MESON Chess Problem Database

Problem Display
PID: 267805 (8/1Kn4b/2BN4/Qpk1B3/p1pp2r1/3Pn3/8/2R1b3 w - - 0 1)

Hermanson, Halvar

diagrammes, 1976

8/1Kn4b/2BN4/Qpk1B3/p1pp2r1/3Pn3/8/2R1b3

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6
      • 2.Se4#
    • 1...Bb4
      • 2.Qb6#
      • 2.Qa7#
    • 1...Sd1
      • 2.Rxc4#
    • 1...Sf1
      • 2.Rxc4#
    • 1...Sg2
      • 2.Rxc4#
    • 1...Sed5
      • 2.Rxc4#
    • 1...Sf5
      • 2.Rxc4#
    • 1...Scd5
      • 2.Qxb5#
    • 1...Sa6
      • 2.Qxb5#
    • 1...Se6
      • 2.Qxb5#
    • 1...Sa8
      • 2.Qxb5#
    • 1...Se8
      • 2.Qxb5#
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Bd6#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Bg3
        • 2.Sxe3#
      • 1...Sf5
        • 2.Sd2#
      • 1...Se8
        • 2.Qxb5#
      • 1...Rg6!
  • Keys
    • 1.Sxb5!
      • threat
        • 2.Bd6#
      • 1...Sxb5
        • 2.Qxb5#
      • 1...Rg6
        • 2.Bxd4#
      • 1...Bg3
        • 2.Sxc7#
      • 1...Sf5
        • 2.Rxc4#
      • 1...Se8
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(f);N_GUARD,S_CUTB(j)::S(F)
    • S(b);N_GUARD::R1(A),XP(d)
    • S(i);N_GUARD::QAR1(C),XP(g)
  • Tries
    • Try
      • S(F);P_PINP(g),XP(d)
      • Threat
        • B(D)
      • Vars
        • S(b);OGATE,P_SPINS(b),XS(F)::R1(A),XS(b)
        • B(a);N_GUARD::R(A)+S(F),XS(b)
        • S(b);N_GUARD::R(A)+S(F)
        • S(i);N_GUARD::QAR1(C),XP(g)
      • Refutation
        • R(f);
  • Actual
    • S(F);XP(g)
    • Threat
      • B(D)
    • Vars
      • S(i);OGATE,P_SPINS(i),XS(F)::QAR1(C),XS(i)
      • R(f);N_GUARD::B(D),XP(e)
      • B(a);N_GUARD::QAR(C)+S(F),XS(i)
      • S(b);N_GUARD::R1(A),XP(d)
      • S(i);N_GUARD::QAR(C)+S(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).