MESON Chess Problem Database

Problem Display
PID: 199504 (6Bb/8/2N5/8/4kBK1/2nppNQ1/2pq4/3bR3 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1945

(First published on Sun Sep 23 1945)

6Bb/8/2N5/8/4kBK1/2nppNQ1/2pq4/3bR3

#2

7 + 8

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Rxe3#
    • 1...Qh2
      • 2.Rxe3#
    • 1...Bxf3+
      • 2.Qxf3#
    • 1...Se2
      • 2.Sg5#
    • 1...Sd5
      • 2.Bh7#
    • 1...e2
      • 2.Sxd2#
      • 2.Sg5#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Bh7#
      • 1...Qh2
        • 2.Rxe3#
      • 1...Bxf3+!
    • 1.Se7?
      • threat
        • 2.Bh7#
      • 1...Qh2
        • 2.Rxe3#
      • 1...Bxf3+!
    • 1.Bg5?
      • threat
        • 2.Qf4#
      • 1...Bxf3+
        • 2.Qxf3#
      • 1...Qg2
        • 2.Rxe3#
      • 1...Qh2
        • 2.Rxe3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sd5
        • 2.Bh7#
      • 1...e2
        • 2.Sxd2#
      • 1...Se2!
    • 1.Qh3?
      • threat
        • 2.Qh7#
      • 1...Bxf3+
        • 2.Qxf3#
      • 1...Qh2
        • 2.Rxe3#
      • 1...Qg2+!
  • Keys
    • 1.Bh6!
      • threat
        • 2.Qf4#
      • 1...Bxf3+
        • 2.Qxf3#
      • 1...Qg2
        • 2.Rxe3#
      • 1...Qh2
        • 2.Rxe3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Se2
        • 2.Sg5#
      • 1...Sd5
        • 2.Bh7#
      • 1...e2
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD,P_PINQ(C)::R1(A),XP(f)
    • Q(c);N_GUARD::R1(A),XP(f)
    • B(a);CHECK,OGATE,XS(B)::QAB1(C),XB(a)
    • S(d);N_PINS(B),N_SPINP(f)::S(B)
    • S(d);SBLOCK::B(G)
  • Tries
    • Try
      • S(F);
      • Threat
        • B(G)
      • Vars
        • Q(c);N_GUARD::R1(A),XP(f)
      • Refutation
        • B(a);CHECK,XS(B)
    • Try
      • S(F);
      • Threat
        • B(G)
      • Vars
        • Q(c);N_GUARD::R1(A),XP(f)
      • Refutation
        • B(a);CHECK,XS(B)
    • Try
      • B(D);
      • Threat
        • QAR1(C)
      • Vars
        • B(a);CHECK,OGATE,XS(B)::QAB1(C),XB(a)
        • Q(c);N_GUARD,P_PINQ(C)::R1(A),XP(f)
        • Q(c);N_GUARD::R1(A),XP(f)
        • B(h);N_GUARD::QAR1(C),XB(h)
        • S(d);SBLOCK::B(G)
        • P(f);N_PINS(B)::S(B),XQ(c)
      • Refutation
        • S(d);N_PINS(B),N_SPINP(f)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • B(a);CHECK,OGATE,XS(B)::QAB1(C),XB(a)
        • Q(c);N_GUARD::R1(A),XP(f)
      • Refutation
        • Q(c);CHECK
  • Actual
    • B(D);
    • Threat
      • QAR1(C)
    • Vars
      • B(a);CHECK,OGATE,XS(B)::QAB1(C),XB(a)
      • Q(c);N_GUARD,P_PINQ(C)::R1(A),XP(f)
      • Q(c);N_GUARD::R1(A),XP(f)
      • B(h);N_GUARD::QAR1(C),XB(h)
      • S(d);N_PINS(B),N_SPINP(f)::S(B)
      • S(d);SBLOCK::B(G)
      • P(f);N_PINS(B)::S(B),XQ(c)
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