MESON Chess Problem Database

Problem Display
PID: 227626 (8/8/3N4/4PRbP/4bpk1/2Q2p1R/7K/8 w - - 0 1)

Ballo, Gyorgy

Ujsag, 1926

8/8/3N4/4PRbP/4bpk1/2Q2p1R/7K/8

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxf3#
    • 1...Bc2
      • 2.Qxf3#
    • 1...Bxf5
      • 2.Qxf3#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qg1#
      • 1...Bh4
        • 2.Rxh4#
        • 2.Qxh4#
      • 1...f2!
    • 1.Qc1?
      • threat
        • 2.Qg1#
      • 1...Bh4
        • 2.Qxf4#
      • 1...f2!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Rxg5#
      • 1...Kxf5
        • 2.Qc8#
      • 1...Bxf5
        • 2.Qxf3#
      • 1...Bh4
        • 2.Sh6#
      • 1...Bf6
        • 2.Sh6#
      • 1...Bh6
        • 2.Sxh6#
      • 1...Be7
        • 2.Sh6#
      • 1...Bd8
        • 2.Sh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::QAB1(B),XP(a)
    • B(b);N_GUARD,XR(E)::QAB1(B),XP(a)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • B(e);N_GUARD::QAR1(B),XP(c)
      • Refutation
        • P(a);
  • Actual
    • S(G);
    • Threat
      • R1(E),XB(e)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(E)::QAB(B)
      • B(b);N_GUARD,SBLOCK,XR(E)::QAB1(B),XP(a)
      • B(e);N_GUARD::S(G)
      • B(e);N_GUARD::S(G),XB(e)
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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).