allows Black's bishop on c8 to prevent Qf5+, thus averting immediate catastrophe. If White does not prosecute the attack vigorously, Black can try to get his king to safety and ultimately counterattack with his extra piece.

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{{Chess diagram|=
| tright
| 
|=
 |rd|nd|bd|qd|  |bd|nd|rd|=
 |pd|pd|pd|  |  |kd|pd|pd|=
 |  |  |  |  |  |  |  |  |=
 |  |  |  |bl|ql|  |  |  |=
 |  |  |  |  |pl|  |  |  |=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|pl|  |pl|pl|pl|=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 7. Bxd5+
}}
'''7. Bxd5+'''

White gives check yet again, which prevents Black from doing anything constructivekeeping Black on the run.
Let's review the three ways to get out of check:
#Capture the piece giving check.  Black could play 7...Qxd5.  But White would simply take the queen with 8.Qxd5+, giving White a huge material disadvantage, as well as a continuing attack on Black's exposed king.
#Interpose a piece.  Black could play 7...Be6, but that would allow 8.Qxe6# [[checkmate]].
#Move the king.  Here, this is the only reasonable option. Unfortunately, the only available flight square is g6, leaving the king even more exposed.

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{{Chess diagram|=
| tright
| 
(contracted; show full) |pl|pl|pl|pl|  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 10. Qf5+
}}
'''10. Qf5+'''

The crushing move can be unleashed at last.
⏎
Black has only one legal reply.

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{{Chess diagram|=
| tright
| 
|=
 |rd|nd|  |qd|  |bd|nd|rd|=
 |pd|bd|pd|  |  |  |pd|  |=
 |  |  |  |  |  |  |  |kd|=
 |  |  |  |  |  |ql|  |pd|=
 |  |  |  |  |pl|  |  |pl|=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|pl|  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
|
}}
'''10... Kh6'''

Black had no choice, but n's only legal move. Note how precarious this position is. Black's king is in extreme danger; it's still verly exposed on Black's third rowank, a bad place to be while there are still powerful pieces such as queens and rooks in play.  Black's king has nowhere safe to move, White's queen is extremely near Black's king, and Black's king has an open diagonal right to White's side of the board.  Black's rook on h8 is hemmed in and cannot aid the king, and the king also blocks one of the places Black's knight on g8 could go.
At the end of move 10, the only pieces Black has really developed (by moving it out) is his king -- and that is '''definitely''' not good; the king needs to be protected.  White is relatively poorly developed for being at move 10, but White at least has his queen out, and dangerous location when most of the pieces are still on the board.  While White has a bishop and queen developed, and will get his other bishop into the attack on his next move, Black has only his beking well-compensated by having a superior position compared to Blackdeveloped.

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==Moves 11-14==
{{Chess diagram|=
| tright
| 
|=
 |rd|nd|  |qd|  |bd|nd|rd|=
 |pd|bd|pd|  |  |  |pd|  |=
 |  |  |  |  |  |  |  |kd|=
 |  |  |  |  |  |ql|  |pd|=
 |  |  |  |pl|pl|  |  |pl|=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|  |  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 11. d4+
}}
'''11. d4+'''

White continues the attack with a special kind of check, the [[discovered attack|''discovered check'']].
White moves a pawn, but it isn't the pawn which gives check.
It is White's bishop, attacking from its home square, which delivers the blow.

Note that Black's king has no legal moves, and White's bishop is safe from capture, so interposition is the only option.

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{{Chess diagram|=
| tright
| 
|=
 |rd|nd|  |qd|  |bd|nd|rd|=
 |pd|bd|pd|  |  |  |  |  |=
 |  |  |  |  |  |  |  |kd|=
 |  |  |  |  |  |ql|pd|pd|=
 |  |  |  |pl|pl|  |  |pl|=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|  |  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 11... g5
}}
'''11... g5'''

At this point White has an easy win with 12.Bxg5+ Kg7 13.Bxd8.
The material advantage of a queen and five pawns for a bishop and a knight would be overwhelming.
However, weak players have been known to play on in completely hopeless positions rather than resign.
In order to forestall a long, boring mop-up operation, White looks for a direct kill, forking Black's king and queen and thus securing an overwhelming material advantage. Since this would allow Black to play on for a while, White looks for -- and finds -- an even stronger continuation.

