If a rook or queen is pinned along a file, or a bishop or queen is pinned along a diagonal, the pin is a partial pin: the pinned unit can still move along its line but cannot leave that line.

If the rook on d3 moves to d5, it is possible to disambiguate with either Rdd5 or R3d5.

* If only the rook needs to move ( jumping over the king ), only move the rook.

* If only the king needs to move ( jumping over the castling rook ), only move the king.

If 31 ... Rxc7 the rook is overloaded, having to look after both the key squares: 32. Qb7 + Rxb7 and the rook is deflected from defence of c5, allowing 33. Rxc5 #.

( If White moves the queen to another square, Black's knight captures White's rook on f3, winning the exchange.

As the white rook on f1 is tied to the defense of the pawn on f3, Black won immediately with 1 ... Re1, overloading the rook: If 2.

< li style =" margin-left: 16em ;"> If a player moves his queen, rook, bishop, or knight, then he must move an enemy pawn .</ li >

If the backward pawn is on a half-open file, as in this case, the disadvantage is even greater, as the pawn can be attacked more easily by an opponent's rook or queen on the c-file.

If White tries 9. g3 then the fork 9 ... Qe4 + wins the rook on h1.

If Black fails to react energetically to the Stonewall setup, White may launch a lethal attack on the Black king, typically by playing the knight from f3 to e5, advancing the g-pawn to drive away the defending black knight, and making a well timed bishop sacrifice at h7 ( see Greek gift sacrifice ) when White can bring one of the major pieces ( queen and / or rook ) to the h-file.

If the circumstances are faced frankly it is not reasonable to expect this to be true.

If his dancers are sometimes made to look as if they might be creatures from Mars, this is consistent with his intention of placing them in the orbit of another world, a world in which they are freed of their pedestrian identities.

If a work is divided into several large segments, a last-minute drawing of random numbers may determine the order of the segments for any particular performance.

If they avoid the use of the pungent, outlawed four-letter word it is because it is taboo ; ;

If Wilhelm Reich is the Moses who has led them out of the Egypt of sexual slavery, Dylan Thomas is the poet who offers them the Dionysian dialectic of justification for their indulgence in liquor, marijuana, sex, and jazz.

If he is the child of nothingness, if he is the predestined victim of an age of atomic wars, then he will consult only his own organic needs and go beyond good and evil.

If it is an honest feeling, then why should she not yield to it??

If he thus achieves a lyrical, dreamlike, drugged intensity, he pays the price for his indulgence by producing work -- Allen Ginsberg's `` Howl '' is a striking example of this tendency -- that is disoriented, Dionysian but without depth and without Apollonian control.

If love reflects the nature of man, as Ortega Y Gasset believes, if the person in love betrays decisively what he is by his behavior in love, then the writers of the beat generation are creating a new literary genre.

If he is good, he may not be legal ; ;

If the man on the sidewalk is surprised at this question, it has served as an exclamation.

If the existent form is to be retained new factors that reinforce it must be introduced into the situation.

If we remove ourselves for a moment from our time and our infatuation with mental disease, isn't there something absurd about a hero in a novel who is defeated by his infantile neurosis??

If many of the characters in contemporary novels appear to be the bloodless relations of characters in a case history it is because the novelist is often forgetful today that those things that we call character manifest themselves in surface behavior, that the ego is still the executive agency of personality, and that all we know of personality must be discerned through the ego.

If he is a traditionalist, he is an eclectic traditionalist.

If our sincerity is granted, and it is granted, the discrepancy can only be explained by the fact that we have come to believe hearsay and legend about ourselves in preference to an understanding gained by earnest self-examination.

If to be innocent is to be helpless, then I had been -- as are we all -- helpless at the start.

If the Pope was unmoved, the king was characteristically obstinate.

If any of us miss, they can pick up the pieces.

`` If you can conveniently let me have twenty dollars '', he wrote one friend in 1791 when he was Secretary of the Treasury.

If we cannot stop warfare in our own economic system, how can we expect to abolish it internationally??

If Mrs. Wright doesn't accept the terms in the morning, I'll go either to Tokyo or to Holland, to do what I can.

If within one year you can make a success out of the American, you can practically name your own salary thereafter.

If it is not one of his best books, it can only be considered unsatisfactory when compared with his own Garibaldi.

If there be a disinterested patriot in America, 'tis General Washington, and his bravery, none can question ''.

`` If you can firmly make the good knight sure to pleasure our Corporation '', Sturley wrote, `` besides that ordinary allowance for your diet you shall have 20 for recompence ''.

If man is actually the product of his environment and if science can discover the laws of human nature and the ways in which environment determines what people do, then someone -- a someone probably standing outside traditional systems of values -- can turn around and develop completely efficient means for controlling people.

If the manner of his passing moves the nations to act in the spirit of his dedication the sore issues that plague the world can yet be resolved with reason and justice.

If they do as well as they did in 1960 there can be no complaint.

If he can bounce back with one of those 25 home runs years, the club will have to be better off offensively.

If it will simply delay the debates until the qualifications are closed next spring, and then carry all the candidates on a tour of debates, it can provide a service to the state.

`` If the day should ever come that foreign invaders swarm ashore along the Gulf Coast '', the account reads, `` they can count on heavy opposition from a group of commando-trained telephone employees -- all girls.

If we cluster together, the redcoats can make an advantage out of it, but there's not a blessed thing they can do with two or three of us except chase us, and we can outrun them ''.

If there is anything which we can do in the executive branch of the Government to speed up the processes by which we come to decisions on matters on which we must act promptly, that in itself would be a major contribution to the conduct of our affairs.

If the target can change its position significantly during the 30 minutes the missile is in the air on its way, the probability of the missile destroying the target is drastically reduced.

If your state has no provisions for the numbering of pleasure boats, you must apply for a number from the U.S. Coast Guard for any kind of boat with mechanical propulsion rated at more than 10 horsepower before it can be used on Federal waterways.

If there are any major restrictions, they usually can be obtained in printed form.

Note: If 1/2-inch panel board is used inside and out, or 5/8-inch one side and 3/8-inch the other, and 1/8-inch glass is used, stock lumber in Af, Af, and Af can be used in making the glass panels.