KEARSE, Circuit Judge:
The issue presented for our en banc consideration in this appeal concerns the standard for determining whether state remedies have been exhausted so as to permit federal habeas corpus review of a state court conviction. Appellant William Daye, a New York state prisoner, filed a petition for a writ of habeas corpus in the United States District Court for the Southern District of New York, Milton Pollack, Judge, contending principally that, in his state trial for murder and robbery, he had been denied a fair trial in violation of his federal constitutional rights. The district court ruled that Daye had exhausted his state remedies, but dismissed the petition for lack of merit. Daye appealed the dismissal of his fair trial claim,1 and a divided panel of this Court, without reaching the merits, affirmed on the ground that Daye had failed to exhaust his state remedies. 663 F.2d 1155 (2d Cir.1981). On en banc reconsideration, we conclude that Daye had exhausted his state remedies. We therefore vacate the decision of the panel and return the matter to the panel for consideration of the merits.
I. BACKGROUND
Daye was convicted in New York Supreme Court in June 1976 of felony murder, intentional murder, and two counts of first degree robbery. The events leading to his conviction are set forth in detail in the opinions of the panel, 663 F.2d 1155, familiarity with which is assumed. In brief, the state presented evidence at trial that on March 19, 1974, Daye robbed patrons and employees of a restaurant, shot and mortally wounded the restaurant’s cook, attempted unsuccessfully to shoot others in the restaurant, and fled. Daye was followed by one of his victims to a building two blocks away, and was soon apprehended there by police as he was trying to climb down a drainpipe. Daye’s defense was that he had been a victim of the robbery rather than its perpetrator, and that he had fled the restaurant because he had a prior arrest record and was afraid he would be accused of the robbery.
Daye appealed his conviction to the Appellate Division of the Supreme Court, complaining principally that the trial judge had “assumed an obviously hostile and prosecutorial stance towards the defendant,” [189]*189(Daye’s brief to Appellate Division at 24), participated in the examination of the witnesses in a manner that tended to “aid and bolster the prosecution’s case,” (id. at 9), and conveyed to the jury the impression that he believed Daye was guilty, (id. at 14, 24, 34). Citing and quoting numerous portions of the trial transcript to support these assertions, Daye pointed out that “the Bench must be scrupulously free from and above even the appearance or taint of partiality, People v. DeJesus, 42 N.Y.2d 519, 523, 399 N.Y.S.2d 196, 199 [, 369 N.E.2d 752, 755] (1977).” (Id. at 8.) He argued that the trial court had instead “set impartiality aside in favor of the prosecution,” (id.), thereby depriving him of his “cardinal” and “fundamental” “right to a fair trial,” (id. at 34). In so arguing, Daye did not mention the Constitution or cite any federal cases. The Appellate Division affirmed Daye’s conviction without opinion, People v. Daye, 72 A.D.2d 669, 421 N.Y.S.2d 955 (1979), and leave to appeal to the New York Court of Appeals was denied.
Daye then commenced the present proceeding by filing a petition for a writ of habeas corpus in the district court.2 Again relying on his contentions that the trial judge, by his interrogation of witnesses and his manner of addressing defense counsel, had exhibited partisanship, Daye argued that he had been denied his right to a fair trial under the Fifth, Sixth, and Fourteenth Amendments to the Constitution. The state opposed the petition not only on its merits, but also on the ground that Daye had not presented his claim to the state courts in constitutional terms and thus had failed to exhaust his state remedies. Judge Pollack noted that the state court appeal had been prosecuted in terms of the denial of a “fair trial,” and he concluded, citing Twitty v. Smith, 614 F.2d 325, 332 (2d Cir.1979), that even without explicit citation of the Constitution or federal cases, Daye’s presentation had been sufficient to alert the state courts that Daye claimed deprivation of his right to a fair and impartial trial under the Sixth and Fourteenth Amendments. Reaching the merits, Judge Pollack dismissed Daye’s petition because he concluded that the trial judge’s conduct had not deprived Daye of a fair trial. This appeal followed.
