MESON Chess Problem Database

Problem Display
PID: 132406 (8/8/1p3p2/bB3R1n/1p1Q1r1N/1PpK2p1/bPN4n/5kB1 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Field, 1956

(First published on Thu Dec 27 1956)

8/8/1p3p2/bB3R1n/1p1Q1r1N/1PpK2p1/bPN4n/5kB1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3+
      • 2.Ke4#
    • 1...cxb2
      • 2.Kd2#
  • Tries
    • 1.Se3+?
      • 1...Ke1
        • 2.Shg2#
      • 1...Kxg1!
    • 1.Bxh2?
      • threat
        • 2.Ke3#
        • 2.Qg1#
      • 1...Rf3+
        • 2.Ke4#
        • 2.Rxf3#
      • 1...Rxf5
        • 2.Qg1#
      • 1...Bxb3
        • 2.Qg1#
      • 1...Rf2
        • 2.Ke3#
        • 2.Ke4#
      • 1...gxh2!
    • 1.Rxf4+?
      • 1...Sf3
        • 2.Ke4#
        • 2.Rxf3#
      • 1...Sxf4+!
    • 1.Qe3?
      • threat
        • 2.Qc1#
        • 2.Qe1#
      • 1...cxb2
        • 2.Kd2#
        • 2.Qe1#
      • 1...Rf3
        • 2.Kd4#
        • 2.Ke4#
      • 1...Sf3!
  • Keys
    • 1.Kc4!
      • threat
        • 2.Kd5#
      • 1...Bxb3+
        • 2.Kxb3#
      • 1...Ke2
        • 2.Kd5#
      • 1...Rxf5
        • 2.Qd1#
      • 1...Rf2
        • 2.Qd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(g);CHECK::B(H)+K(E)
    • P(d);XP(B)::B(H)+K(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(a);N_SPINR(g),P-FLIGHT::S(G)
      • Refutation
        • K(a);N_SPINR(g),P-FLIGHT,XB(A)
    • Try
      • B(A);XS(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(g);N_SPINR(g),XR(I)::QAR1(F)
        • B(b);XP(D)::QAR1(F)
      • Refutation
        • P(e);XB(A)
    • Try
      • R(I);CHECK,XR(g)
      • Refutation
        • S(i);CHECK,XR(I)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Refutation
        • S(c);N_SPINR(g)
  • Actual
    • K(E);P_SPINP(D),P_SPINQ(F),S_FLIGHT
    • Threat
      • B(H)+K(E)
    • Vars
      • B(b);CHECK,XP(D)::B(H)+K(E),XB(b)
      • K(a);N_SPINR(g),S_FLIGHT::B(H)+K(E)
      • R(g);N_PINQ(F),N_SPINR(g),XR(I)::QAR2(F)
      • R(g);N_PINQ(F)::QAR2(F)
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