MESON Chess Problem Database

Problem Display
PID: 239844 (rn4Nq/6Q1/2nPP3/N2k3p/R3RP1b/B1pP1K2/b7/8 w - - 0 1)

Hermanson, Halvar

Themes-64, 1983

rn4Nq/6Q1/2nPP3/N2k3p/R3RP1b/B1pP1K2/b7/8

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc4
      • 2.dxc4#
    • 1...Be1
      • 2.Sf6#
    • 1...Bf2
      • 2.Sf6#
    • 1...Bg3
      • 2.Sf6#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Sd4+
      • 2.Raxd4#
    • 1...Se5+
      • 2.Rxe5#
    • 1...Sa7
      • 2.Rad4#
      • 2.Re5#
    • 1...Se7
      • 2.Rad4#
      • 2.Re5#
    • 1...Sd8
      • 2.Rad4#
      • 2.Re5#
  • Tries
    • 1.Se7+?
      • 1...Sxe7
        • 2.Rad4#
        • 2.Re5#
      • 1...Bxe7!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qb5#
      • 1...Rxa5
        • 2.Rxa5#
      • 1...Qe5
        • 2.Rxe5#
      • 1...Qd4
        • 2.Raxd4#
      • 1...Bc4
        • 2.dxc4#
      • 1...Bf2
        • 2.Se7#
      • 1...Sa6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • B(a);OGATE::P(B),XB(a)
    • B(c);N_GUARD::S(K)
    • B(c);N_GUARD::S(K),XB(c)
    • S(f);CHECK,N_GUARD::R1(D),XS(f)
    • S(f);CHECK,N_GUARD::R1(E),XS(f)
  • Tries
    • Try
      • S(K);CHECK
      • Refutation
        • B(c);XS(K)
  • Actual
    • Q(J);P_PINS(f)
    • Threat
      • QAR2(J)
    • Vars
      • R(g);OGATE,XS(G)::R(D),XR(g)
      • Q(i);N_GUARD::R1(E),XQ(i)
      • Q(i);N_GUARD::R1(D),XQ(i)
      • B(a);OGATE::P(B),XB(a)
      • B(c);N_GUARD::S(K)
      • S(h);N_GUARD::QAB1(J),XS(f)
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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).