MESON Chess Problem Database

Problem Display
PID: 267719 (2B2R2/8/2ppQBpN/2N2pp1/2PPR2b/1P2Pk2/5p1P/5K2 w - - 0 1)

Aliovsadzade, Rauf Gadzhiaga ogli

Novitski, Petr Adrinovich

5th Prize, Problemist Ukraini, 2018

2B2R2/8/2ppQBpN/2N2pp1/2PPR2b/1P2Pk2/5p1P/5K2

#2

13 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Bxg5#
      • 2.Qxe4#
    • 1...f4
      • 2.Qg4#
    • 1...g4
      • 2.Rf4#
  • Tries
    • 1.Sf7?
      • 1...fxe4
        • 2.Qxe4#
      • 1...Bg3
        • 2.Sxg5#
      • 1...f4
        • 2.Qg4#
      • 1...g4
        • 2.Rf4#
      • 1...d5
        • 2.Se5#
      • 1...dxc5!
  • Keys
    • 1.Qxd6!
      • 1...fxe4
        • 2.Bxg5#
      • 1...Bg3
        • 2.Qxg3#
      • 1...f4
        • 2.Bg4#
      • 1...g4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATE::QAB1(I)
    • P(e);N_GUARD::R1(G)
  • Tries
    • Try
      • S(K);
      • Vars
        • P(d);OGATE,XR(G)::QAB1(I),XP(d)
        • B(c);N_GUARD::S(K),XP(e)
        • P(d);OGATE::QAB1(I)
        • P(e);N_GUARD::R1(G)
        • P(g);N_GUARD::S(K)
      • Refutation
        • P(g);XS(H)
  • Actual
    • Q(I);XP(g)
    • Vars
      • P(d);OGATEB,XR(G)::R(M)+B(J),XP(e)
      • B(c);N_GUARD::QAR1(I),XB(c)
      • P(d);OGATE::B(L)
      • P(e);N_GUARD::QAR1(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).