A. Decision of the Panel
On Daye’s appeal the state pursued its contention that Daye had failed to exhaust his state court remedies, and a majority of the panel concluded that Johnson v. Metz, 609 F.2d 1052 (2d Cir.1979), compelled a" ruling that there had been no exhaustion. Writing for the majority, Judge Newman stated as follows:
This Court has frequently ruled that the exhaustion requirement is not satisfied unless the habeas petitioner explicitly refers to a federal constitutional standard in presenting his claim to the state courts. Wilson v. Fogg, 571 F.2d 91 (2d Cir.1978); Cameron v. Fastoff, 543 F.2d 971 (2d Cir.1976); United States ex rel. Gibbs v. Zelker, 496 F.2d 991 (2d Cir.1974). We have especially emphasized the importance of identifying a claim as a federal constitutional claim when challenging the conduct of a state court trial judge. Fielding v. LeFevre, 548 F.2d 1102 (2d Cir.1977); United States ex rel. Nelson v. Zelker, 465 F.2d 1121 (2d Cir.), cert. denied, 409 U.S. 1045, 93 S.Ct. 544, 34 L.Ed.2d 497 (1972).
Just two years ago we applied this strict approach to exhaustion to a habeas corpus petition indistinguishable from Daye’s. Johnson v. Metz, 609 F.2d 1052 (2d Cir.1979). Like Daye, Johnson sought habeas corpus relief because of the excessive and prejudicial intervention of the state court trial judge, and, like Daye, his state court briefs, which made no express mention of the Sixth or Fourteenth Amendments, referred to the denial of a fair and impartial trial and characterized a fair trial as a fundamental element of the judicial process. Though the District Court in Johnson had concluded that the [190]*190exhaustion requirement had been met and that the petitioner was entitled to relief on the merits, this Court reversed, ruling that Johnson had not presented a federal constitutional claim to the state courts. Even though Johnson’s brief in the Appellate Division cited ten decisions of federal courts, his fair trial claim was deemed to be an appeal only to state law or to the supervisory power of the state appellate courts, and thus not the “same claim,” Picard v. Connor, 404 U.S. 270, 276, 92 S.Ct. 509, 512, 30 L.Ed.2d 438 (1971), that he was presenting to the federal courts. Johnson v. Metz, supra, 609 F.2d at 1054.
663 F.2d at 1156-57; see id. at 1158 (Metzner, J., concurring). Thus, although the majority in the present case saw
[little] reason to believe that the articulation of facts (here, excessive and prejudicial court questioning) and consequence (here, denial of a fair and impartial trial) are inadequate to afford state courts, fully aware of their constitutional responsibilities, a fair opportunity to decide whether a conviction accords with constitutional requirements,
id. at 1157 (Newman, J.); see id. at 1158 (Metzner, J., concurring), it felt constrained on the basis of Johnson to rule that there had been no exhaustion because Daye’s state argument had not explicitly referred to federal constitutional standards. Accordingly, the panel affirmed the dismissal of Daye’s petition, without prejudice to his commencing a new habeas proceeding after the exhaustion of state court remedies.
Judge Lumbard, in dissent, concluded that the exhaustion requirement had been satisfied because Daye’s state appellate brief had “repeatedly argued that the trial judge’s questioning ‘deprived the defendant of his right to a fair trial,’ ” and “[t]he New York courts have recognized that this right rests on constitutional and not merely state law grounds .... ” Id. at 1160. Judge Lumbard found Johnson v. Metz distinguishable because Daye, unlike the petitioners in Johnson, had relied on New York authorities, e.g., People v. DeJesus, supra, that themselves relied on United States Supreme Court cases in support of the principle that there is a fundamental, constitutional right to a fair trial untainted by judicial partiality.
In light of the importance of having a consistent and workable standard by which the courts of the Circuit may judge whether or not state court remedies have been exhausted, a majority of the active judges of the Court voted for en banc rehearing of the panel’s decision, limited to the question of exhaustion. We directed the parties to file additional briefs on this issue and invited them to address the question whether Johnson v. Metz should be overruled.
