MESON Chess Problem Database

Problem Display
PID: 275261 (2b5/1p1p4/1R1Bp3/4K3/2kPQ3/2qN4/8/1N6 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

Western Morning News, 1926

(First published on Sat Jan 16 1926)

2b5/1p1p4/1R1Bp3/4K3/2kPQ3/2qN4/8/1N6

#2

7 + 6

15239 Valois Notebooks 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Rb4#
    • 1...Qe1
      • 2.Sb2#
    • 1...Qb2
      • 2.Sxb2#
    • 1...Qd2
      • 2.d5#
    • 1...Qb4
      • 2.Rxb4#
    • 1...Qxd4+
      • 2.Qxd4#
    • 1...Qa5+
      • 2.d5#
    • 1...Qc1
      • 2.Rb4#
      • 2.d5#
    • 1...Qc2
      • 2.Rb4#
      • 2.d5#
    • 1...Qa3
      • 2.d5#
    • 1...Qb3
      • 2.d5#
    • 1...Qxd3
      • 2.Rb4#
  • Tries
    • 1.Rxb7?
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Qa5+
        • 2.d5#
      • 1...Qxd3
        • 2.Rb4#
      • 1...Qb4
        • 2.Rxb4#
      • 1...Qe1
        • 2.Sb2#
      • 1...Qa1
        • 2.Rb4#
      • 1...Qb2
        • 2.Sxb2#
      • 1...Qd2
        • 2.d5#
      • 1...Qc1
        • 2.Rb4#
        • 2.d5#
      • 1...Qc2
        • 2.Rb4#
        • 2.d5#
      • 1...Qa3
        • 2.d5#
      • 1...Qb3
        • 2.d5#
      • 1...Bxb7!
    • 1.Qe2?
      • threat
        • 2.Sb2#
      • 1...Qa5+
        • 2.Sc5#
      • 1...Qxd3
        • 2.Rb4#
      • 1...Qb4
        • 2.Sc1#
        • 2.Sc5#
        • 2.Rxb4#
      • 1...Qb2
        • 2.Sxb2#
      • 1...Qxd4+!
  • Keys
    • 1.Kf6!
      • threat
        • 2.Se5#
      • 1...Qxd3
        • 2.Rb4#
      • 1...Qb4
        • 2.Rxb4#
      • 1...Qa5
        • 2.Sb2#
        • 2.d5#
      • 1...e5
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::R1(F)
    • Q(a);N_GUARD,N_PINP(C),P_PINQ(D)::S(B)
    • Q(a);N_GUARD::S(B),XQ(a)
    • Q(a);N_PINP(C)::QAR(D)+P(C)
    • Q(a);N_GUARD,N_PINP(C)::R1(F),XQ(a)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XP(C)::QAR1(D),XQ(a)
    • Q(a);CHECK,N_PINP(C)::QAR(D)+P(C)
    • Q(a);N_GUARD,N_PINP(C),XS(B)::R1(F)
  • Tries
    • Try
      • R(F);XP(d)
      • Vars
        • Q(a);CHECK,OGATE,P_SPINQ(a),XP(C)::QAR1(D),XQ(a)
        • Q(a);CHECK,N_PINP(C)::QAR(D)+P(C)
        • Q(a);N_GUARD,N_PINP(C),XS(B)::R1(F)
        • Q(a);N_GUARD,N_PINP(C)::R1(F),XQ(a)
        • Q(a);N_GUARD,N_PINP(C),P_PINQ(D)::S(B)
        • Q(a);N_GUARD::R1(F)
        • Q(a);N_GUARD::S(B),XQ(a)
        • Q(a);N_PINP(C)::QAR(D)+P(C)
      • Refutation
        • B(f);XR(F)
    • Try
      • Q(D);
      • Threat
        • QAB(D)+S(B),DCHECK
      • Vars
        • Q(a);CHECK,N_GUARD,N_PINP(C)::QAB(D)+S(B)
        • Q(a);N_GUARD,N_PINP(C),P_SPINQ(a),XS(B)::R1(F)
        • Q(a);::QAB(D)+S(B),DCHECK,XQ(a)
      • Refutation
        • Q(a);CHECK,XP(C)
  • Actual
    • K(E);S_FLIGHT
    • Threat
      • S(B)
    • Vars
      • Q(a);N_GUARD,N_PINP(C),XS(B)::R1(F)
      • Q(a);N_GUARD,N_PINP(C)::R1(F),XQ(a)
      • P(c);N_PINP(C)::S(B),XP(c)
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).