MESON Chess Problem Database

Problem Display
PID: 231609 (2b5/1p1p4/1P1Q4/1p2ppp1/1B1pPk2/3P1p1P/3P1K2/8 w - - 0 1)

Ballo, Gyorgy

Ujsag, 1927

2b5/1p1p4/1P1Q4/1p2ppp1/1B1pPk2/3P1p1P/3P1K2/8

#2

8 + 10

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Qf8#
      • 2.Qf6#
    • 1...g4
      • 2.Qh6#
  • Tries
    • 1.Ba3?
      • 1...fxe4
        • 2.Qf8#
        • 2.Qf6#
      • 1...g4
        • 2.Qh6#
      • 1...b4!
    • 1.Ba5?
      • 1...fxe4
        • 2.Qf8#
        • 2.Qf6#
      • 1...g4
        • 2.Qh6#
      • 1...b4!
    • 1.Bc5?
      • 1...fxe4
        • 2.Qf8#
        • 2.Qf6#
      • 1...g4
        • 2.Qh6#
      • 1...b4!
  • Keys
    • 1.Qxd4!
      • threat
        • 2.Qe3#
      • 1...exd4
        • 2.Bd6#
      • 1...fxe4
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(g);OGATEB::QAB(H)
  • Tries
    • Try
      • B(E);
      • Vars
        • P(g);OGATEB::QAB(H)
      • Refutation
        • P(d);
    • Try
      • B(E);
      • Vars
        • P(g);OGATEB::QAB(H)
      • Refutation
        • P(d);
    • Try
      • B(E);
      • Vars
        • P(g);OGATEB::QAB(H)
      • Refutation
        • P(d);
  • Actual
    • Q(H);N_PINP(e),XP(b)
    • Threat
      • QAB1(H)
    • Vars
      • P(e);OGATEB,XQ(H)::B(E)
      • P(f);OGATE,P_SPINP(f),XP(F)::QAR1(H),XP(f)
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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).