MESON Chess Problem Database

Problem Display
PID: 187780 (1N3K2/1p4n1/3pk3/r2N4/4BP2/7b/5B1p/1Q4nq w - - 0 1)

Neukomm, Gyula (Julius) R

Deutsches Wochenschach, 1909

1N3K2/1p4n1/3pk3/r2N4/4BP2/7b/5B1p/1Q4nq

#2

7 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxe4#
  • Tries
    • 1.Qxb7?
      • threat
        • 2.Qc8#
        • 2.Qd7#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Qxe4
        • 2.Qf7#
      • 1...Rxd5
        • 2.Qe7#
        • 2.Qf7#
      • 1...Rc5
        • 2.Qd7#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Sf5
        • 2.Qc8#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Ra7!
  • Keys
    • 1.Bh7!
      • threat
        • 2.Bg8#
      • 1...Kxd5
        • 2.Qb3#
      • 1...Qxd5
        • 2.Qg6#
      • 1...Rxd5
        • 2.Qg6#
      • 1...Qe4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(b);OGATE,XB(C)::QAR2(A),XQ(b)
  • Tries
    • Try
      • Q(A);XP(h)
      • Threat
        • DUALS(4)
      • Vars
        • Q(b);XB(C)::QAB1(A)
      • Refutation
        • R(e);
  • Actual
    • B(C);
    • Threat
      • B(C)
    • Vars
      • K(g);OGATEB,S_FLIGHT,XS(E)::QAB(A)
      • Q(b);SBLOCK,XS(E)::QAR2(A)
      • R(e);SBLOCK,XS(E)::QAR2(A)
      • Q(b);N_GUARD::QAR2(A),XQ(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).