MESON Chess Problem Database

Problem Display
PID: 119791 (8/8/8/8/8/2K2Q2/5p2/2B1k3 w - - 0 1)

Ursic, Andrej Anton

Deutsche Schachzeitung, 1905

8/8/8/8/8/2K2Q2/5p2/2B1k3

#2

3 + 2

1829 The Theory of Pawn Promotion 1912
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f1Q
      • 2.Bd2#
    • 1...f1B
      • 2.Bd2#
    • 1...f1R
      • 2.Bd2#
  • Tries
    • 1.Qxf2+?
      • 1...Kd1
        • 2.Qf1#
        • 2.Qd2#
      • 1...Kxf2!
    • 1.Qd3?
      • 1...f1Q
        • 2.Qd2#
      • 1...f1B
        • 2.Qd2#
      • 1...f1R
        • 2.Qd2#
      • 1...f1S!
    • 1.Qe3+?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kf1!
  • Keys
    • 1.Be3!
      • 1...Kf1
        • 2.Qxf2#
      • 1...f1Q
        • 2.Bd2#
      • 1...f1S
        • 2.Bf2#
      • 1...f1B
        • 2.Bd2#
        • 2.Bf2#
      • 1...f1R
        • 2.Bd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(b);::B(A)
  • Tries
    • Try
      • Q(C);CHECK,XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(A);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAR1(C),XP(b)
      • P(b);::B(A)
      • P(b);SBLOCK::B(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).