MESON Chess Problem Database

Problem Display
PID: 176039 (8/2b5/K1p5/p1k1p3/2p2p2/P4Pp1/3Q4/3R4 w - - 0 1)

Ursprung, Karl

Schach-Echo, 1938

8/2b5/K1p5/p1k1p3/2p2p2/P4Pp1/3Q4/3R4

#2

5 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bb6
      • 2.Qd6#
    • 1...Bd6
      • 2.Qxa5#
      • 2.Qxd6#
    • 1...Bb8
      • 2.Qxa5#
    • 1...Bd8
      • 2.Qd6#
    • 1...g2
      • 2.Qf2#
    • 1...c3
      • 2.Qxc3#
    • 1...a4
      • 2.Qb4#
    • 1...e4
      • 2.Qd4#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qg1#
      • 1...c3
        • 2.Qxc3#
      • 1...e4!
    • 1.Qc3?
      • 1...Bb6
        • 2.Qxe5#
      • 1...Bd6
        • 2.Qxa5#
      • 1...Bb8
        • 2.Qxa5#
      • 1...Bd8
        • 2.Qxe5#
      • 1...a4
        • 2.Qb4#
      • 1...e4
        • 2.Qd4#
      • 1...g2!
  • Keys
    • 1.Qb2!
      • 1...c3
        • 2.Qxc3#
      • 1...Bb6
        • 2.Qxe5#
        • 2.Qxb6#
      • 1...Bd6
        • 2.Qb6#
      • 1...Bb8
        • 2.Qb6#
      • 1...Bd8
        • 2.Qxe5#
      • 1...g2
        • 2.Qf2#
      • 1...a4
        • 2.Qb4#
      • 1...e4
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(h);N_GUARD::QAB1(B)
    • B(h);N_GUARD::QAR2(B),XP(d)
    • P(a);N_GUARD::QAB(B)
    • P(b);OGATEB::QAR2(B),XP(b)
    • P(d);N_GUARD::QAB1(B)
    • P(f);N_GUARD::QAB1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • P(b);OGATEB::QAR2(B),XP(b)
      • Refutation
        • P(f);
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • B(h);N_GUARD::QAR2(B),XP(f)
        • B(h);N_GUARD::QAR2(B),XP(d)
        • P(d);N_GUARD::QAB1(B)
        • P(f);N_GUARD::QAB1(B)
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Vars
      • P(b);OGATEB::QAR2(B),XP(b)
      • B(h);N_GUARD::QAB1(B)
      • B(h);N_GUARD::QAR2(B),XP(f)
      • P(a);N_GUARD::QAB(B)
      • P(d);N_GUARD::QAB1(B)
      • P(f);N_GUARD::QAB1(B)
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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).