MESON Chess Problem Database

Problem Display
PID: 82010 (4nr2/4Q3/p7/Kp1p3p/N2kNp1R/4pR1n/b3B3/6r1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Magyar Sakkszovetseg, 1979

4nr2/4Q3/p7/Kp1p3p/N2kNp1R/4pR1n/b3B3/6r1

#2

7 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Qc5#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qxe3#
      • 1...exd2
        • 2.Qe3#
      • 1...Rg4!
    • 1.Sf2?
      • threat
        • 2.Qxe3#
      • 1...exf2
        • 2.Qe3#
      • 1...Rg4!
  • Keys
    • 1.Sg3!
      • threat
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • P(h);SBLOCK,XS(D)::QAB1(G)
  • Tries
    • Try
      • S(D);P_PINP(f)
      • Threat
        • QAB1(G),XP(c)
      • Vars
        • P(c);XS(D)::QAB1(G)
      • Refutation
        • R(a);N_SPINP(f)
    • Try
      • S(D);P_PINP(f)
      • Threat
        • QAB1(G),XP(c)
      • Vars
        • P(c);XS(D)::QAB1(G)
      • Refutation
        • R(a);N_SPINP(f)
  • Actual
    • S(D);P_PINP(f)
    • Threat
      • QAB1(G),XP(c)
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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).