MESON Chess Problem Database

Problem Display
PID: 207028 (k2r4/1pK5/1Q2R3/3q4/8/8/8/8 w - - 0 1)

Lange, Max

Handbuch der Schachaufgaben (Lange), 1862

k2r4/1pK5/1Q2R3/3q4/8/8/8/8

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Qa5#
    • 1...Qa2
      • 2.Qxb7#
    • 1...Qg2
      • 2.Qa5#
    • 1...Qb3
      • 2.Qa5#
    • 1...Qf3
      • 2.Qa5#
    • 1...Qe4
      • 2.Qa5#
    • 1...Qxe6
      • 2.Qxb7#
    • 1...Qd1
      • 2.Qa5#
      • 2.Qxb7#
    • 1...Qd2
      • 2.Qxb7#
    • 1...Qd3
      • 2.Qxb7#
    • 1...Qd4
      • 2.Qxb7#
    • 1...Qa5
      • 2.Qxa5#
    • 1...Qf5
      • 2.Qxb7#
    • 1...Qg5
      • 2.Qxb7#
    • 1...Qh5
      • 2.Qxb7#
  • Keys
    • 1.Qa6+!
      • 1...bxa6
        • 2.Rxa6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 14
  • Sets
    • Q(a);N_GUARD::QAR(A)
    • Q(a);N_GUARD::QAB1(A),XP(b)
    • Q(a);N_GUARD,XR(B)::QAB1(A),XP(b)
    • Q(a);N_GUARD,P_PINQ(A)::QAR(A),XQ(a)
  • Actual
    • Q(A);CHECK
    • Vars
      • P(b);OGATE,XQ(A)::R(B),XP(b)
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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).