MESON Chess Problem Database

Problem Display
PID: 174973 (8/5K2/8/p4k2/PppP3P/3ppPP1/1Q2P3/8 w - - 0 1)

Unterberg, Jeno

Pesti Hirlap, 1901

8/5K2/8/p4k2/PppP3P/3ppPP1/1Q2P3/8

#2

8 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...dxe2
      • 2.Qb1#
      • 2.Qc2#
    • 1...d2
      • 2.Qb1#
      • 2.Qc2#
  • Tries
    • 1.Qc3?
      • 1...dxe2
        • 2.Qc2#
      • 1...b3
        • 2.Qxa5#
      • 1...d2
        • 2.Qc2#
      • 1...bxc3!
    • 1.Qb1?
      • 1...c3
        • 2.Qxd3#
      • 1...b3!
    • 1.Qa2?
      • 1...dxe2
        • 2.Qb1#
        • 2.Qc2#
      • 1...d2
        • 2.Qb1#
        • 2.Qc2#
      • 1...c3
        • 2.Qd5#
        • 2.Qe6#
      • 1...b3!
    • 1.Qb3?
      • 1...dxe2
        • 2.Qc2#
        • 2.Qb1#
      • 1...d2
        • 2.Qc2#
        • 2.Qb1#
      • 1...c3
        • 2.Qd5#
        • 2.Qe6#
      • 1...cxb3!
  • Keys
    • 1.Qd2!
      • 1...dxe2
        • 2.Qc2#
      • 1...exd2
        • 2.e4#
      • 1...b3
        • 2.Qxa5#
      • 1...c3
        • 2.Qxd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB,XP(B)::QAB(A)
        • P(c);OGATE::QAR(A),XP(e)
        • P(a);OGATEB::QAB(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);P_PINP(a)
      • Vars
        • P(d);N_GUARD::QAB(A),XP(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • P(a);OGATEB,XP(B)::QAB(A)
      • P(b);OGATE,XQ(A)::P(B)
      • P(c);OGATE::QAR(A),XP(e)
      • P(d);N_GUARD::QAB(A),XP(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).