MESON Chess Problem Database

Problem Display
PID: 173656 (b4n2/5KPp/3P3P/RN1npkpp/2R2P2/3P1B2/2Q1P2b/8 w - - 0 1)

Boros, Sandor

Skakbladet, 1934

b4n2/5KPp/3P3P/RN1npkpp/2R2P2/3P1B2/2Q1P2b/8

#2

12 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf4
      • 2.e4#
    • 1...Sxf4
      • 2.Sd4#
    • 1...exf4
      • 2.d4#
  • Tries
    • 1.d4+?
      • 1...e4
        • 2.Qxe4#
      • 1...Kxf4!
  • Keys
    • 1.g8Q!
      • threat
        • 2.Qxg5#
      • 1...Bxf4
        • 2.e4#
      • 1...Sxf4
        • 2.Sd4#
      • 1...exf4
        • 2.d4#
      • 1...gxf4
        • 2.Be4#
      • 1...Se6
        • 2.Qxh7#
      • 1...Sg6
        • 2.Qc8#
      • 1...g4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);SBLOCK,XP(F)::P(B)
    • S(b);SBLOCK,S_CUTP(c),XP(F)::S(H)
    • P(c);N_GUARD,SBLOCK,XP(F)::QAB(A)+P(C)
  • Tries
    • Try
      • P(C);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(A),XP(c)
      • Refutation
        • K(d);P-FLIGHT,XP(F)
  • Actual
    • P(L);
    • Threat
      • QAR1(L),XP(e)
    • Vars
      • B(a);SBLOCK,XP(F)::P(B)
      • S(b);SBLOCK,S_CUTP(c),XP(F)::S(H)
      • P(c);N_GUARD,SBLOCK,XP(F)::QAB(A)+P(C)
      • P(e);SBLOCK,XP(F)::B(D)
      • S(i);N_GUARD::QAB(L),XP(g)
      • S(i);OGATE::QAB(L)
      • P(e);::QAR1(L)
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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).