MESON Chess Problem Database

Problem Display
PID: 119800 (4Bb1K/4p3/4N1P1/1q4Bk/2p3p1/4Q3/1p5p/7r w - - 0 1)

Simon, E

Karlovac Chess Club, 1912

4Bb1K/4p3/4N1P1/1q4Bk/2p3p1/4Q3/1p5p/7r

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.g7#
    • 1...Qb3
      • 2.g7#
    • 1...Qb4
      • 2.g7#
    • 1...Qa5
      • 2.g7#
    • 1...Qc5
      • 2.g7#
    • 1...Qd5
      • 2.g7#
    • 1...Qe5+
      • 2.g7#
    • 1...Qxg5
      • 2.Qxg5#
    • 1...Qb6
      • 2.g7#
    • 1...Qb7
      • 2.g7#
    • 1...Bg7+
      • 2.Sxg7#
    • 1...g3
      • 2.Qe2#
      • 2.Qf3#
  • Keys
    • 1.Qe5!
      • threat
        • 2.Sf4#
      • 1...Qxe5+
        • 2.g7#
      • 1...Bg7+
        • 2.Sxg7#
      • 1...g3
        • 2.Qe2#
      • 1...Rf1
        • 2.Qxh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • Q(f);N_GUARD,SBLOCK::B(E)+P(D)
    • Q(f);N_GUARD::B(E)+P(D)
    • Q(f);CHECK,N_GUARD::B(E)+P(D)
    • Q(f);OGATE,XB(B)::QAR1(A),XQ(f)
    • B(i);CHECK,N_GUARD::S(C),XB(i)
  • Actual
    • Q(A);
    • Threat
      • S(C)
    • Vars
      • Q(f);CHECK,N_GUARD,XQ(A)::B(E)+P(D)
      • B(i);CHECK,N_GUARD::S(C),XB(i)
      • P(e);OGATEB::QAB(A)
      • R(a);N_GUARD::QAR(A),XP(c)
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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).