MESON Chess Problem Database

Problem Display
PID: 204300 (K2bB1RN/Rn1pk3/1r4Q1/1pP2rP1/1B6/8/8/3q4 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

Comm., Centurini/Guidelli MT, 1925

K2bB1RN/Rn1pk3/1r4Q1/1pP2rP1/1B6/8/8/3q4

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qf7#
    • 1...Re5
      • 2.Qf7#
    • 1...Rxg5
      • 2.Qf7#
    • 1...Rf7
      • 2.Qxf7#
    • 1...Sd6
      • 2.Rxd7#
    • 1...d5
      • 2.cxb6#
      • 2.c6#
  • Tries
    • 1.Rg7+?
      • 1...Rf7
        • 2.Qxf7#
      • 1...Kf8!
    • 1.Qh7+?
      • 1...Rf7
        • 2.Qxf7#
      • 1...Ke6!
    • 1.Qg7+?
      • 1...Rf7
        • 2.Qxf7#
      • 1...Ke6!
  • Keys
    • 1.Bf7!
      • threat
        • 2.Re8#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...d5
        • 2.c6#
      • 1...d6
        • 2.Qe6#
      • 1...Sd6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::QAR1(D)
    • R(c);N_GUARD,XP(C)::QAR1(D)
    • R(c);N_GUARD::QAR1(D),XR(c)
    • S(e);OGATE,P_SPINP(f)::R1(E),XP(f)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(D),XR(c)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(D),XR(c)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(D),XR(c)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • B(G);
    • Threat
      • R1(H)
    • Vars
      • R(c);OGATE,XB(G)::QAR1(D),XR(c)
      • P(f);N_GUARD,P_SPINS(e),S_CUTQ(a),S_CUTR(c)::B(A)+P(B)
      • P(f);N_GUARD,P_SPINS(e),S_CUTR(d)::QAR1(D)
      • S(e);P_SPINP(f),S_CUTR(d)::QAR1(D)
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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).