MESON Chess Problem Database

Problem Display
PID: 173584 (8/6N1/4p3/4Q3/6k1/8/6K1/7n w - - 0 1)

Boros, Sandor

Magyar Sakkvilag, 1926

8/6N1/4p3/4Q3/6k1/8/6K1/7n

#2

3 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kh4
      • 2.Qf4#
      • 2.Qh5#
    • 1...Sf2
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
  • Tries
    • 1.Kh2?
      • 1...Kh4
        • 2.Qf4#
        • 2.Qh5#
      • 1...Sf2
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Kf3!
    • 1.Qe3?
      • 1...Kh4
        • 2.Qf4#
      • 1...Sf2
        • 2.Qg3#
      • 1...Sg3
        • 2.Qxg3#
      • 1...e5!
    • 1.Qf5+?
      • 1...Kh4
        • 2.Qf4#
        • 2.Qh5#
      • 1...exf5!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Qg5#
      • 1...Kh4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);N_GUARD::QAR1(B),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(B)
        • S(a);N_GUARD::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Refutation
        • P(c);XQ(B)
  • Actual
    • S(C);XP(c)
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT::QAB1(B)
HTML5 logo

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).