II. DISCUSSION
A. Exhaustion in General
The federal habeas corpus statute, 28 U.S.C. §§ 2254(b) and (c), embodies the long-established principle that a state prisoner seeking federal habeas review of his conviction ordinarily must first exhaust available state remedies.3 See Picard v. [191]*191Connor, 404 U.S. 270, 275, 92 S.Ct. 509, 512, 30 L.Ed.2d 438 (1971); Nelson v. George, 399 U.S. 224, 229, 90 S.Ct. 1963, 1966, 26 L.Ed.2d 578 (1970); Irvin v. Dowd, 359 U.S. 394, 404-05, 79 S.Ct. 825, 831-32, 3 L.Ed.2d 900 (1959); Ex parte Hawk, 321 U.S. 114, 64 S.Ct. 448, 88 L.Ed. 572 (1944); Ex parte Royall, 117 U.S. 241, 6 S.Ct. 734, 29 L.Ed. 868 (1886). In general, the exhaustion doctrine provides that a habeas petitioner seeking to upset his state conviction on federal grounds must first have given the state courts a fair opportunity to pass upon his federal claim. Picard v. Connor, supra, 404 U.S. at 275, 92 S.Ct. at 512; Wilwording v. Swenson, 404 U.S. 249, 92 S.Ct. 407, 30 L.Ed.2d 418 (1971) (per curiam).
The exhaustion requirement springs primarily from considerations of comity. The writ of habeas corpus is designed to provide an efficacious remedy for imprisonment in violation of federal law. See, e.g., Braden v. 30th Judicial Circuit Court, 410 U.S. 484, 93 S.Ct. 1123, 35 L.Ed.2d 443 (1973). The exhaustion doctrine recognizes that state courts, no less than federal courts, are bound to safeguard the federal rights of state criminal defendants. See Irvin v. Dowd, supra, 359 U.S. at 404, 79 S.Ct. 825 at 831, 3 L.Ed.2d 900 (1959); Ex parte Royall, supra, 117 U.S. at 251, 6 S.Ct. at 740. The requirement that federal courts not exercise habeas review of a state conviction unless the state courts have had an opportunity to consider and correct any violation of federal law expresses respect for our dual judicial system and concern for harmonious relations between the two adjudicatory institutions. See Rose v. Lundy, 455 U.S. 509, 102 S.Ct. 1198, 71 L.Ed.2d 379 (1982); Duck-worth v. Serrano, 454 U.S. 1, 102 S.Ct. 18, 70 L.Ed.2d 1 (1981) (per curiam); Picard v. Connor, supra, 404 U.S. at 275, 92 S.Ct. at 512; Darr v. Burford, 339 U.S. 200, 204, 70 S.Ct. 587, 590, 94 L.Ed. 761 (1950); Developments in the Law—Federal Habeas Corpus, 83 Harv.L.Rev. 1038, 1093-94 (1970). In addition to “minimizing] friction between our federal and state systems of justice,” Duckworth v. Serrano, supra, 454 U.S. at 3, 102 S.Ct. at 19, adherence to the exhaustion requirement has the salutary practical effects of enhancing the familiarity of state courts with federal doctrines, Rose v. Lundy, supra, 102 S.Ct. at 1203; Braden v. 30th Judicial Circuit Court, supra, 410 U.S. at 490-91, 93 S.Ct. at 1127-28, and of increasing the likelihood that the factual allegations necessary to a resolution of the claim will have been fully developed in state court, making federal habeas review more expeditious, Rose v. Lundy, supra, 102 S.Ct. at 1203-04.
The exhaustion requirement is not satisfied unless the federal claim has been “fairly presented” to the state courts. Wilwording v. Swenson, supra; see also Brown v. Allen, 344 U.S. 443, 447-50, 73 S.Ct. 397, 402-404, 97 L.Ed.2d 469 (1953). In order to have fairly presented his federal claim to the state courts the petitioner must have informed the state court of both the factual and the legal premises of the claim he asserts in federal court. See, e.g., Picard v. Connor, supra, 404 U.S. at 276-77, 92 S.Ct. at 512-13; Twitty v. Smith, supra, 614 F.2d at 331. Specifically, he must have set forth in state court all of the essential factual allegations asserted in his federal petition; if material • factual allegations were omitted, the state court has not had a fair opportunity to rule on the claim. See, e.g., Picard v. Connor, supra, 404 U.S. at 276, 92 [192]*192S.Ct. at 512; United States ex rel. Cleveland v. Casscles, 479 F.2d 15, 19-20 (2d Cir.1973); United States ex rel. Rogers v. La Vallee, 463 F.2d 185 (2d Cir.1972); United States ex rel. Boodie v. Herold, 349 F.2d 372, 374 (2d Cir.1965).
