MESON Chess Problem Database

Problem Display
PID: 223019 (4B2B/8/8/2pkpP2/6Q1/5p2/2NK4/8 w - - 0 1)

Obermann, Johannes Hugo Wilhelm

Gorlitzer Schachverein Lusatia, 1885

4B2B/8/8/2pkpP2/6Q1/5p2/2NK4/8

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe4+?
      • 1...Kd6
        • 2.Qxe5#
      • 1...Kxe4!
  • Keys
    • 1.Qg3!
      • 1...Kc4
        • 2.Qg8#
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kd6
        • 2.Qxe5#
      • 1...f2
        • 2.Qd3#
      • 1...c4
        • 2.Qxe5#
      • 1...e4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(C),XP(d)
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(c);S_FLIGHT::QAB(C)
      • K(c);S_FLIGHT::QAR1(C),XP(d)
      • K(c);P-FLIGHT,P_SPINP(d)::QAB1(C),XP(d)
      • P(a);OGATE::QAR2(C)
      • P(b);SBLOCK::QAR1(C),XP(d)
      • P(d);SBLOCK::S(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).