MESON Chess Problem Database

Problem Display
PID: 235773 (8/BN6/K2P4/R4PRq/2B1k3/3r1pP1/1b1P2Q1/6N1 w - - 0 1)

Shire, David J

The Problemist, 2020

8/BN6/K2P4/R4PRq/2B1k3/3r1pP1/1b1P2Q1/6N1

#2

12 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Rxg4#
    • 1...Qf7
      • 2.Rg4#
    • 1...Qe8
      • 2.Rg4#
    • 1...Qh1
      • 2.Rg4#
    • 1...Qh2
      • 2.Rg4#
    • 1...Qh7
      • 2.Rg4#
    • 1...Qh8
      • 2.Rg4#
    • 1...Rxd6+
      • 2.Sxd6#
  • Tries
    • 1.Qe2+?
      • 1...Re3
        • 2.Bd3#
        • 2.Qxe3#
        • 2.d3#
      • 1...fxe2!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.Sc5#
      • 1...Rxd6+
        • 2.Sxd6#
      • 1...Qxf3
        • 2.Rg4#
      • 1...Qxg5
        • 2.Sxg5#
      • 1...Rxd2
        • 2.Sxd2#
      • 1...Rxf3
        • 2.d3#
      • 1...Rd5
        • 2.Qe2#
      • 1...Ba3
        • 2.Re5#
      • 1...Bd4
        • 2.Bd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 7
  • Sets
    • Q(e);N_GUARD::R(H),XQ(e)
    • Q(e);N_GUARD::R(H)
    • R(b);CHECK,XP(J)::S(L),XR(b)
  • Tries
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Refutation
        • P(c);XQ(C)
  • Actual
    • S(A);XP(c)
    • Threat
      • S(L)
    • Vars
      • R(b);CHECK,XP(J)::S(L),XR(b)
      • Q(e);N_GUARD,P_SPINQ(e),XS(A)::R(H)
      • Q(e);XR(H)::QAB(C)+S(A),DCHECK,XQ(e)
      • R(b);XP(B)::QAB(C)+S(A),DCHECK,XR(b)
      • R(b);OGATE,P_SPINR(b),XS(A)::P(B)
      • R(b);N_GUARD::QAR2(C)
      • B(a);N_GUARD::R1(F)
      • B(a);S_CUTR(b)::B(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).