MESON Chess Problem Database

Problem Display
PID: 193730 (7k/5K1p/8/6P1/3pp3/8/8/4Q3 w - - 0 1)

Massmann, Wilhelm Karl Heinrich

Deutsche Schachblatter, 1916

7k/5K1p/8/6P1/3pp3/8/8/4Q3

#2

3 + 4

5454 Near Snap 2019
6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qc3#
      • 2.Qa1#
  • Tries
    • 1.Qh4?
      • 1...h5
        • 2.Qxh5#
      • 1...h6
        • 2.Qxh6#
      • 1...e3
        • 2.Qxd4#
      • 1...d3!
    • 1.Qd1?
      • threat
        • 2.Qxd4#
      • 1...h5
        • 2.Qxh5#
      • 1...d3
        • 2.Qa1#
      • 1...h6!
  • Keys
    • 1.Qh1!
      • 1...h5
        • 2.Qxh5#
      • 1...h6
        • 2.Qxh6#
      • 1...d3
        • 2.Qa1#
      • 1...e3
        • 2.Qa8#

This anticipates 167091(1989), 159562(2007)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);P_PINP(c)
      • Vars
        • P(c);OGATEB::QAR(A),XP(c)
        • P(c);OGATEB::QAR2(A),XP(c)
        • P(b);OGATE::QAB(A),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAB(A),XP(a)
      • Vars
        • P(c);OGATEB::QAR(A),XP(c)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);P_PINP(c)
    • Vars
      • P(c);OGATEB::QAR(A),XP(c)
      • P(c);OGATEB::QAR2(A),XP(c)
      • P(a);OGATEB::QAB(A)
      • P(b);OGATE::QAB1(A)
HTML5 logo

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).