Likewise, the petitioner must have placed before the state court essentially the same legal doctrine he asserts in his federal petition. See, e.g., Picard v. Connor, supra; Callahan v. Le Fevre, 605 F.2d 70, 72 (2d Cir.1979); Wilson v. Fogg, 571 F.2d 91, 92-93 (2d Cir.1978); Fielding v. Le Fevre, 548 F.2d 1102, 1107 (2d Cir.1977). The chief purposes of the exhaustion doctrine would be frustrated if the federal habeas court were to rule on a claim whose fundamental legal basis was substantially different from that asserted in state court.4
B. Presentation of Legal Basis
The difficult question in many cases, including the present one, is whether the legal doctrines asserted in state and federal courts are substantially the same. Obviously if the petitioner has cited the state courts to the specific provision of the Constitution relied on in his habeas petition, he will have fairly presented his legal basis to the state courts. A defendant may, however, fairly present the substance of a federal constitutional claim to the state court without citing “ ‘book and verse on the federal constitution.’ ” Picard v. Connor, supra, 404 U.S. at 278, 92 S.Ct. at 513 (quoting Daugharty v. Gladden, 257 F.2d 750, 758 (9th Cir.1958)). The requirement that the state court have been given a reasonable opportunity to pass on the federal habeas claim is satisfied if the legal basis of the claim made in state court was the “substantial equivalent” of that of the habeas claim. Picard v. Connor, supra, 404 U.S. at 278, 92 S.Ct. at 513; see also Ulster County Court v. Allen, 442 U.S. 140, 147-48 n.5, 99 S.Ct. 2213, 2217-20 n.5, 60 L.Ed.2d 777 (1979); Callahan v. Le Fevre, supra, 605 F.2d at 73-74; Fielding v. Le Fevre, supra, 548 F.2d at 1107; United States ex rel. Gibbs v. Zelker, 496 F.2d 991, 993-94 (2d Cir.1974). This means, in essence, that in state court the nature or presentation of the claim must have been likely to alert the court to the claim’s federal nature.
The courts may be alerted to the constitutional nature of a claim in a number of ways. Even absent a reference to “book and verse” of the Constitution the state court will have notice of the constitutional nature of a claim if, for example, the defendant relies on federal constitutional precedents.5 See, e.g., United States ex rel. [193]*193Gibbs v. Zelker, supra, 496 F.2d at 994 (intimating that a citation to Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966), would have alerted state court to the constitutional thrust of defendant’s claim). Alternatively, the state court will be alerted to the constitutional nature of a claim if the defendant has claimed the deprivation of a particular right specifically protected by the Constitution. In Twitty v. Smith, supra, for example, the petitioner had claimed a violation of his right to “effective assistance of counsel.” 614 F.2d at 332. We held this adequate to alert the state court to consider the Sixth Amendment’s guaranty of the accused’s right “to have the Assistance of Counsel for his defence.”
The more specific the description of the right in question — e.g., assistance of counsel, double jeopardy, self-incrimination — the more easily alerted a court will be to consider a constitutional constraint couched in similarly specific terms.6 The greatest difficulty arises when in the state court the petitioner has described his claim in very broad terms, such as denial of a “fair trial.” The concept of fairness embraces many concrete notions, ranging from such fundamental matters as the right of the defendant to know the charges against him, to such lesser interests as his right to have each count of the indictment charge him with no more than one criminal violation, United States v. Gibson, 310 F.2d 79, 80 n.1 (2d Cir.1962); Fed.R.Crim.P. 8(a); or the right to have access to reports by informant witnesses to law enforcement officials, United States v. Sanchez, 635 F.2d 47, 65-66 (2d Cir.1980); or the right to present information in mitigation of punishment before being sentenced after conviction, Fed.R.Crim.P. 32(a). Obviously not every event in a criminal proceeding that might be described as “unfair” would be a violation of the defendant’s rights under the Constitution. See, e.g., Kirksey v. Jones, 673 F.2d 58, 60 (2d Cir.1982) (“Alleging lack of a fair trial does not convert every complaint about evidence or a prosecutor’s summation into a federal due process claim.”). In order to determine, therefore, whether a claim that the defendant has been denied a “fair trial” involves a constitutional claim, one must look to the factual allegations supporting the claim. Some will be of patently constitutional dimension. If the defendant claimed that he was accused of one crime but convicted of an entirely different crime and hence was denied a fair trial, no reasonable jurist would doubt that the defendant’s claim implicated his constitutional right to due process of law. In contrast, a defendant’s claim that he was deprived of a fair trial because of the admission in evidence of a statement objectionable as hearsay would not put the court on notice that the defendant claimed a violation of his constitutional right to be confronted by his accusers.
