MESON Chess Problem Database

Problem Display
PID: 197461 (2B2r2/5n2/5q2/3N1Rp1/2p1kN1p/rnb1P1pp/b1Pp4/3K1Q2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Suomen Shakki, 1986

2B2r2/5n2/5q2/3N1Rp1/2p1kN1p/rnb1P1pp/b1Pp4/3K1Q2

#2

8 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...h2
      • 2.Qg2#
    • 1...gxf4
      • 2.Qxf4#
  • Tries
    • 1.Se2?
      • threat
        • 2.Qf3#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Se5
        • 2.Sexc3#
      • 1...g4
        • 2.Qf4#
      • 1...Sd4!
    • 1.Sd3?
      • threat
        • 2.Qf3#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Sd4
        • 2.Sc5#
      • 1...g4
        • 2.Qf4#
      • 1...Se5!
    • 1.Sh5?
      • threat
        • 2.Qf3#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Sd4
        • 2.Shxf6#
      • 1...g4
        • 2.Qf4#
      • 1...Se5!
  • Keys
    • 1.Sg2!
      • threat
        • 2.Qf3#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Se5
        • 2.Sxc3#
      • 1...Sd4
        • 2.Sxf6#
      • 1...g4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(g);N_GUARD::QAB(B)
    • P(k);OGATE,XS(E)::QAR1(B),XP(k)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(B)
      • Vars
        • Q(l);OGATE,XR(G)::QAB1(B),XQ(l)
        • S(m);S_CUTQ(l)::S(E),XB(e)
        • P(k);N_GUARD::QAR1(B)
      • Refutation
        • S(d);
    • Try
      • S(E);
      • Threat
        • QAB1(B)
      • Vars
        • Q(l);OGATE,XR(G)::QAB1(B),XQ(l)
        • S(d);N_GUARD::S(E)
        • P(k);N_GUARD::QAR1(B)
      • Refutation
        • S(m);
    • Try
      • S(E);
      • Threat
        • QAB1(B)
      • Vars
        • Q(l);OGATE,XR(G)::QAB1(B),XQ(l)
        • S(d);S_CUTB(e)::S(E),XQ(l)
        • P(k);N_GUARD::QAR1(B)
      • Refutation
        • S(m);
  • Actual
    • S(E);
    • Threat
      • QAB1(B)
    • Vars
      • Q(l);OGATE,XR(G)::QAB1(B),XQ(l)
      • S(m);S_CUTQ(l)::S(F),XB(e)
      • S(d);S_CUTB(e)::S(F),XQ(l)
      • P(k);N_GUARD::QAR1(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).