MESON Chess Problem Database

Problem Display
PID: 36417 (5r2/2PR1N2/R3Nkr1/3K2p1/1p4P1/1pq5/1B2p3/8 w - - 0 1)

Hermanson, Halvar

Recomm., BCF 007. Ty., 1931-1932

5r2/2PR1N2/R3Nkr1/3K2p1/1p4P1/1pq5/1B2p3/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4+
      • 2.Bxd4#
    • 1...Qe5+
      • 2.Bxe5#
    • 1...Rg7
      • 2.Sf4#
      • 2.Sc5#
      • 2.Sexg5#
      • 2.Sed8#
      • 2.Sxf8#
    • 1...Rd8
      • 2.cxd8Q#
      • 2.cxd8B#
  • Tries
    • 1.Sd4+?
      • 1...Qc6+
        • 2.Sxc6#
      • 1...Kg7!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sc5#
      • 1...Qd2+
        • 2.Sd4#
      • 1...Qd4+
        • 2.Sxd4#
      • 1...Qxe5+
        • 2.Bxe5#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Qf3+
        • 2.Sxf3#
      • 1...Qc4+
        • 2.Sxc4#
      • 1...Qc5+
        • 2.Sxc5#
      • 1...Qc6+
        • 2.Sxc6#
      • 1...Qxc7
        • 2.Sxc7#
      • 1...Rf7
        • 2.Rxf7#
      • 1...Ra8
        • 2.Rf7#
      • 1...Rb8
        • 2.Rf7#
      • 1...Re8
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,OGATE::B(A),XQ(c)
    • R(h);OGATE,P_PINR(G)::PXR(h)=Q
  • Tries
    • Try
      • S(E);CHECK,N_PINQ(c)
      • Vars
        • Q(c);CHECK,P_SPINQ(c)::B(A)+S(E),XQ(c)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • S(H);N_PINQ(c)
    • Threat
      • R(D)+S(E)
    • Vars
      • Q(c);CHECK,N_GUARD::R(D)+S(E)
      • Q(c);CHECK,N_GUARD::R(D)+S(E),XQ(c)
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(H)::B(A),XQ(c)
      • Q(c);CHECK::B(A)+S(H),XQ(c)
      • Q(c);CHECK::R(D)+S(E),XQ(c)
      • Q(c);XP(F)::R(D)+S(E),XQ(c)
      • R(h);N_GUARD::R1(G),XR(h)
      • R(h);N_GUARD::R1(G)
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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).