MESON Chess Problem Database

Problem Display
PID: 259290 (6B1/p2K1Nbb/3N2p1/R1pkP3/1n4R1/2Br1r2/6Q1/4n3 w - - 0 1)

Kummer, Konrad

Schweizerische Arbeiter Schachzeitung, 1941

6B1/p2K1Nbb/3N2p1/R1pkP3/1n4R1/2Br1r2/6Q1/4n3

#2

9 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Rd4#
    • 1...Rd4
      • 2.Rxd4#
    • 1...Sa2
      • 2.Qxa2#
    • 1...Sa6
      • 2.Qa2#
    • 1...Sc6
      • 2.Qa2#
  • Tries
    • 1.Se8?
      • threat
        • 2.Sc7#
      • 1...Rd4
        • 2.Rxd4#
      • 1...Sa6
        • 2.Qa2#
      • 1...Bxe5!
    • 1.Rc4?
      • threat
        • 2.Rcxc5#
        • 2.Raxc5#
      • 1...Rxc3
        • 2.Raxc5#
      • 1...Sa6!
    • 1.Qxf3+?
      • 1...Rxf3
        • 2.Rd4#
      • 1...Sxf3!
  • Keys
    • 1.Se4!
      • threat
        • 2.Rxc5#
      • 1...Kc4+
        • 2.Sfd6#
      • 1...Rxf7+
        • 2.Bxf7#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...Bf8
        • 2.Sf6#
      • 1...Sa6
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::R1(C)
    • R(b);N_GUARD::R1(C),XR(b)
    • S(d);N_GUARD::QAB(A),XS(d)
    • S(d);N_GUARD::QAB(A)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • R(b);N_GUARD::R1(C),XR(b)
        • S(d);N_GUARD::QAB(A)
      • Refutation
        • B(i);XP(E)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XB(B)::R1(D),XP(e)
      • Refutation
        • S(d);
    • Try
      • Q(A);CHECK,XR(c)
      • Vars
        • R(b);XQ(A)::R1(C)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • S(F);N_PINR(c)
    • Threat
      • R1(D),XP(e)
    • Vars
      • K(f);CHECK,N_SPINP(e),S_FLIGHT::B(I)+S(H),DCHECK
      • R(c);CHECK,OGATE,P_SPINR(c),XS(H)::B(I),XR(c)
      • R(b);XB(B)::S(F),XR(b)
      • B(i);N_GUARD::S(F)
      • S(d);N_GUARD::QAB(A)
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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).