MESON Chess Problem Database

Problem Display
PID: 51429 (3Q4/3N3p/8/1pppp1p1/8/3kP3/P2B2P1/3K4 w - - 0 1)

Amirov, Talip Khasanovich

Twin, The Guardian, 1960

3Q4/3N3p/8/1pppp1p1/8/3kP3/P2B2P1/3K4

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Sxe5#
    • 1...c4
      • 2.Sc5#
    • 1...e4
      • 2.Se5#
  • Tries
    • 1.Sf6?
      • threat
        • 2.Qxd5#
      • 1...Kc4
        • 2.Qxd5#
      • 1...d4!
    • 1.Qa8?
      • threat
        • 2.Qxd5#
      • 1...Kc4
        • 2.Sxe5#
      • 1...d4
        • 2.Sxe5#
      • 1...Ke4!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qxd5#
      • 1...Kc4
        • 2.Sxe5#
      • 1...Ke4
        • 2.Qxh7#
      • 1...d4
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(a);S_FLIGHT::S(F),XP(e)
    • P(c);SBLOCK::S(F)
    • P(e);SBLOCK::S(F)
  • Tries
    • Try
      • S(F);P_PINP(d)
      • Threat
        • QAR2(G),XP(d)
      • Vars
        • K(a);N_SPINP(d),S_FLIGHT::QAB1(G),XP(d)
      • Refutation
        • P(d);
    • Try
      • Q(G);
      • Threat
        • QAR2(G),XP(d)
      • Vars
        • K(a);S_FLIGHT::S(F),XP(e)
        • P(d);::S(F),XP(e)
      • Refutation
        • K(a);P_SPINP(d),S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAR2(G),XP(d)
    • Vars
      • K(a);P_SPINP(d),S_FLIGHT::S(F),XP(e)
      • K(a);S_FLIGHT::QAB(G),XP(g)
      • P(d);::S(F),XP(c)
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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).