MESON Chess Problem Database

Problem Display
PID: 186053 (Rq3n2/bbp5/5B2/1N1p1B2/6p1/7p/k4P1Q/1R4K1 w - - 0 1)

Taylor, A

Problem Observer, 2017

Rq3n2/bbp5/5B2/1N1p1B2/6p1/7p/k4P1Q/1R4K1

#2

8 + 9

3713 Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.f3#
    • 1...c5
      • 2.f4#
  • Tries
    • 1.Bd4?
      • threat
        • 2.f3#
        • 2.f4#
      • 1...g3
        • 2.fxg3#
      • 1...c5
        • 2.f4#
      • 1...c6
        • 2.f4#
      • 1...Qe8!
    • 1.Rxa7+?
      • 1...Ba6
        • 2.Rxa6#
        • 2.f3#
        • 2.f4#
      • 1...Qxa7!
    • 1.Qg3?
      • threat
        • 2.Ra1#
        • 2.Qa3#
        • 2.Qb3#
      • 1...d4
        • 2.Qa3#
        • 2.Qb3#
      • 1...h2+!
    • 1.Qf4?
      • threat
        • 2.Qd2#
        • 2.Qa4#
      • 1...d4
        • 2.Qd2#
      • 1...h2+!
    • 1.Qe5?
      • threat
        • 2.Qa1#
        • 2.Qb2#
        • 2.Qe2#
      • 1...Qe8
        • 2.Qa1#
        • 2.Qb2#
      • 1...d4
        • 2.Qe2#
      • 1...h2+!
  • Keys
    • 1.Be7!
      • threat
        • 2.Sc3#
      • 1...d4
        • 2.f3#
      • 1...c5
        • 2.f4#

Anticipated by 81504(1951)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(d);N_PINP(C)::QAR(D)+P(C)
    • P(g);N_PINP(C)::QAR(D)+P(C)
  • Tries
    • Try
      • B(G);N_SPINP(C)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);OGATE::QAR(D)+P(C),XP(c)
        • P(g);::QAR(D)+P(C)
      • Refutation
        • Q(h);
    • Try
      • R(H);CHECK,N_SPINP(C),XB(e)
      • Refutation
        • Q(h);P_PINP(C),XR(H)
    • Try
      • Q(D);
      • Threat
        • DUALS(3)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);N_PINP(C)::QAR(D)
      • Refutation
        • P(b);CHECK
    • Try
      • Q(D);
      • Threat
        • DUALS(3)
      • Vars
        • P(d);N_PINP(C)::QAR(D)
      • Refutation
        • P(b);CHECK
  • Actual
    • B(G);
    • Threat
      • S(E)
    • Vars
      • P(d);N_PINP(C)::QAR(D)+P(C)
      • P(g);N_PINP(C)::QAR(D)+P(C)
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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).