MESON Chess Problem Database

Problem Display
PID: 88521 (1Q6/4p1b1/5k2/4p2K/8/8/B7/8 w - - 0 1)

Hernitz, Zvonimir

The Problemist, 1975

1Q6/4p1b1/5k2/4p2K/8/8/B7/8

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf8
      • 2.Qxf8#
    • 1...Bh8
      • 2.Qf8#
    • 1...e4
      • 2.Qf4#
  • Tries
    • 1.Qb6+?
      • 1...e6
        • 2.Qxe6#
      • 1...Kf5!
    • 1.Qc8?
      • threat
        • 2.Qe6#
      • 1...Bf8
        • 2.Qxf8#
      • 1...Bh8
        • 2.Qf8#
      • 1...e6
        • 2.Qxe6#
      • 1...Bh6!
    • 1.Qg8?
      • threat
        • 2.Qe6#
        • 2.Qf7#
      • 1...e4
        • 2.Qe6#
      • 1...e6
        • 2.Qxe6#
      • 1...Bh6
        • 2.Qf7#
        • 2.Qg6#
      • 1...Bf8
        • 2.Qf7#
        • 2.Qg5#
        • 2.Qg6#
        • 2.Qxf8#
      • 1...Bh8
        • 2.Qf7#
        • 2.Qg5#
        • 2.Qg6#
        • 2.Qf8#
      • 1...Kf5!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qe6#
        • 2.Qf7#
        • 2.Qf3#
      • 1...Kf5
        • 2.Qf3#
      • 1...Bh6
        • 2.Qf7#
      • 1...Bf8
        • 2.Qf7#
      • 1...Bh8
        • 2.Qf7#
      • 1...e4
        • 2.Qe6#
      • 1...e6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(d);N_GUARD::QAR2(C),XB(d)
    • B(d);N_GUARD::QAR2(C)
    • P(a);OGATE::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAR1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • B(d);N_GUARD::QAR2(C),XB(d)
        • B(d);N_GUARD::QAR2(C)
        • P(c);::QAR1(C),XP(c)
      • Refutation
        • B(d);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(C)
        • P(c);::QAR1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • DUALS(3)
    • Vars
      • K(b);P-FLIGHT::QAR2(C)
      • B(d);::QAR1(C)
      • P(a);::QAR1(C)
      • P(c);::QAR1(C),XP(c)
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).