MESON Chess Problem Database

Problem Display
PID: 176422 (8/B6p/R7/1PNkp1nN/1K2p1B1/2Pb1rP1/3n2Q1/3Rbr2 w - - 0 1)

Gab, Wolfgang

Schach-Echo, 1981

8/B6p/R7/1PNkp1nN/1K2p1B1/2Pb1rP1/3n2Q1/3Rbr2

#2

11 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qa2#
    • 1...Sh3
      • 2.Be6#
    • 1...Se6
      • 2.Bxe6#
    • 1...Sf7
      • 2.Be6#
    • 1...e3
      • 2.Sf6#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sc7#
      • 1...Sxe6
        • 2.Bxe6#
      • 1...e3
        • 2.Sf6#
      • 1...Rf7!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Sef6#
      • 1...Kxe4
        • 2.Sf6#
      • 1...Bxe4
        • 2.c4#
      • 1...Sdxe4
        • 2.Qa2#
      • 1...Sgxe4
        • 2.Be6#
      • 1...Rf4
        • 2.Rd6#
      • 1...Rf6
        • 2.Sexf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • S(c);OGATE,P_PINP(C),P_SPINB(d)::QAB(B)
    • S(i);N_GUARD::B(F)
    • S(i);N_GUARD::B(F),XS(i)
    • P(f);P_SPINR(e)::S(I)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • S(i);OGATE,XS(H)::B(F),XS(i)
        • P(f);P_SPINR(e)::S(I)
      • Refutation
        • R(e);P_SPINP(f)
  • Actual
    • S(H);XP(f)
    • Threat
      • S(H)
    • Vars
      • K(g);P_SPINR(e),S_FLIGHT,XS(H)::S(I)
      • B(d);N_GUARD,P_SPINS(c),SBLOCK,XS(H)::P(C)
      • S(c);OGATE,P_PINP(C),P_SPINB(d),SBLOCK,XS(H)::QAB(B)
      • S(i);N_GUARD,SBLOCK,XS(H)::B(F)
      • R(e);P_PINS(H)::R1(J)
      • R(e);::QAB(B)+S(H),DCHECK,XR(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).