MESON Chess Problem Database

Problem Display
PID: 227415 (3b3N/4B1p1/6Bk/3q1ppN/5p2/3p1Q2/5n2/5K2 w - - 0 1)

Wielgos, Oskar

Schweizerische Schachzeitung, 1985

3b3N/4B1p1/6Bk/3q1ppN/5p2/3p1Q2/5n2/5K2

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...g4
      • 2.Qxf4#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Qh5#
      • 1...Qxf3
        • 2.Sxf5#
      • 1...g4
        • 2.Qxf4#
      • 1...Sg4!
    • 1.Sxf4?
      • threat
        • 2.Qh5#
      • 1...Qxf3
        • 2.Sf7#
      • 1...Sg4
        • 2.Qh3#
      • 1...g4!
    • 1.Bxg5+?
      • 1...Kxg5
        • 2.Qxf4#
      • 1...Bxg5!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qh5#
      • 1...Qxf3
        • 2.Sg8#
      • 1...gxf6
        • 2.Bf8#
      • 1...g4
        • 2.Qxf4#
      • 1...Sg4
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(f);OGATEB::QAB(B),XP(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • Q(d);N_GUARD,XQ(B)::S(C),XP(e)
        • P(f);OGATEB::QAB(B),XP(c)
      • Refutation
        • S(a);
    • Try
      • S(C);XP(c)
      • Threat
        • QAR1(B)
      • Vars
        • Q(d);N_GUARD,XQ(B)::S(F)
        • S(a);N_GUARD::QAR(B)
      • Refutation
        • P(f);
    • Try
      • B(E);CHECK,XP(f)
      • Vars
        • K(g);S_FLIGHT,XB(E)::QAB1(B),XP(c)
      • Refutation
        • B(i);XB(E)
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • Q(d);N_GUARD,XQ(B)::S(C)
      • P(h);OGATEB,XS(C)::B(E)
      • P(f);OGATEB::QAB(B),XP(c)
      • S(a);N_GUARD::QAR(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).