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{{Chess diagram|=
| tright
| 
|=
 |rd|nd|  |qd|  |bd|nd|rd|=
 |pd|bd|pd|  |  |ql|  |  |=
 |  |  |  |  |  |  |  |kd|=
 |  |  |  |  |  |  |pd|pd|=
 |  |  |  |pl|pl|  |  |pl|=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|  |  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 12. Qf7
}}
'''12. Qf7!'''

Truly a masterful move!
White doesn't even call check, but mate is now inevitablhis hems in the Black king, ensuring that it will be unable to escape.

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{{Chess diagram|=
| tright
| 
|=
 |rd|nd|  |  |  |bd|nd|rd|=
 |pd|bd|pd|  |qd|ql|  |  |=
 |  |  |  |  |  |  |  |kd|=
 |  |  |  |  |  |  |pd|pd|=
 |  |  |  |pl|pl|  |  |pl|=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|  |  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 12... Qe7
}}
'''12... Qe7'''

Nothing can save Black short of White forgetting the plan, but there is some logic to Black's move.
Where can White's queen go?
Any of Black's pieces it could take are protected.
If White trades queens, then the attack is over, and Black is winning.
Finally, if White's queen simply retreats, Black will strike back with check: 13...Qxe4+!

But White must have foreseen this possibility, or White would never have played 12.Qf7 instead of 12.Bxg5Black has no remotely adequate move. He plays this in desperation, hoping that White will relent by exchanging queens, or retreating and allowing 13...Qxe4+.

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{{Chess diagram|=
| tright
| 
|=
 |rd|nd|  |  |  |bd|nd|rd|=
 |pd|bd|pd|  |qd|ql|  |  |=
 |  |  |  |  |  |  |  |kd|=
 |  |  |  |  |  |  |pl|pd|=
 |  |  |  |pl|pl|  |  |  |=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|  |  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 13. hxg5+
}}
'''13. hxg5+'''

Black can't get out of this check by interpostion or by moving the king away.
All retreat is cut off by White's well-placed queen.
The only optionSince interposition is impossible, and there are no legal king moves, Black's only possible response to this is to capture the checking piece.

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{{Chess diagram|=
| tright
| 
|=
 |rd|nd|  |  |  |bd|nd|rd|=
 |pd|bd|pd|  |  |ql|  |  |=
 |  |  |  |  |  |  |  |kd|=
 |  |  |  |  |  |  |qd|pd|=
 |  |  |  |pl|pl|  |  |  |=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|  |  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 13... Qxg5
}}
'''13... Qxg5'''

This move by Black saves the king, but leaves Black's queen open to being
captured by a lowly bishop.  Black is now vulnerable to White's playing
Bxg5, and losing his queen, but a worse fate is possible14.Bxg5+ would win Black's queen, but White has even better...

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{{Chess diagram|=
| tright
| 
|=
 8 |rd|nd|  |  |  |bd|nd|rd|=
 7 |pd|bd|pd|  |  |ql|  |  |=
 6 |  |  |  |  |  |  |  |kd|=
 5 |  |  |  |  |  |  |qd|rl|=
 4 |  |  |  |pl|pl|  |  |  |=
 3 |  |  |  |  |  |  |  |  |=
 2 |pl|pl|pl|  |  |pl|pl|  |=
 1 |rl|nl|bl|  |kl|  |  |  |=
    a  b  c  d  e  f  g  h
| 14. Rxh5#
}}
'''14. Rxh5#'''

[[Checkmate]].  Black can't interpose anything, because the rook is giving check from an adjacent square.
Black's king can't move away, because White's queen covers all retreat squares.
Black's king can't capture the rook, because then it would be in check from White's queen.
Finally, Black's queen can't capture White's rook because it is [[Pin (chess)|pinned]].  If it moved away, White's bishop on c1 would be giving check to Black's king.

Notice that, although material considerations are very important in chess thinking, one doesn't win by having the most pieces.
One wins by delivering checkmate.
White was behind in material almost the entire game, including in the final position, but came away with the victory nonethelessis very important in chess, one doesn't win by having the most pieces, but by delivering checkmate.
White won despite being behind in material almost the entire game, including in the final position.
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==See also==
* [[The Game of the Century (chess)|The Game of the Century]]
* [[Chess terminology]]

[[Category:Chess games]]

[[el:Παράδειγμα παρτίδας σκακιού]]
[[nl:Schaakpartij]]

==External links==
*[http://www.supreme-chess.com/java-chess-game/java-chess-game.html Java Chess Game] - Play a game of chess against the computer.