MESON Chess Problem Database

Problem Display
PID: 202540 (nR5Q/p3n2K/k2p2p1/8/2P5/1N3B2/6pR/3q3b w - - 0 1)

Rothler, Emil

Uj Nemezdek, 1923

nR5Q/p3n2K/k2p2p1/8/2P5/1N3B2/6pR/3q3b

#2

7 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.Qa1#
    • 1...Qa1
      • 2.Qxa1#
    • 1...Qd3
      • 2.Qa1#
    • 1...Sd5
      • 2.Qc8#
    • 1...Sf5
      • 2.Qc8#
    • 1...Sc6
      • 2.Qc8#
    • 1...Sc8
      • 2.Qxc8#
    • 1...Sb6
      • 2.Bb7#
    • 1...g1Q
      • 2.Ra2#
    • 1...g1S
      • 2.Ra2#
    • 1...g1B
      • 2.Ra2#
    • 1...g1R
      • 2.Ra2#
  • Tries
    • 1.Sc5+?
      • 1...Ka5
        • 2.Rb5#
        • 2.Qc3#
      • 1...dxc5!
    • 1.Bxd1?
      • threat
        • 2.Qa1#
      • 1...Sc6
        • 2.Qc8#
      • 1...Sb6!
  • Keys
    • 1.Rb5!
      • threat
        • 2.Bb7#
      • 1...Qxf3
        • 2.Qa1#
      • 1...g1Q
        • 2.Ra2#
      • 1...g1S
        • 2.Ra2#
      • 1...g1B
        • 2.Ra2#
      • 1...g1R
        • 2.Ra2#
      • 1...Qd5
        • 2.Qa1#
      • 1...Sd5
        • 2.Qc8#
      • 1...Sc6
        • 2.Qc8#
      • 1...Sb6
        • 2.Ra5#
      • 1...d5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD,XB(C)::QAR(G)
    • Q(a);N_GUARD::QAR(G),XQ(a)
    • Q(a);N_GUARD::QAR(G)
    • S(h);N_GUARD::QAB(G)
    • S(h);N_GUARD::QAB(G),XS(h)
    • S(i);SBLOCK::B(C)
    • P(c);OGATE::R(A)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • P(e);XS(B)
    • Try
      • B(C);XQ(a)
      • Threat
        • QAR(G)
      • Vars
        • S(h);N_GUARD::QAB(G)
      • Refutation
        • S(i);
  • Actual
    • R(F);
    • Threat
      • B(C)
    • Vars
      • Q(a);N_GUARD,XB(C)::QAR(G)
      • P(c);OGATE::R(A)
      • Q(a);N_GUARD::QAR(G)
      • S(h);N_GUARD::QAB(G)
      • S(i);SBLOCK::R1(F)
      • P(e);N_GUARD::S(B)
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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).