MESON Chess Problem Database

Problem Display
PID: 263160 (bB5K/b3p3/1p3QB1/R2nPP2/4kpnR/4p3/1rp1N3/4N3 w - - 0 1)

Pilchenko, Viacheslav Karlovich

Shavirin, Valery Mikhailovich

SuperProblem, 2021

bB5K/b3p3/1p3QB1/R2nPP2/4kpnR/4p3/1rp1N3/4N3

#2

10 + 11

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe5
      • 2.Qxe5#
    • 1...e6
      • 2.fxe6#
  • Tries
    • 1.Qg5?
      • threat
        • 2.f6#
      • 1...Sgf6
        • 2.Qg2#
      • 1...Sh6
        • 2.Qg2#
      • 1...Sdf6
        • 2.Qxf4#
      • 1...Sxe5!
    • 1.Qc6?
      • threat
        • 2.Qc4#
        • 2.f6#
      • 1...Bxc6
        • 2.f6#
      • 1...Sxe5
        • 2.Rxf4#
      • 1...bxa5
        • 2.f6#
      • 1...c1Q
        • 2.f6#
      • 1...c1R
        • 2.f6#
      • 1...Sf6
        • 2.Rxf4#
        • 2.Qc4#
      • 1...Rb4
        • 2.Qxc2#
        • 2.f6#
      • 1...Sh6
        • 2.Rxf4#
        • 2.Qc4#
      • 1...b5
        • 2.f6#
      • 1...Bxb8!
    • 1.Qe6?
      • threat
        • 2.f6#
      • 1...Sgf6
        • 2.exf6#
      • 1...Sdf6
        • 2.Qc4#
      • 1...Sh6!
  • Keys
    • 1.Qxb6!
      • threat
        • 2.f6#
      • 1...Bxb8
        • 2.Qd4#
      • 1...Sxe5
        • 2.Sg3#
      • 1...Sgf6
        • 2.Sg3#
      • 1...Sh6
        • 2.Sg3#
      • 1...Sdf6
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(f);OGATE,P_SPINP(e),XP(E)::QAR1(G),XS(f)
    • P(j);OGATE::B(H)+P(F),XP(j)
  • Tries
    • Try
      • Q(G);
      • Threat
        • B(H)+P(F)
      • Vars
        • S(f);OGATE,P_SPINP(e)::QAB(G)
        • S(g);N_GUARD::QAR1(G),XP(e)
      • Refutation
        • S(f);P_SPINP(e),XP(E)
    • Try
      • Q(G);P_PINS(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(k);N_SPINS(g),XQ(G)::B(H)+P(F)
        • S(f);OGATE,P_SPINP(e),XP(E)::R1(C),XP(e)
        • P(h);XR(D)::B(H)+P(F)
        • P(b);::B(H)+P(F)
        • P(h);::B(H)+P(F)
      • Refutation
        • B(i);XB(I)
    • Try
      • Q(G);
      • Threat
        • B(H)+P(F)
      • Vars
        • S(f);OGATE,P_SPINP(e)::QAR(G)+P(E),XS(f)
        • S(g);OGATE::QAR2(G)
      • Refutation
        • S(f);P_SPINP(e)
  • Actual
    • Q(G);XP(h)
    • Threat
      • B(H)+P(F)
    • Vars
      • B(i);N_GUARD,XB(I)::QAR1(G)
      • S(f);P_SPINP(e),XP(E)::S(B)
      • S(f);P_SPINP(e)::S(B)
      • S(g);N_GUARD::S(B)
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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).