MESON Chess Problem Database

Problem Display
PID: 187904 (8/4p3/4Bk1p/3P3K/8/6P1/4Q3/b7 w - - 0 1)

Wurzburg, Otto

Westen und Daheim, 1910

8/4p3/4Bk1p/3P3K/8/6P1/4Q3/b7

#2

5 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
  • Tries
    • 1.Qf1+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kg7!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kg7!
    • 1.Qf2+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kg7!
    • 1.Qe3?
      • 1...Kg7
        • 2.Qxh6#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Be5
        • 2.Qxh6#
      • 1...Bb2!
  • Keys
    • 1.Qd2!
      • 1...Ke5
        • 2.Qf4#
      • 1...Kg7
        • 2.Qxh6#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Be5
        • 2.Qxh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB(A),XB(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB1(A),XP(c)
        • B(a);N_GUARD::QAB(A),XB(a)
        • B(a);SBLOCK::QAR2(A),XP(c)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Vars
      • K(b);S_FLIGHT::QAB1(A)
      • K(b);S_FLIGHT::QAB1(A),XP(c)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::QAR2(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).