MESON Chess Problem Database

Problem Display
PID: 265570 (5R2/1K2p3/4N3/1Q1n4/n2Pk1P1/2p4r/2N2B1b/2q5 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Probleemblad, 1950

5R2/1K2p3/4N3/1Q1n4/n2Pk1P1/2p4r/2N2B1b/2q5

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sg5#
    • 1...Qa3
      • 2.Sg5#
    • 1...Qg5
      • 2.Sxg5#
    • 1...Qa1
      • 2.Sg5#
    • 1...Qb1
      • 2.Sg5#
    • 1...Qd1
      • 2.Sg5#
    • 1...Qe1
      • 2.Sg5#
    • 1...Qf1
      • 2.Sg5#
    • 1...Qg1
      • 2.Sg5#
    • 1...Qh1
      • 2.Sg5#
    • 1...Qxc2
      • 2.Sg5#
    • 1...Re3
      • 2.Sg5#
    • 1...Sb2
      • 2.Sc5#
    • 1...Sc5+
      • 2.Sxc5#
    • 1...Sab6
      • 2.Sc5#
    • 1...Se3
      • 2.Sg5#
    • 1...Sb4
      • 2.Qf5#
    • 1...Sf4
      • 2.Sg5#
    • 1...Sdb6
      • 2.Qf5#
    • 1...Sf6
      • 2.Qf5#
    • 1...Sc7
      • 2.Qf5#
  • Tries
    • 1.Qe2+?
      • 1...Qe3
        • 2.Sg5#
      • 1...Re3
        • 2.Sg5#
      • 1...Se3!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qxd5#
      • 1...Sc5+
        • 2.Sxc5#
      • 1...Sxb4
        • 2.Qf5#
      • 1...Sf4
        • 2.Sg5#
      • 1...Sf6
        • 2.Qf5#
      • 1...Qg5
        • 2.Sxg5#
      • 1...Rh5
        • 2.Qd3#
      • 1...Sab6
        • 2.Sc5#
      • 1...Se3
        • 2.Qd3#
      • 1...Sdb6
        • 2.Qf5#
      • 1...Sc7
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 12
  • Sets
    • Q(a);N_GUARD,P_PINQ(E)::S(F)
    • Q(a);N_GUARD::S(F)
    • Q(a);N_GUARD::S(F),XQ(a)
    • Q(a);N_GUARD,XS(A)::S(F)
    • R(d);S_CUTQ(a)::S(F)
    • S(e);N_GUARD::S(F)
    • S(e);CHECK,N_GUARD::S(F),XS(e)
    • S(g);S_CUTQ(a)::S(F)
    • S(g);OGATE::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::S(F)
        • R(d);P_SPINR(d)::S(F)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • S(A);
    • Threat
      • QAB1(E),XS(g)
    • Vars
      • S(e);CHECK,N_GUARD::S(F),XS(e)
      • S(g);OGATE,XS(A)::QAB1(E)
      • S(g);S_CUTQ(a)::S(F)
      • S(g);OGATE::QAB1(E)
      • Q(a);N_GUARD::S(F),XQ(a)
      • R(d);N_GUARD::QAB1(E)
      • S(e);N_GUARD::S(F)
      • S(g);S_CUTR(d)::QAB1(E)
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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).