MESON Chess Problem Database

Problem Display
PID: 227894 (8/8/2K5/8/1pk5/3p4/1Q1P4/8 w - - 0 1)

Ballo, Gyorgy

Magyar Sakkvilag, 1926

8/8/2K5/8/1pk5/3p4/1Q1P4/8

#2

3 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Qc3#
  • Tries
    • 1.Qa1?
      • 1...b3
        • 2.Qc3#
        • 2.Qa4#
      • 1...Kb3!
    • 1.Qe5?
      • threat
        • 2.Qd5#
      • 1...b3
        • 2.Qc3#
        • 2.Qf4#
        • 2.Qe4#
        • 2.Qc5#
      • 1...Kb3!
    • 1.Qf6?
      • 1...b3
        • 2.Qc3#
        • 2.Qh4#
        • 2.Qf4#
      • 1...Kb3!
    • 1.Qg7?
      • 1...b3
        • 2.Qc3#
        • 2.Qg4#
      • 1...Kb3!
    • 1.Qh8?
      • 1...b3
        • 2.Qc3#
        • 2.Qh4#
      • 1...Kb3!
    • 1.Qb3+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Kxb3!
  • Keys
    • 1.Qa2+!
      • 1...Kd4
        • 2.Qd5#
      • 1...b3
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(c);OGATE,P-FLIGHT::QAR1(A)
      • P(b);OGATEB,P_SPINP(b)::QAR2(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).