MESON Chess Problem Database

Problem Display
PID: 83473 (1n3B1R/Qq3kN1/p1n3p1/1B4P1/2R1p3/7p/6b1/1K6 w - - 0 1)

Ellerman, Arnoldo

Good Companions (December), 1916

1n3B1R/Qq3kN1/p1n3p1/1B4P1/2R1p3/7p/6b1/1K6

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qf2#
    • 1...Sb4
      • 2.Be8#
    • 1...e3
      • 2.Rf4#
  • Tries
    • 1.Qxb7+?
      • 1...Se7
        • 2.Be8#
        • 2.Qxe7#
      • 1...Sd7!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Bc4#
      • 1...Sxb4
        • 2.Be8#
      • 1...Sxa7
        • 2.Be8#
      • 1...axb5
        • 2.Qa2#
      • 1...Bf1
        • 2.Qf2#
      • 1...Sd4
        • 2.Be8#
      • 1...Sa5
        • 2.Be8#
      • 1...Se5
        • 2.Be8#
      • 1...Se7
        • 2.Be8#
      • 1...Sd8
        • 2.Be8#
      • 1...e3
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR(E)
    • S(e);N_PINB(C)::B(C)
    • P(c);::R(B)
  • Tries
    • Try
      • Q(E);CHECK,N_SPINB(C),XQ(g)
      • Refutation
        • S(i);P_SPINS(i)
  • Actual
    • R(B);N_SPINB(C)
    • Threat
      • B(C)
    • Vars
      • S(e);OGATE,XR(B)::B(C)
      • S(e);N_SPINQ(g),OGATE,XQ(E)::B(C)
      • P(d);OGATE,XB(C)::QAB(E)
      • B(a);N_GUARD::QAR(E)
      • S(e);OGATE::B(C)
      • S(e);N_SPINQ(g),OGATE::B(C)
      • P(c);OGATE::R(B)
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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).