MESON Chess Problem Database

Problem Display
PID: 263181 (6b1/1K4B1/4P3/3N4/Q2PkPp1/3Np3/4P1n1/4b3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

SuperProblem, 2021

6b1/1K4B1/4P3/3N4/Q2PkPp1/3Np3/4P1n1/4b3

#2

9 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd5
      • 2.Qc6#
  • Tries
    • 1.Sc5+?
      • 1...Kf5
        • 2.Qc2#
      • 1...Kxd5!
    • 1.Se7?
      • threat
        • 2.Qc6#
      • 1...Sxf4
        • 2.Sc5#
      • 1...Bxe6!
    • 1.Qc6?
      • threat
        • 2.Se7#
      • 1...Kf5
        • 2.Se7#
      • 1...Bxe6
        • 2.Qxe6#
      • 1...Sxf4!
  • Keys
    • 1.Qc2!
      • threat
        • 2.S3b4#
      • 1...Kxd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Sc5#
      • 1...Sxf4
        • 2.S3xf4#
      • 1...Bb4
        • 2.S3xb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(C)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);N_GUARD,S_FLIGHT::QAB(C)
      • Refutation
        • K(d);S_FLIGHT,XS(F)
    • Try
      • S(F);
      • Threat
        • QAB(C)
      • Vars
        • S(b);SBLOCK,XP(E)::S(B)
      • Refutation
        • B(f);XP(G)
    • Try
      • Q(C);
      • Threat
        • QAB(C)+S(F)
      • Vars
        • K(d);S_FLIGHT::S(F)
        • B(f);OGATE,XP(G)::QAR2(C),XB(f)
      • Refutation
        • S(b);XP(E)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+S(B)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(C)
      • K(d);N_GUARD,S_FLIGHT::QAB(C)+S(B)
      • S(b);XP(E)::QAB(C)+S(B),XS(b)
      • B(a);::QAB(C)+S(B),XB(a)
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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).