The general principle governing assessment of whether a fair trial claim is of constitutional dimension is that where the claim rests on a factual matrix that is “well within the mainstream of due process adjudication,” Johnson v. Metz, supra, 609 F.2d at 1057 (Newman, J., concurring); see also id. at 1056 n.5 (opinion of the Court), the state courts must be considered to have been fairly alerted to its constitutional nature. If, on the other hand, the claim is based on a fact pattern not theretofore commonly thought to involve constitutional constraints, there is usually little reason to believe the courts were alerted to its supposed constitutional nature.
[194]*194In addition, however, even if a particular matter is not treated generally as having constitutional dimension, if the courts of the state in question have themselves previously treated that fact pattern as appropriate for constitutional analysis, it would be unreasonable to suppose that they are not alert to constitutional considerations. Thus we consider that a defendant who cites state precedent that employs pertinent constitutional analysis has adequately put the state courts on notice of the constitutional thrust of his claim.7
In summary, the ways in which a state defendant may fairly present to the state courts the constitutional nature of his claim, even without citing chapter and verse of the Constitution, include (a) reliance on pertinent federal cases employing constitutional analysis, (b) reliance on state cases employing constitutional analysis in like fact situations, (c) assertion of the claim in terms so particular as to call to mind a specific right protected by the Constitution, and (d) allegation of a pattern of facts that is well within the mainstream of constitutional litigation. In all such circumstances the federal habeas court should assume that the state courts, which are obliged, “ ‘equally with the courts of the Union, ... to guard, enforce, and protect every right granted or secured by the Constitution of the United States,’ ” Irvin v. Dowd, supra, 359 U.S. at 404, 79 S.Ct. at 831 (quoting Robb v. Connolly, 111 U.S. 624, 637, 4 S.Ct. 544, 551, 28 L.Ed. 542 (1884)), have been alerted to consider, and have considered, the constitutional claim. To eschew that assumption is surely to disserve the interests of comity and the respect due the diligent jurists on the state bench.8
[195]*195We do not view Johnson v. Metz, supra, as inconsistent with this framework for assessment of exhaustion. Although subsequent panels have construed language in Johnson as imposing a requirement that the constitutional claim have been plainly labeled as such to the state court, see, e.g., Klein v. Harris, 667 F.2d 274 (2d Cir.1981); Gayle v. Le Fevre, 613 F.2d 21, 22-23 (2d Cir.1980), the analytical process followed by Johnson does not support this view. The Johnson panel did not rely merely on the fact that the petitioners had not expressly described their claim as one arising under the Constitution. Rather, it examined the cases cited by the petitioners to determine whether those cases in turn referred to constitutional doctrines. Finding that the cases cited were either state cases resting on state law or on state supervisory power or federal cases resting on federal court supervisory power, the panel concluded that the federal constitutional claim asserted in the habeas petition had not been fairly presented to the state courts. Thus, we regard Johnson as having recognized that explicit labeling is not a sine qua non of exhaustion, and that the invocation of state cases employing constitutional analysis would have sufficed to alert the state courts to the constitutional nature of the claim.
Nor do we read the Johnson majority as having rejected the general proposition discussed in Judge Newman’s concurring opinion, 609 F.2d at 1057, and which we accept here, that a state court is alerted to the constitutional nature of a claim if its fact pattern brings it within the mainstream of due process litigation. Rather, the majority seemed uncertain that the Johnson petitioners’ claim actually fell within that category. See id. at 1056 n.5. It is with Johnson’s assessment of the applicability of the “mainstream” criterion that we have difficulty. See part C infra.
