MESON Chess Problem Database

Problem Display
PID: 198784 (5N2/1r5q/2bB4/1p1kN1R1/4p3/6Qp/8/1K6 w - - 0 1)

Tosco, Giovanni

L'Alfiere di Re, 1921

5N2/1r5q/2bB4/1p1kN1R1/4p3/6Qp/8/1K6

#2

6 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Seg6#
  • Tries
    • 1.Qh2?
      • threat
        • 2.Qd2#
      • 1...Kd4
        • 2.Qd2#
      • 1...Kxd6
        • 2.Seg6#
      • 1...e3+!
    • 1.Qb3+?
      • 1...Kd4
        • 2.Sxc6#
        • 2.Se6#
      • 1...Kxd6!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qd2#
      • 1...e3+
        • 2.Seg6#
      • 1...Kd4
        • 2.Qd2#
      • 1...Kxd6
        • 2.Seg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT,XB(E)::QAB(B)+S(C)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • K(d);P-FLIGHT::QAR2(B)
        • K(d);P-FLIGHT,XB(E)::QAB(B)+S(C)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(B);CHECK
      • Refutation
        • K(d);P-FLIGHT,XB(E)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • P(b);CHECK::R(D)+S(C)
      • K(d);P-FLIGHT,P_SPINP(b)::QAR2(B)
      • K(d);P-FLIGHT,XB(E)::QAB(B)+S(C)
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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).