MESON Chess Problem Database

Problem Display
PID: 263072 (4Rnb1/Brp4p/1rQ4K/3NPp2/1P1kp3/4R1P1/5P1N/b7 w - - 0 1)

Janevski, Zivko

2nd HM., SuperProblem, 2013

4Rnb1/Brp4p/1rQ4K/3NPp2/1P1kp3/4R1P1/5P1N/b7

#2

11 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.Qc5#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Se2#
      • 1...Be6
        • 2.Qc5#
      • 1...Se6
        • 2.Qd5#
      • 1...Bc4!
    • 1.Sf6?
      • threat
        • 2.Qc5#
      • 1...Se6
        • 2.Qd5#
      • 1...Sd7!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sxf5#
      • 1...Kxe5
        • 2.Sf3#
      • 1...Be6
        • 2.Qc5#
      • 1...Se6
        • 2.Qd5#
      • 1...f4
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(i);N_PINQ(H)::QAB1(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • B(j);N_PINQ(H)::QAB1(H)
        • S(i);N_PINQ(H)::QAR1(H)
      • Refutation
        • B(j);
    • Try
      • S(F);N_SPINQ(H)
      • Threat
        • QAB1(H)
      • Vars
        • S(i);S_CUTB(j)::QAR1(H)
      • Refutation
        • S(i);
  • Actual
    • S(F);
    • Threat
      • S(F),XP(d)
    • Vars
      • K(b);N_SPINR(e),P_SPINP(c),S_FLIGHT,XP(G)::S(B)
      • B(j);N_PINQ(H)::QAB1(H)
      • S(i);N_PINQ(H)::QAR1(H)
      • P(d);::S(F)
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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).