MESON Chess Problem Database

Problem Display
PID: 204299 (3bN2Q/4R1n1/2p1bB2/2Pk2qR/1p6/pN1P3p/7K/8 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

3rd HM., Centurini/Guidelli MT, 1925

3bN2Q/4R1n1/2p1bB2/2Pk2qR/1p6/pN1P3p/7K/8

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Rxe5#
    • 1...Bf5
      • 2.Re5#
    • 1...Bc7+
      • 2.Sxc7#
    • 1...Bxe7
      • 2.Sc7#
  • Tries
    • 1.Bb2?
      • threat
        • 2.Sf6#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Bc7+
        • 2.Sxc7#
      • 1...Bxe7
        • 2.Sc7#
      • 1...Sxh5
        • 2.Qd4#
      • 1...Sxe8
        • 2.Qd4#
      • 1...Bf5
        • 2.Re5#
      • 1...Sf5
        • 2.Qe5#
      • 1...axb2!
    • 1.Bc3?
      • threat
        • 2.Sf6#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Bc7+
        • 2.Sxc7#
      • 1...Bxe7
        • 2.Sc7#
      • 1...Sxh5
        • 2.Qd4#
      • 1...Sxe8
        • 2.Qd4#
      • 1...Bf5
        • 2.Re5#
      • 1...Sf5
        • 2.Qe5#
      • 1...bxc3!
    • 1.Rxg5+?
      • 1...Bf5
        • 2.Re5#
      • 1...Sf5!
  • Keys
    • 1.Ba1!
      • threat
        • 2.Sf6#
      • 1...Qe5+
        • 2.Rxe5#
      • 1...Bc7+
        • 2.Sxc7#
      • 1...Bxe7
        • 2.Sc7#
      • 1...Sxh5
        • 2.Qd4#
      • 1...Sxe8
        • 2.Qd4#
      • 1...Bf5
        • 2.Re5#
      • 1...Sf5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(e);CHECK,OGATE::R1(E),XQ(e)
    • B(g);N_SPINQ(e),OGATE::R1(G)
    • B(i);CHECK,N_GUARD::S(H),XB(i)
    • B(i);N_GUARD,XR(G)::S(H)
  • Tries
    • Try
      • B(F);
      • Threat
        • S(H)
      • Vars
        • Q(e);CHECK,OGATE::R1(E),XQ(e)
        • B(i);CHECK,N_GUARD::S(H),XB(i)
        • B(i);N_GUARD,XR(G)::S(H)
        • S(h);N_SPINQ(e),OGATE,XR(E)::QAR1(I)
        • S(h);OGATE,XS(H)::QAR1(I)
        • B(g);N_SPINQ(e),OGATE::R1(G)
        • S(h);N_SPINQ(e),OGATE::QAR1(I)
      • Refutation
        • P(a);XB(F)
    • Try
      • B(F);
      • Threat
        • S(H)
      • Vars
        • Q(e);CHECK,OGATE::R1(E),XQ(e)
        • B(i);CHECK,N_GUARD::S(H),XB(i)
        • B(i);N_GUARD,XR(G)::S(H)
        • S(h);N_SPINQ(e),OGATE,XR(E)::QAR1(I)
        • S(h);OGATE,XS(H)::QAR1(I)
        • B(g);N_SPINQ(e),OGATE::R1(G)
        • S(h);N_SPINQ(e),OGATE::QAR1(I)
      • Refutation
        • P(c);XB(F)
    • Try
      • R(E);CHECK,XQ(e)
      • Vars
        • B(g);OGATE,P_SPINB(g)::R1(G)
      • Refutation
        • S(h);P_SPINS(h)
  • Actual
    • B(F);
    • Threat
      • S(H)
    • Vars
      • Q(e);CHECK,OGATE::R1(E),XQ(e)
      • B(i);CHECK,N_GUARD::S(H),XB(i)
      • B(i);N_GUARD,XR(G)::S(H)
      • S(h);N_SPINQ(e),OGATE,XR(E)::QAR1(I)
      • S(h);OGATE,XS(H)::QAR1(I)
      • B(g);N_SPINQ(e),OGATE::R1(G)
      • S(h);N_SPINQ(e),OGATE::QAR1(I)
HTML5 logo

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).