MESON Chess Problem Database

Problem Display
PID: 206677 (8/8/4p3/1PPk4/8/2bK4/2P5/Qn4B1 w - - 0 1)

Feher, Gyula

Ujsag, 1925

8/8/4p3/1PPk4/8/2bK4/2P5/Qn4B1

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Qd4#
      • 2.c4#
    • 1...Bd2
      • 2.Qd4#
      • 2.c4#
    • 1...Bb4
      • 2.Qd4#
      • 2.c4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Ba5
      • 2.Qd4#
      • 2.c4#
    • 1...Be5
      • 2.Qa2#
      • 2.Qa8#
      • 2.c4#
    • 1...Bf6
      • 2.c4#
    • 1...Bg7
      • 2.c4#
    • 1...Bh8
      • 2.c4#
    • 1...e5
      • 2.Qa2#
  • Tries
    • 1.Qxc3?
      • threat
        • 2.Qd4#
      • 1...e5
        • 2.Qb3#
        • 2.Qc4#
      • 1...Sxc3!
    • 1.Qa6?
      • threat
        • 2.Qd6#
      • 1...Be5
        • 2.Qb7#
        • 2.Qa2#
        • 2.Qc6#
        • 2.Qa8#
        • 2.c4#
      • 1...Ke5!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qa2#
        • 2.Qa8#
      • 1...Bxa1
        • 2.c4#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...e5
        • 2.Qa2#
      • 1...Ba5
        • 2.Qa2#
        • 2.c4#
      • 1...Sd2
        • 2.Qa8#
      • 1...Sa3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(b);OGATE::QAR1(A),XB(b)
    • B(b);OGATE::P(C)
    • P(d);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);XB(b)
      • Threat
        • QAR1(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • B(B);
    • Threat
      • DUALS(2)
    • Vars
      • B(b);OGATE,XQ(A)::P(C)
      • B(b);OGATE,XB(B)::QAR1(A),XB(b)
      • P(d);::QAB(A)
      • S(a);::QAB(A)
      • S(a);OGATE::QAB(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).