MESON Chess Problem Database

Problem Display
PID: 15201 (2Q5/3Rp1qn/8/3P4/nKNk4/8/7B/1B6 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

HM., Chervoni Girnik, 1981

2Q5/3Rp1qn/8/3P4/nKNk4/8/7B/1B6

#2

7 + 5

2988 Izbrannie Kompozitsi 1985
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Bxe5#
    • 1...Qh6
      • 2.Be5#
    • 1...Qf8
      • 2.Be5#
    • 1...Qh8
      • 2.Bg1#
    • 1...Qg1
      • 2.Bxg1#
      • 2.Be5#
    • 1...Qg2
      • 2.Be5#
    • 1...Qg4
      • 2.Be5#
    • 1...Qg6
      • 2.Be5#
    • 1...Qf7
      • 2.Be5#
    • 1...Qg8
      • 2.Be5#
    • 1...Sb2
      • 2.Qc5#
    • 1...Sc3
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sb6
      • 2.Qc5#
    • 1...Sg5
      • 2.Bg1#
    • 1...Sf6
      • 2.Be5#
  • Keys
    • 1.Qh8!
      • threat
        • 2.Bg1#
      • 1...Sf6
        • 2.Be5#
      • 1...e5
        • 2.dxe5 ep#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 14
  • Sets
    • Q(d);N_GUARD::B(B),XQ(d)
    • Q(d);N_GUARD::B(B)
    • S(a);N_GUARD::QAB1(G)
    • S(a);N_GUARD::QAB1(G),XS(a)
    • S(e);S_CUTQ(d)::B(B)
  • Actual
    • Q(G);P_PINQ(d)
    • Threat
      • B(B)
    • Vars
      • S(e);N_SPINQ(d),S_CUTQ(d)::B(B)
      • P(c);N_SPINQ(d),OGATE::R(F)+P(E),XP(c),EP
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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).