C. Daye’s Presentation
In the present case, we conclude that Daye exhausted his state remedies under two of the criteria articulated above. First, his Appellate Division brief relied on two state cases in which New York’s highest court had analyzed similar contentions in constitutional terms. Second, Daye’s repeated challenge to the trial judge’s alleged partiality or open display of partiality served to place his claim within the ambit of a long line of cases establishing a defendant’s constitutional right to a trial before an unbiased judge.
1. Constitutional Treatment by the State Courts
The pertinent state cases relied on by Daye in his state appeal were People v. De Jesus, supra, 42 N.Y.2d 519, 399 N.Y.S.2d 196, 369 N.E.2d 752, and People v. Crimmins, 36 N.Y.2d 230, 367 N.Y.S.2d 213, 326 N.E.2d 787 (1975). Daye cited De Jesus for the proposition that “the Bench must be scrupulously free from and above even the appearance or taint of partiality.” (Daye’s brief to Appellate Division at 8.) In De Jesus, the New York Court of Appeals described the issue before it — whether the excessive intervention of the trial judge deprived the defendant of a fair trial — in clearly constitutional terms, quoting and citing federal constitutional cases:
“It is ‘the law of the land’ that no man’s life, liberty or property be forfeited as a punishment until there has been a charge fairly made and fairly tried in a public tribunal” (Matter of Oliver, 333 U.S. 257, 278 [, 68 S.Ct. 499, 510, 92 L.Ed. 682]). Such a right constitutes the most fundamental of all freedoms (Estes v. Texas, 381 U.S. 532, 540 [85 S.Ct. 1628, 1631, 14 [196]*196L.Ed.2d 543]). The underlying issue here is whether defendant ... was deprived of such a .trial.
42 N.Y.2d at 520, 399 N.Y.S.2d 196, 369 N.E.2d 752. In concluding that the intervention of the trial judge had denied the defendant “ ‘a fair and impartial trial before an unbiased court and an unprejudiced jury,’ ” id. at 523, 399 N.Y.S.2d 196, 369 N.E.2d 752 (quoting People v. McLaughlin, 150 N.Y. 365, 375, 44 N.E. 1017 (1896)), the court adverted not only to state cases but as well to Sheppard v. Maxwell, 384 U.S. 333, 350-51, 86 S.Ct. 1507, 1515-16, 16 L.Ed.2d 600 (1966), and Turner v. Louisiana, 379 U.S. 466, 472, 85 S.Ct. 546, 549, 13 L.Ed.2d 424 (1965), cases affirming the right, guaranteed by the Due Process Clause of the federal Constitution, to a fair trial.
Daye quoted People v. Crimmins for the proposition that his right to a fair trial was so fundamental that its denial precluded invocation of any sort of “harmless error” analysis. In Crimmins, the New York Court of Appeals introduced the portion of its harmless error discussion that was quoted by Daye with the following observation:
[0]ur discussion of the effect to be given constitutional error should not overlook a parallel, and in some instances an overlapping doctrine, also of constitutional proportion, namely, the right to a fair trial.
36 N.Y.2d at 237-38, 367 N.Y.S.2d 213, 326 N.E.2d 787.
The discussions in Crimmins and De Jesus, therefore, show that the New York courts view a defendant’s right to a fair trial as one of constitutional dimension, and view a claim of excessive and biased judicial intervention in the trial as implicating that right to a fair trial. We conclude that Daye’s citations of those two cases in the context of his factual assertions were sufficient to give the state courts notice that he asserted a constitutional claim.
We note in passing that Crimmins and De Jesus (as well as People v. Mees, 47 N.Y.2d 997, 420 N.Y.S.2d 214, 394 N.E.2d 283 (1979), which further confirms the constitutional thrust of Crimmins and De Jesus) were decided after the defendants’ state appeal in Johnson v. Metz. Obviously these New York cases were not cited in the Johnson state appeals. Further, although both Crimmins and De Jesus had been decided before Johnson was argued to our Court and Mees was decided several months before the Johnson decision was rendered, they apparently were not called to our attention. The Johnson panel stated
We have been cited to no case, nor have we found any, in which the intervention of a trial judge in the conduct of trial has been found so prejudicial as to amount to a violation of constitutional due process.
