MESON Chess Problem Database

Problem Display
PID: 231408 (8/8/4p3/1p6/1p2p3/1QpkP3/P4P2/3K4 w - - 0 1)

Ballo, Gyorgy

Ujsag, 1927

8/8/4p3/1p6/1p2p3/1QpkP3/P4P2/3K4

#2

5 + 6

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Qd5#
  • Tries
    • 1.Qb1+?
      • 1...c2+
        • 2.Qxc2#
      • 1...Kc4!
    • 1.Qxb4?
      • threat
        • 2.Qd4#
        • 2.Qxb5#
      • 1...e5
        • 2.Qxb5#
      • 1...c2+!
    • 1.a4?
      • 1...bxa4 ep
        • 2.Qxb5#
      • 1...e5
        • 2.Qd5#
      • 1...bxa4!
  • Keys
    • 1.a3!
      • 1...bxa3
        • 2.Qxb5#
      • 1...e5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(f);N_GUARD::QAR2(D)
  • Tries
    • Try
      • Q(D);CHECK,N_PINP(a)
      • Vars
        • P(a);CHECK,P_SPINP(a)::QAB1(D),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);N_PINP(a),XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAB(D),XP(e)
      • Refutation
        • P(a);CHECK
    • Try
      • P(B);
      • Vars
        • P(c);EP,OGATE,XP(B)::QAB(D),XP(e)
        • P(f);N_GUARD::QAR2(D)
      • Refutation
        • P(e);XP(B)
  • Actual
    • P(B);
    • Vars
      • P(c);OGATE,XP(B)::QAB(D),XP(e)
      • P(f);N_GUARD::QAR2(D)
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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).