MESON Chess Problem Database

Problem Display
PID: 212961 (8/1P5b/1pq5/1p1pPQ1p/2k2NR1/n1P2B1R/P1N1P3/2K5 w - - 0 1)

Banny, Dimitry Nikolaevich

The Problemist, 1987

8/1P5b/1pq5/1p1pPQ1p/2k2NR1/n1P2B1R/P1N1P3/2K5

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc3
      • 2.Bxd5#
    • 1...Kc5
      • 2.Sd3#
    • 1...Qc8
      • 2.Qxc8#
      • 2.bxc8Q#
      • 2.bxc8R#
  • Tries
    • 1.Sxa3+?
      • 1...Kc5
        • 2.Sd3#
      • 1...Kxc3!
    • 1.Se3+?
      • 1...Kc5
        • 2.Sd3#
      • 1...Kxc3!
    • 1.Qd3+?
      • 1...Kc5
        • 2.Qd4#
      • 1...Bxd3!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Qxc6#
      • 1...Kxc3
        • 2.Sxd5#
      • 1...Kc5
        • 2.Se6#
      • 1...Qxc8
        • 2.bxc8Q#
        • 2.bxc8R#
      • 1...Qc5
        • 2.Bxd5#
      • 1...Qc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,XP(E)::R(G)+B(F),XP(d)
    • K(b);P-FLIGHT::S(H)
  • Tries
    • Try
      • S(C);CHECK,XS(a)
      • Vars
        • K(b);P-FLIGHT::S(H)
      • Refutation
        • K(b);P-FLIGHT,XP(E)
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::S(H)
      • Refutation
        • K(b);P-FLIGHT,XP(E)
    • Try
      • Q(K);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(K)
      • Refutation
        • B(h);XQ(K)
  • Actual
    • Q(K);P_PINQ(g)
    • Threat
      • QAR2(K),XQ(g)
    • Vars
      • K(b);P-FLIGHT,XP(E)::S(H),XP(d)
      • K(b);P-FLIGHT::S(H)
      • Q(g);N_SPINQ(g),OGATE,XQ(K)::PXQ(g)=Q
      • Q(g);::B(F),XP(d)
      • Q(g);OGATEB::QAR(K),XQ(g)
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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).