MESON Chess Problem Database

Problem Display
PID: 169303 (8/5K2/3pN3/1Q1qk3/2PrP1R1/8/8/8 w - - 0 1)

Vasilenko, Anatoly Grigorovich

5th HM., SuperProblem 186. TT, 2017

8/5K2/3pN3/1Q1qk3/2PrP1R1/8/8/8

#2

6 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Qxd5#
    • 1...Rxe4
      • 2.Rg5#
      • 2.Qxd5#
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qh8#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...Qb7+
        • 2.Sc7#
      • 1...Qxe4
        • 2.Sg7#
      • 1...Rxe4
        • 2.Rg5#
      • 1...Qa8
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD,XP(A)::QAR1(D),XQ(b)
  • Actual
    • Q(D);N_PINQ(b)
    • Threat
      • QAB(D)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAR1(D),XQ(b)
      • Q(b);CHECK,N_PINS(E)::QAR(D)+S(E)
      • Q(b);N_PINS(E),XP(B)::QAR(D)+S(E)
      • R(a);SBLOCK,XP(B)::R(C)
      • Q(b);N_PINS(E)::QAR(D)+S(E)
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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).