MESON Chess Problem Database

Problem Display
PID: 170903 (4k3/1p1NpN2/3R1R2/3K1P2/3PQ3/8/8/8 w - - 0 1)

Hoek, Willem

Problemisten, 1961

4k3/1p1NpN2/3R1R2/3K1P2/3PQ3/8/8/8

#2

8 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qxe5#
    • 1...e6+
      • 2.Qxe6#
  • Tries
    • 1.Kc4?
      • 1...e5
        • 2.Qxe5#
      • 1...e6
        • 2.Qxe6#
      • 1...b6
        • 2.Qa8#
      • 1...b5+!
    • 1.Kc5?
      • 1...e5
        • 2.Qxe5#
      • 1...e6
        • 2.Qxe6#
      • 1...b5
        • 2.Qa8#
      • 1...b6+!
    • 1.Ke5?
      • 1...exd6+
        • 2.Kxd6#
      • 1...exf6+
        • 2.Kxf6#
      • 1...b5
        • 2.Qa8#
      • 1...b6
        • 2.Qa8#
      • 1...e6!
  • Keys
    • 1.Ke6!
      • 1...exd6
        • 2.Kxd6#
      • 1...exf6
        • 2.Kxf6#
      • 1...b5
        • 2.Qa8#
      • 1...b6
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • P(b);OGATEB::QAR(B),XP(b)
    • P(b);CHECK,OGATEB::QAR2(B),XP(b)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(b);OGATEB::QAR(B),XP(b)
        • P(b);OGATEB::QAR2(B),XP(b)
        • P(a);OGATE::QAR(B)
      • Refutation
        • P(a);CHECK
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(b);OGATEB::QAR(B),XP(b)
        • P(b);OGATEB::QAR2(B),XP(b)
        • P(a);OGATE::QAR(B)
      • Refutation
        • P(a);CHECK
    • Try
      • K(C);N_PINP(b),P-FLIGHT
      • Vars
        • P(b);CHECK,XR(E)::QAR(B)+K(C),XP(b)
        • P(b);CHECK,XR(F)::QAR(B)+K(C),XP(b)
        • P(a);OGATE::QAR(B)
      • Refutation
        • P(b);
  • Actual
    • K(C);N_PINP(b),S_FLIGHT
    • Vars
      • P(b);XR(E)::QAR(B)+K(C),XP(b)
      • P(b);XR(F)::QAR(B)+K(C),XP(b)
      • P(a);OGATE::QAR(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).