MESON Chess Problem Database

Problem Display
PID: 235048 (1K1R4/1R6/3Pn1rb/pB1kPQ2/2p3N1/8/N1rp1B2/7q w - - 0 1)

Hoffmann, Fritz

Gaudium, 2012

1K1R4/1R6/3Pn1rb/pB1kPQ2/2p3N1/8/N1rp1B2/7q

#2

10 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf3
      • 2.Qxf3#
    • 1...Qa1
      • 2.Qf3#
    • 1...Qb1
      • 2.Qf3#
    • 1...Qc1
      • 2.Qf3#
    • 1...Qf1
      • 2.Qf3#
    • 1...Qg1
      • 2.Qf3#
    • 1...Qh2
      • 2.Qf3#
    • 1...Qh4
      • 2.Qf3#
    • 1...Qh5
      • 2.Qf3#
    • 1...Rb2
      • 2.Sc3#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Rg5
      • 2.Sf6#
    • 1...Rf6
      • 2.Sxf6#
      • 2.exf6#
    • 1...Rg7
      • 2.Sf6#
    • 1...Rg8
      • 2.Sf6#
    • 1...Sf4
      • 2.e6#
    • 1...Sc5
      • 2.e6#
    • 1...Sg5
      • 2.e6#
    • 1...Sc7
      • 2.e6#
    • 1...Sf8
      • 2.e6#
    • 1...a4
      • 2.Sb4#
  • Keys
    • 1.Sf6+!
      • 1...Rxf6
        • 2.exf6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 20
  • Sets
    • Q(a);N_GUARD::QAB(F),XQ(a)
    • Q(a);N_GUARD::QAB(F)
    • R(b);N_GUARD::S(A)
    • R(b);N_GUARD::S(A),XR(b)
    • R(h);N_GUARD::S(C)
    • R(h);N_GUARD,P_PINR(J)::S(C)
    • S(g);OGATE::QAR(F)+P(E)
    • P(e);N_GUARD::S(A)
  • Actual
    • S(C);CHECK
    • Vars
      • R(h);OGATE,XS(C)::QAR(F)+P(E),XR(h)
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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).