MESON Chess Problem Database

Problem Display
PID: 52980 (bK3N2/8/3N3B/8/2R2n2/1n1k4/7q/4Q3 w - - 0 1)

Hoffmann, Bruno

Schach-Express, 1950

bK3N2/8/3N3B/8/2R2n2/1n1k4/7q/4Q3

#2

6 + 5

5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qe2
      • 2.Qc3#
    • 1...Sd4
      • 2.Rc3#
    • 1...Se2
      • 2.Qb1#
    • 1...Sg2
      • 2.Qf1#
    • 1...Sh3
      • 2.Qe3#
    • 1...Sd5
      • 2.Qe4#
    • 1...Sh5
      • 2.Qe3#
    • 1...Se6
      • 2.Qe3#
    • 1...Sg6
      • 2.Qe3#
  • Tries
    • 1.Se6?
      • threat
        • 2.Rc3#
      • 1...Sxe6
        • 2.Qe3#
      • 1...Qb2
        • 2.Sxf4#
      • 1...Qc2
        • 2.Sxf4#
      • 1...Sd2
        • 2.Sc5#
      • 1...Se2
        • 2.Qb1#
      • 1...Sd5
        • 2.Qe4#
      • 1...Qd2!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Se5#
      • 1...Sxg6
        • 2.Qe3#
      • 1...Qe2
        • 2.Qc3#
      • 1...Qb2
        • 2.Sxf4#
      • 1...Qh5
        • 2.Sxf4#
      • 1...Se2
        • 2.Qb1#
      • 1...Sg2
        • 2.Qf1#
      • 1...Sh3
        • 2.Qe3#
      • 1...Sd5
        • 2.Qe4#
      • 1...Sh5
        • 2.Qe3#
      • 1...Se6
        • 2.Qe3#

Anticipated by 76498(1945)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);SBLOCK::QAR1(A)
    • S(b);SBLOCK::R1(B)
    • S(d);P_PINS(C),SBLOCK,S_CUTQ(a)::QAB(A)
    • S(d);N_GUARD,P_PINS(C),S_CUTQ(a)::QAB(A)
    • S(d);P_PINS(C)::QAR1(A)
    • S(d);P_PINS(C),S_CUTB(e)::QAB1(A)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(B)
      • Vars
        • S(d);P_PINS(C),XS(F)::QAR1(A)
        • Q(a);N_GUARD::S(F),XS(d)
        • S(b);N_GUARD::S(F)
        • S(d);P_PINS(C),SBLOCK,S_CUTQ(a)::QAB(A)
        • S(d);P_PINS(C),S_CUTB(e)::QAB1(A)
      • Refutation
        • Q(a);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • S(d);P_PINS(C),XS(F)::QAR1(A)
      • Q(a);SBLOCK::QAR1(A)
      • Q(a);N_GUARD::S(F),XS(d)
      • S(d);P_PINS(C),SBLOCK,S_CUTQ(a)::QAB(A)
      • S(d);N_GUARD,P_PINS(C),S_CUTQ(a)::QAB(A)
      • S(d);P_PINS(C)::QAR1(A)
      • S(d);P_PINS(C),S_CUTB(e)::QAB1(A)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).