MESON Chess Problem Database

Problem Display
PID: 207761 (3R2B1/1pq1b3/r1pN3N/2npk2p/pQ1pp2p/K4Rr1/7B/5n2 w - - 0 1)

Millins, Edgar

Millins, James Lever

The Problemist, 1984

3R2B1/1pq1b3/r1pN3N/2npk2p/pQ1pp2p/K4Rr1/7B/5n2

#2

8 + 15

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Rf5#
    • 1...Sd3
      • 2.Rf5#
    • 1...Se6
      • 2.Sdf7#
      • 2.Shf7#
    • 1...d3
      • 2.Rf5#
    • 1...e3
      • 2.Rf5#
  • Tries
    • 1.Bxg3+?
      • 1...hxg3
        • 2.Rf5#
      • 1...Sxg3!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qxd4#
      • 1...cxb5
        • 2.Rxd5#
      • 1...Sb3
        • 2.Rf5#
      • 1...Sd3
        • 2.Rf5#
      • 1...Se6
        • 2.Sf7#
      • 1...Sd7
        • 2.Qxe7#
      • 1...d3
        • 2.Rf5#
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(g);N_PINR(C)::R1(C)
    • P(d);N_PINR(C)::R1(C)
    • P(e);N_PINR(C)::R1(C)
  • Tries
    • Try
      • B(A);CHECK,N_SPINR(C),XR(b)
      • Vars
        • P(f);XB(A)::R1(C)
      • Refutation
        • S(a);XB(A)
  • Actual
    • S(E);
    • Threat
      • QAB1(D),XP(d)
    • Vars
      • P(l);N_GUARD,XS(E)::R1(G),XP(h)
      • S(g);N_PINR(C),P_PINQ(D)::R1(C)
      • S(g);P_PINQ(D),SBLOCK::S(F)
      • S(g);OGATE,P_PINQ(D)::QAR2(D),XB(o)
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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).