MESON Chess Problem Database

Problem Display
PID: 263054 (7q/B2RQp2/2p1Nb2/pp2p1PN/4kPPp/5p2/K4n2/5n2 w - - 0 1)

Murashev, Pavel Aleksandrovich

3rd Prize, SuperProblem, 2018

7q/B2RQp2/2p1Nb2/pp2p1PN/4kPPp/5p2/K4n2/5n2

#2

9 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qh7
      • 2.Sxf6#
    • 1...Qa8
      • 2.Sxf6#
    • 1...Qb8
      • 2.Sxf6#
    • 1...Qc8
      • 2.Sxf6#
    • 1...Qd8
      • 2.Sxf6#
    • 1...Qe8
      • 2.Sxf6#
    • 1...Qf8
      • 2.Sxf6#
    • 1...Qg8
      • 2.Sxf6#
    • 1...Bxg5
      • 2.Sxg5#
    • 1...Se3
      • 2.Sc5#
    • 1...a4
      • 2.Qb4#
    • 1...exf4
      • 2.Sc5#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Qxc6#
      • 1...Sxg4
        • 2.Qd3#
      • 1...exf4
        • 2.Qxf4#
      • 1...Qa8
        • 2.Sxf6#
      • 1...Qc8
        • 2.Sxf6#
      • 1...Se3
        • 2.Sc5#
      • 1...c5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxc6#
      • 1...Sxg4
        • 2.Qc2#
      • 1...exf4
        • 2.Qf5#
      • 1...Qa8
        • 2.Sxf6#
      • 1...Qc8
        • 2.Sxf6#
      • 1...Se3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(l);N_GUARD::S(E),XB(j)
    • B(j);XP(D)::S(F),XB(j)
    • S(a);SBLOCK::S(F)
    • P(f);N_GUARD::QAR(I)
    • P(h);XP(B)::QAR(I)+S(F),DCHECK
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAB(I),XP(i)
      • Vars
        • S(b);N_GUARD,XP(C)::QAB1(I)
        • P(h);OGATE,XP(B)::QAR1(I),XP(h)
        • Q(l);N_GUARD::S(E),XB(j)
        • S(a);SBLOCK::S(F)
      • Refutation
        • P(i);
  • Actual
    • Q(I);
    • Threat
      • QAB(I),XP(i)
    • Vars
      • S(b);N_GUARD,XP(C)::QAB(I)
      • P(h);OGATE,XP(B)::QAB1(I)
      • Q(l);N_GUARD::S(E),XB(j)
      • S(a);N_GUARD::QAR1(I),XS(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).