MESON Chess Problem Database

Problem Display
PID: 205149 (8/8/4BB2/n3p3/R1b2kP1/rR5p/p1N1PN1P/5n1K w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1952

(First published on Sun Nov 9 1952)

8/8/4BB2/n3p3/R1b2kP1/rR5p/p1N1PN1P/5n1K

#2

10 + 8

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa4
      • 2.Rf3#
    • 1...Sg3+
      • 2.hxg3#
    • 1...e4
      • 2.Sxh3#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Sd3#
        • 2.Sxh3#
      • 1...Sg3+
        • 2.hxg3#
      • 1...Rxa4
        • 2.Sxh3#
        • 2.Rf3#
      • 1...Sxh2
        • 2.Sxh3#
      • 1...e4
        • 2.Sxh3#
      • 1...Rxb3!
    • 1.Rxc4+?
      • 1...e4
        • 2.Sd3#
        • 2.Sxh3#
        • 2.Rxe4#
      • 1...Sxc4!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sd5#
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Sg3+
        • 2.hxg3#
      • 1...Rxa4
        • 2.Rf3#
      • 1...Se3
        • 2.Sbd3#
      • 1...e4
        • 2.Sxh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD,N_SPINB(e),XR(G)::R1(F)
    • S(a);CHECK,OGATE::P(E),XS(a)
    • P(h);N_SPINB(e),SBLOCK::S(D),XP(d)
  • Tries
    • Try
      • B(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);CHECK,OGATE::P(E),XS(a)
        • S(a);XP(E)::S(D),XP(d)
        • P(h);N_SPINB(e)::S(D),XP(d)
      • Refutation
        • R(c);XR(F)
    • Try
      • R(G);CHECK,XB(e)
      • Refutation
        • S(g);XR(G)
  • Actual
    • S(B);N_PINB(e)
    • Threat
      • S(B)
    • Vars
      • B(e);CHECK::R(G)+S(B),DCHECK,XB(e)
      • S(a);CHECK,OGATE::P(E),XS(a)
      • R(c);N_GUARD,XR(G)::R1(F)
      • S(a);SBLOCK::S(B)
      • P(h);SBLOCK::S(D),XP(d)
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