609 F.2d at 1056.
2. The Mainstream of Due Process Adjudication
In addition, we conclude that Daye satisfied the exhaustion requirement because the contention that the trial judge’s evident partiality and his assumption of a hostile and prosecutorial stance deprived Daye of a fair trial was sufficient to alert the state court that a federal due process claim was being asserted. Under the Due Process Clause there is a well developed right, established in a long line of cases, to a trial before an unbiased judge. The fundamental nature of this right is demonstrated by the fact that not even the appearance of bias is tolerated. “Fairness of course requires an absence of actual bias in the trial of cases. But our system of law has always endeavored to prevent even the probability of unfairness.... ‘[Jjustice must satisfy the appearance of justice.’ ” In re Murchison, 349 U.S. 133, 136, 75 S.Ct. 623, 625, 99 L.Ed. 942 (1955) (quoting Offutt v. United States, 348 U.S. 11, 14, 75 S.Ct. 11, 13, 99 L.Ed. 11 (1954)). This principle is reflected in a long line of cases, involving a variety of circumstances bespeaking the real or apparent bias of the trial judge. E.g., Taylor v. Hayes, 418 U.S. 488, 501, 94 S.Ct. 2697, 2704, 41 L.Ed.2d 897 (1974); Ward v. Village of Monroeville, 409 U.S. 57, 59-60, 93 S.Ct. 80, 82-83, 34 L.Ed.2d 267 (1972); Mayberry v. Pennsylvania, 400 U.S. 455, 91 S.Ct. 499, 27 L.Ed.2d 532 (1971); In re Oliver, 333 U.S. 257, 278, 68 S.Ct. 499, 510, 92 L.Ed. 682 [197]*197(1948); Tumey v. Ohio, 273 U.S. 510, 523, 534, 47 S.Ct. 437, 441, 445, 71 L.Ed. 749 (1927). In Murchison and Oliver, the risk of bias inhered in the fact that the trial judge was the person who had brought the charges. In Taylor and Mayberry, the potential bias came from the fact that the judge presided over a trial adjudicating allegedly contemptuous behavior toward himself. And in Ward and Tumey, the appearance of potential bias was reflected in the fact that any fine or costs payable by the defendant upon conviction were to be paid to the judge.
We regard it as immaterial that none of these cases dealt with a bias manifested through allegedly excessive and one-sided intervention in the trial. The gravamen of a claim of denial of a fair trial due to judicial bias does not depend on the source of the bias or the manner of its manifestation. If judicial bias, or the appearance of it, existed, due process was denied. We do not believe it reasonable to assume that state judges presented with a claim of manifested judicial bias would fail to recognize the implication of due process rights simply because half a century of due process cases dealt with the mere risk of bias or with actual bias manifested in other ways.
Thus, to the extent that Johnson v. Metz actually construed Johnson’s claim as one of bias (i.e., denial of an “impartial” trial, see 609 F.2d at 1054), rather than one simply complaining of “the overall conduct of the trial judge,” id., or simply complaining of “intervention,” id. at 1056, we disagree with its conclusion that the claim as one with constitutional thrust was “novel,” and with' its decision to “giv[e] the state court the first opportunity to pass on whether or not the novel constitutional point is ‘within the mainstream of due process adjudication,’ ” id. n. 5.
In the present case there can be little doubt that Daye asserted his fair trial claim in terms of the alleged bias displayed by the trial judge. Having started from the basic doctrine that the judge must “be scrupulously free from and above even the appearance or taint of partiality,” (Daye’s brief to Appellate Division at 8), Daye proceeded to assert, inter alia, that “[throughout the trial the Court set impartiality aside in favor of the prosecution,” (id.); that the court “assume[d] the role of prosecutor” and thereby “demonstrated to the jury that the Trial Judge believed the defendant to be guilty,” (id. at 14); that the trial judge demonstrated an “inability to remain ‘impartial and dispassionate and not appear as an advocate,’ ” (id. at 20); and that the court “blatantly and repeatedly indicated its disbelief in the defendant’s testimony ... and assumed an obviously hostile and prosecutorial stance towards the defendant,” (id. at 24). We conclude that the state courts were alerted to Daye’s complaint that he had been deprived of a trial before an unbiased judge and unprejudiced jury, and we cannot assume that those courts did not recognize the constitutional implications of such a claim.
CONCLUSION
The decision of the panel is vacated, and the appeal is remanded to the panel for consideration of the merits.