MESON Chess Problem Database

Problem Display
PID: 205711 (8/2p5/2K5/2P5/kB6/8/1Q6/1n6 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

8/2p5/2K5/2P5/kB6/8/1Q6/1n6

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qa3#
    • 1...Sa3
      • 2.Qxa3#
    • 1...Sc3
      • 2.Qa3#
  • Tries
    • 1.Ba3?
      • threat
        • 2.Qb4#
      • 1...Ka5
        • 2.Qb5#
      • 1...Sxa3!
    • 1.Qc3?
      • 1...Sd2
        • 2.Qa3#
      • 1...Sa3
        • 2.Qxa3#
      • 1...Sxc3!
    • 1.Qa2+?
      • 1...Sa3
        • 2.Qxa3#
      • 1...Kxb4!
  • Keys
    • 1.Ba5!
      • threat
        • 2.Qb4#
      • 1...Kxa5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • S(a);XB(B)
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • K(b);P-FLIGHT,XB(B)
  • Actual
    • B(B);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);P-FLIGHT,XB(B)::QAR1(A)
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).