MESON Chess Problem Database

Problem Display
PID: 227764 (8/8/8/8/1n6/8/3QbkBK/4N3 w - - 0 1)

Pikler, Robert

Magyar Sakkvilag, 1926

8/8/8/8/1n6/8/3QbkBK/4N3

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Sd3#
    • 1...Sc2
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sd5
      • 2.Sd3#
    • 1...Sa6
      • 2.Sd3#
    • 1...Sc6
      • 2.Sd3#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Qe1#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Sd3
        • 2.Qe3#
      • 1...Sd5
        • 2.Qe1#
      • 1...Sc6
        • 2.Qe1#
        • 2.Qe3#
      • 1...Sxc2!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Qxe2#
      • 1...Kf1
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • S(c);N_GUARD::S(A)
    • S(c);N_GUARD::S(A),XS(c)
  • Tries
    • Try
      • S(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);::QAB1(B)
      • Refutation
        • S(c);XS(A)
  • Actual
    • B(C);
    • Threat
      • QAR1(B),XB(a)
    • Vars
      • K(b);N_SPINB(a),P-FLIGHT::QAB1(B),XB(a)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).