MESON Chess Problem Database

Problem Display
PID: 189795 (q1b3n1/1p1p1N2/r7/r4kBP/8/1Q3P2/p7/K7 w - - 0 1)

Gross, Izidor

Magyar Sakkujsag, 1912

q1b3n1/1p1p1N2/r7/r4kBP/8/1Q3P2/p7/K7

#2

6 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qd5#
    • 1...Ra4
      • 2.Qd5#
    • 1...Rd5
      • 2.Qxd5#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qe4#
        • 2.Qg4#
      • 1...d5
        • 2.Qg4#
      • 1...Ra4
        • 2.Qd5#
      • 1...Re5
        • 2.Qg4#
      • 1...Re6
        • 2.Qf4#
        • 2.Qg4#
      • 1...Sh6
        • 2.Qe4#
      • 1...b5
        • 2.Qg4#
      • 1...b6
        • 2.Qg4#
      • 1...Sf6!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qe4#
      • 1...Re5
        • 2.Qxe5#
      • 1...Ra4
        • 2.Qe5#
      • 1...Re6
        • 2.Qf4#
      • 1...Sf6
        • 2.Sh6#
      • 1...b5
        • 2.Qe5#
      • 1...b6
        • 2.Sd6#
      • 1...d5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD::QAR2(B)
    • R(b);N_GUARD::QAR2(B),XR(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAB1(B)
        • R(b);N_GUARD::QAR2(B)
        • R(b);::QAB1(B)
        • S(i);::QAB1(B)
        • P(e);::QAB1(B)
      • Refutation
        • S(i);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • R(b);N_GUARD::QAR1(B),XR(b)
      • R(b);N_GUARD::QAR1(B)
      • R(d);SBLOCK::QAR1(B)
      • S(i);N_GUARD,S_CUTR(d)::S(F)
      • P(e);S_CUTR(b)::QAR1(B)
      • P(e);S_CUTR(d)::S(F)
      • P(f);S_CUTR(b)::QAR1(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).