MESON Chess Problem Database

Problem Display
PID: 260835 (3K4/b1pQ4/2pRpp2/2p1rPRN/4kN2/3prp1p/1B3Pnq/8 w - - 0 1)

Dyachuk, Vasyl Vasilovich

1/3 Prize, Problemist Ukraini, 2020

3K4/b1pQ4/2pRpp2/2p1rPRN/4kN2/3prp1p/1B3Pnq/8

#2

9 + 14

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Sxf6#
    • 1...Sxf4
      • 2.Sxf6#
  • Tries
    • 1.Sxe6?
      • threat
        • 2.Sxf6#
      • 1...Rxe6
        • 2.Qxc6#
      • 1...fxg5
        • 2.Sxg5#
      • 1...Rxf5!
    • 1.Qxe6?
      • threat
        • 2.Qc4#
      • 1...Rxe6
        • 2.Rxe6#
      • 1...fxg5
        • 2.Qxe5#
      • 1...c4!
  • Keys
    • 1.Rxe6!
      • threat
        • 2.Qxc6#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Sxf4
        • 2.Sxf6#
      • 1...fxg5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(b);SBLOCK,XS(C)::S(F),XP(l)
    • S(a);SBLOCK,XS(C)::S(F),XP(l)
  • Tries
    • Try
      • S(C);XP(k)
      • Threat
        • S(F),XP(l)
      • Vars
        • R(i);N_GUARD,XS(C)::QAB(H),XP(j)
        • P(l);XR(E)::S(C),XP(l)
      • Refutation
        • R(i);XP(D)
    • Try
      • Q(H);P_PINR(i),XP(k)
      • Threat
        • QAR2(H)
      • Vars
        • R(i);N_SPINR(i),OGATE,XQ(H)::R(G),XR(i)
        • P(l);N_GUARD,XR(E)::QAR1(H),XR(i)
      • Refutation
        • P(h);
  • Actual
    • R(G);P_PINR(i),XP(k)
    • Threat
      • QAB(H),XP(j)
    • Vars
      • R(i);N_SPINR(i),OGATE,XR(G)::QAR2(H),XR(i)
      • S(a);SBLOCK,XS(C)::S(F),XP(l)
      • P(l);N_GUARD,XR(E)::R1(G),XR(i)
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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).