Difference between revisions 72087184 and 72270468 on enwiki

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

<br style="clear:both" />
==Moves 1-5==
{{Chess diagram|=
| tright
| 
(contracted; show full)    a  b  c  d  e  f  g  h
| 7. Bxd5+
}}
'''7. Bxd5+'''

White gives check yet again, which prevents Black from doing anything constructive.
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 queen with 8.Qxd5+
. , giving Whith suche a huge material disadvantage and an exposed king, Black could resign without feeling like a quitter, as well as a continuing attack on Black's exposed king.
#Interpose a piece.  Black could play 7...Be6.  B, but that would be inadvisable, because the bishop would be defended only once (by Black's king) and attacked twice (by White's queen and bishop).  In fact, White could end the game at once with 8.Qxe6# [[checkmate]].
#Move the king.  Alas, the only square which is not under attack by White is g6, even further into the open.  It beats the alternatives, thoughallow 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.

<br style="clear:both" />
{{Chess diagram|=
| tright
| 
|=
 |rd|nd|bd|qd|  |bd|nd|rd|=
 |pd|pd|pd|  |  |  |pd|pd|=
 |  |  |  |  |  |  |kd|  |=
 |  |  |  |bl|ql|  |  |  |=
 |  |  |  |  |pl|  |  |  |=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|pl|  |pl|pl|pl|=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 7... Kg6
}}
'''7... Kg6'''

Now White has gotten three pawns, a rough equivalent for his sacrificed piece, developed his pieces with gain of time, and forced Black's king into a very dangerous position. However, White must continue the attack energetically; if he does not do so, Black may be able to bring his king to safety and use his extra piece effectively.⏎
White would like to play 8.Qf5+, driving Black's king to h6 where it can be cornered and checkmated, but Black's c8 bishop is guarding the square f5.
If Black hadn't interposed with 6...d5, Black would now be subject to a forced checkmate.
As it stands White has to be more creative to keep the initiative.

<br style="clear:both" />
{{Chess diagram|=
| tright
| 
|=
 |rd|nd|bd|qd|  |bd|nd|rd|=
 |pd|pd|pd|  |  |  |pd|pd|=
 |  |  |  |  |  |  |kd|  |=
 |  |  |  |bl|ql|  |  |  |=
 |  |  |  |  |pl|  |  |pl|=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|pl|  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 8. h4!
}}
'''8. h4!'''

Again White finds a strong continuation.
White is, threatening to force the Black king to h6 after all with h5+.⏎
Also the pawn protects the g5 square, which may turn out to be important down the road.
Finally, there is now some chance the rook will be able to join the attack down the h-file.

<br style="clear:both" />
{{Chess diagram|=
| tright
| 
|=
 |rd|nd|bd|qd|  |bd|nd|rd|=
 |pd|pd|pd|  |  |  |pd|  |=
 |  |  |  |  |  |  |kd|  |=
 |  |  |  |bl|ql|  |  |pd|=
 |  |  |  |  |pl|  |  |pl|=
 |  |  |  |  |  |  |  |  |=
 |pl|pl|pl|pl|  |pl|pl|  |=
 |rl|nl|bl|  |kl|  |  |rl|=
    a  b  c  d  e  f  g  h
| 8... h5
}}
'''8... h5'''

Black plays a tenacious defense in a precarious situation.
White's pawn is blocked from further advances, andThis, or 8...h6, is the only chance for Black, avoiding the threat of 9.h5+, and giving the king has a newan escape square on h7.
Black's position is stillremains precarious, but there iWhite has no immediate way for White to forced checkmate.

Now let us take a step deeper into chess reasoning.
White knows Black is on the run for the moment, but if Black has a chance to regroup, the game is far from over.
Three pawns for the sacrificed knight is roughly material equality.

If White brings additional forces forward with 9.Nc3 or 9.d4, the obvious developing moves, Black will harass White's queen with 9...Bd6.  That would force White to lose time protecting the queen.  Black would gain time to get the blackpauses for development with 9.Nc3 or 9.d4, Black will harass White's queen with 9...Bd6, gaining time for Black to develop his pieces out and get the blackhis king to safety.

White desperately wants a quick kill, but can't see how to get it.
White is annoyed that Black's bishop on c8 prevents White from playing 9.Qf5+ and administering the coup de grace.
Therefore White asks the question, "What if Black's bishop were not on c8?
If only that annoyance were removed, I could do great things."Further reflection shows White that Black's bishop on c8 is the only thing saving Black from immediate disaster. If it weren't there, White would win immediately with 9.Qf5+ Kh6 10.d4+ g5 11.Bxg5+ winning the queen. White realizes that since Black's bishop also is guarding Black's pawn on b7, it is overburdened. That suggests White's next, crushing move.

<br style="clear:both" />
{{Chess diagram|=
| tright
| 
|=
 |rd|nd|bd|qd|  |bd|nd|rd|=
 |pd|bl|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
| 9. Bxb7
}}
'''9. Bxb7!'''

WThite finds a forceful continuations breaks the slender thread that putsheld Black in dire straits's position together. (White would have answered 8...h6, favored by [[Sam Sloan]], the same way.) Black's best betmove now is to ignore White's bishop and harass White's queen with 9...Bd6, but then White calmly plays 10.Qa5!, maintaining the threat on f5 and forcing Black to lose material.  Then Black's best is 10...Nc6 11.Bxc6 Rb8.  Black has avoided checkmate, but now White has a larhuge material advantage (four extra pawns) and can win slowly and surely with patient developing moves like 12.Nc3, or even snatch a fifth pawn with 12.Qxa7.

<br style="clear:both" />
{{Chess diagram|=
| tright
| 
|=
 |rd|nd|  |qd|  |bd|nd|rd|=
(contracted; show full)
[[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.