MESON Chess Problem Database

Problem Display
PID: 205697 (2Q5/2pp4/3k1P2/5P2/3K4/8/8/8 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

2Q5/2pp4/3k1P2/5P2/3K4/8/8/8

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qa6#
    • 1...c5+
      • 2.Qxc5#
    • 1...c6
      • 2.Qb8#
  • Tries
    • 1.Kc4?
      • 1...Kc6
        • 2.Qa6#
      • 1...c5
        • 2.Qxc5#
      • 1...c6
        • 2.Qb8#
      • 1...Ke5!
    • 1.Qb7?
      • threat
        • 2.Qd5#
      • 1...c6
        • 2.Qb8#
      • 1...c5+!
    • 1.Qa8?
      • threat
        • 2.Qd5#
      • 1...c6
        • 2.Qb8#
      • 1...c5+!
  • Keys
    • 1.f7!
      • 1...c5+
        • 2.Qxc5#
      • 1...Kc6
        • 2.Qa6#
      • 1...Ke7
        • 2.f8Q#
      • 1...c6
        • 2.f8Q#
        • 2.f8B#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT,P_SPINP(b)::QAR2(D)
    • P(b);CHECK,OGATE::QAB1(D),XP(b)
    • P(b);OGATEB,SBLOCK::QAB(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR2(D)
        • P(b);OGATE::QAB1(D),XP(b)
        • P(b);OGATEB,SBLOCK::QAB(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(D)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • P(b);OGATEB,SBLOCK::QAB(D)
      • Refutation
        • P(b);CHECK
  • Actual
    • P(C);
    • Vars
      • P(b);CHECK,OGATE::QAB1(D),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::QAR2(D)
      • K(a);S_FLIGHT::P=Q
      • P(b);::P=Q
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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).