MESON Chess Problem Database

Problem Display
PID: 173700 (8/8/3p1N2/3PkpP1/1p1p1p2/pP3p2/K3p3/4Q3 w - - 0 1)

Boros, Sandor

Uj Nemezdek, 1924

8/8/3p1N2/3PkpP1/1p1p1p2/pP3p2/K3p3/4Q3

#2

6 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...f2
      • 2.Qxe2#
    • 1...d3
      • 2.Qa1#
  • Tries
    • 1.Qd2?
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...f2
        • 2.Qxe2#
      • 1...d3!
    • 1.Qf2?
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...d3!
    • 1.Qxb4?
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...d3
        • 2.Qc3#
      • 1...f2!
    • 1.Qa1?
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...f2!
    • 1.Qb1?
      • 1...d3
        • 2.Qa1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...f2!
    • 1.Qc1?
      • 1...d3
        • 2.Qa1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...f2!
    • 1.Qg1?
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...d3
        • 2.Qa1#
      • 1...f2!
  • Keys
    • 1.Qh1!
      • 1...d3
        • 2.Qa1#
      • 1...e1Q
        • 2.Qxe1#
      • 1...e1S
        • 2.Qxe1#
      • 1...e1B
        • 2.Qxe1#
      • 1...e1R
        • 2.Qxe1#
      • 1...f2
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR(A),XP(a)
    • P(e);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
        • P(c);N_GUARD::QAR(A),XP(a)
      • Refutation
        • P(e);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
      • Refutation
        • P(e);
    • Try
      • Q(A);N_PINP(a),XP(d)
      • Vars
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
        • P(e);OGATEB::QAB(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINP(a),P_PINP(e)
      • Vars
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • P(e);OGATEB::QAB(A)
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • P(e);OGATEB::QAB(A)
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
      • Refutation
        • P(c);
    • Try
      • Q(A);N_PINP(a)
      • Vars
        • P(a);OGATEB::QAR(A),XQ(a)
        • P(a);OGATEB::QAR(A),XS(a)
        • P(a);OGATEB::QAR(A),XB(a)
        • P(a);OGATEB::QAR(A),XR(a)
        • P(e);OGATEB::QAB(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);N_PINP(a)
    • Vars
      • P(e);OGATEB::QAB(A)
      • P(a);OGATEB::QAR(A),XQ(a)
      • P(a);OGATEB::QAR(A),XS(a)
      • P(a);OGATEB::QAR(A),XB(a)
      • P(a);OGATEB::QAR(A),XR(a)
      • P(c);::S(F)
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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).