MESON Chess Problem Database

Problem Display
PID: 261506 (r2nQ3/2q1N3/8/r7/2kN1R2/B7/2K5/3R4 w - - 0 1)

Winterer, Karl

Neue Zurcher Zeitung, 1965

r2nQ3/2q1N3/8/r7/2kN1R2/B7/2K5/3R4

#2

7 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe7
      • 2.Se6#
    • 1...Qc8
      • 2.Se2#
      • 2.Sb3#
      • 2.Sf3#
      • 2.Sb5#
      • 2.Sdf5#
      • 2.Se6#
    • 1...Rxa3
      • 2.Qb5#
    • 1...Ra4
      • 2.Qb5#
    • 1...Rb5
      • 2.Qxb5#
    • 1...R5a6
      • 2.Qb5#
    • 1...R5a7
      • 2.Qb5#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Rc3#
      • 1...Qxe7
        • 2.Se6#
      • 1...Rxa3
        • 2.Qb5#
      • 1...Qxf4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Se3#
      • 1...Kxd5+
        • 2.Sc6#
      • 1...Qh7+
        • 2.Sf5#
      • 1...Qxf4
        • 2.Sb6#
      • 1...Rxa3
        • 2.Qb5#
      • 1...Rxd5
        • 2.Qe2#
      • 1...Qe5
        • 2.Sb6#
      • 1...Qe7
        • 2.Se6#
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD,XS(F)::R(E)+S(D)
    • R(b);N_GUARD,XB(C)::QAB1(G)
    • R(b);N_GUARD::QAB1(G)
    • R(b);N_GUARD::QAB1(G),XR(b)
  • Tries
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • Q(c);N_GUARD,XS(F)::R(E)+S(D)
        • R(b);N_GUARD,XB(C)::QAB1(G)
      • Refutation
        • Q(c);XR(E)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(a);CHECK,N_GUARD,S_CUTQ(c),S_FLIGHT,XS(F)::R(A)+S(D)
      • Q(c);CHECK,N_GUARD::R(E)+S(D)
      • Q(c);N_GUARD,XR(E)::S(F)
      • R(b);N_GUARD,XB(C)::QAB1(G)
      • R(b);SBLOCK,XS(F)::QAB(G)
      • Q(c);N_GUARD::S(F)
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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).