MESON Chess Problem Database

Problem Display
PID: 86961 (8/4K2B/4pp2/2pPk3/2P1P2R/8/1b6/3Q4 w - - 0 1)

Benko, Pal Charles

Magyar Sakkelet, 1982

8/4K2B/4pp2/2pPk3/2P1P2R/8/1b6/3Q4

#2

7 + 5

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Qxa1#
    • 1...exd5
      • 2.Qxd5#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qxb2#
      • 1...exd5
        • 2.Qxd5#
      • 1...Bc1
        • 2.Qc3#
      • 1...Ba3
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qf4#
        • 2.Qh2#
      • 1...Ba1!
  • Keys
    • 1.Qe1!
      • 1...Kd4
        • 2.e5#
      • 1...exd5
        • 2.exd5#
      • 1...Bc1
        • 2.Qc3#
      • 1...Ba1
        • 2.Qxa1#
      • 1...Ba3
        • 2.Qc3#
      • 1...Bc3
        • 2.Qxc3#
      • 1...Bd4
        • 2.Qg3#
      • 1...f5
        • 2.exf5#

Anticipated by 18289(1954)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATEB::QAB(A),XB(a)
    • P(d);OGATE,XP(E)::QAR1(A),XP(d)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A),XB(a)
      • Vars
        • P(d);OGATE,XP(E)::QAR1(A),XP(d)
        • B(a);N_GUARD::QAB(A)
        • B(a);N_GUARD::QAB(A),XB(a)
      • Refutation
        • B(a);
  • Actual
    • Q(A);
    • Vars
      • K(c);OGATE,S_FLIGHT::R(D)+P(C)
      • P(d);OGATE,XP(E)::QAR(A)+P(C),XP(d)
      • B(a);N_GUARD::QAB(A)
      • B(a);OGATEB::QAB(A),XB(a)
      • B(a);N_GUARD::QAB(A),XB(a)
      • B(a);SBLOCK::QAB(A)
      • P(e);OGATE::QAR(A)+P(C),XP(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).