MESON Chess Problem Database

Problem Display
PID: 156413 (r5n1/3B1p1K/3P1k1p/8/1P1N1PP1/7Q/3P4/7r w - - 0 1)

Akimov, Nikolai Nikolaevich

Pimenov, O

Best Problems, 2006

r5n1/3B1p1K/3P1k1p/8/1P1N1PP1/7Q/3P4/7r

#2

9 + 6

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rha1
      • 2.Qh4#
    • 1...Rb1
      • 2.Qh4#
    • 1...Rc1
      • 2.Qh4#
    • 1...Rd1
      • 2.Qh4#
    • 1...Re1
      • 2.Qh4#
    • 1...Rf1
      • 2.Qh4#
    • 1...Rg1
      • 2.Qh4#
    • 1...h5
      • 2.g5#
  • Tries
    • 1.Qxh6+?
      • 1...Sxh6
        • 2.g5#
      • 1...Rxh6+!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Sc2#
        • 2.Se2#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Sb5#
        • 2.Sf5#
        • 2.Sc6#
        • 2.Se6#
      • 1...Ra3
        • 2.Sb3#
      • 1...Rc1
        • 2.Sc2#
      • 1...Re1
        • 2.Se2#
      • 1...Rh3
        • 2.Sf3#
      • 1...Rh5
        • 2.Sf5#
      • 1...Ra5
        • 2.Sb5#
      • 1...Rc8
        • 2.Sc6#
      • 1...Re8
        • 2.Se6#

Anticipated by 10491(1965)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::QAB(B)
    • P(c);N_GUARD::P(F)
  • Tries
    • Try
      • Q(B);CHECK,P_SPINQ(B),XP(c)
      • Vars
        • S(f);XQ(B)::P(F)
      • Refutation
        • R(a);CHECK,XQ(B)
  • Actual
    • Q(B);
    • Threat
      • DUALS(8)
    • Vars
      • R(e);::QAB(B)+S(D)
      • R(a);::QAB(B)+S(D)
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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).