MESON Chess Problem Database

Problem Display
PID: 202651 (R2R4/pbk5/2p5/K1p5/2p5/2P5/1Qn5/8 w - - 0 1)

Michlo, Jozsef

Nepszava, 1923

R2R4/pbk5/2p5/K1p5/2p5/2P5/1Qn5/8

#2

5 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Qb8#
    • 1...Bxa8
      • 2.Qb8#
    • 1...Bc8
      • 2.Raxc8#
    • 1...Sa1
      • 2.Qh2#
    • 1...Se1
      • 2.Qh2#
    • 1...Sa3
      • 2.Qh2#
    • 1...Se3
      • 2.Qh2#
    • 1...Sb4
      • 2.Qh2#
    • 1...Sd4
      • 2.Qh2#
    • 1...a6
      • 2.Qb6#
  • Tries
    • 1.Rab8?
      • threat
        • 2.Qxb7#
      • 1...Bc8
        • 2.Rbxc8#
      • 1...Ba8
        • 2.Rbc8#
      • 1...Sb4
        • 2.Qh2#
      • 1...Ba6!
  • Keys
    • 1.Qb1!
      • 1...Bxa8
        • 2.Qb8#
      • 1...Bc8
        • 2.Raxc8#
      • 1...Ba6
        • 2.Qb8#
      • 1...Sa1
        • 2.Qh7#
      • 1...Se1
        • 2.Qh7#
      • 1...Sa3
        • 2.Qh7#
      • 1...Se3
        • 2.Qh7#
      • 1...Sb4
        • 2.Qh7#
      • 1...Sd4
        • 2.Qh7#
      • 1...a6
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 6
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE::QAB1(A)
    • B(f);OGATE,XR(D)::QAB1(A)
    • B(f);N_GUARD::R1(D),XB(f)
    • S(a);OGATE::QAB(A)
    • P(e);N_GUARD::QAB1(A)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAR1(A),XB(f)
      • Vars
        • B(f);N_GUARD::R1(D),XB(f)
        • B(f);N_GUARD::R1(D)
        • S(a);OGATE::QAB(A)
      • Refutation
        • B(f);
  • Actual
    • Q(A);
    • Vars
      • B(f);OGATE,XR(D)::QAB1(A)
      • B(f);N_GUARD::R1(D),XB(f)
      • B(f);OGATE::QAB1(A)
      • S(a);OGATE::QAR(A)
      • P(e);N_GUARD::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).