MESON Chess Problem Database

Problem Display
PID: 199745 (8/B4B2/1K3p1n/3P3r/RPk1P3/7b/2p2r2/Q1N1b3 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1946

(First published on Sun Jul 14 1946)

8/B4B2/1K3p1n/3P3r/RPk1P3/7b/2p2r2/Q1N1b3

#2

9 + 8

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.b5#
    • 1...Rxd5
      • 2.Bxd5#
    • 1...Sf5
      • 2.d6#
  • Tries
    • 1.Ka6?
      • threat
        • 2.Qd4#
      • 1...Rd2
        • 2.b5#
      • 1...Bc3
        • 2.Qa2#
      • 1...Sf5
        • 2.d6#
      • 1...Bc8+!
    • 1.Kc6?
      • threat
        • 2.Qd4#
      • 1...Rd2
        • 2.b5#
      • 1...Bc3
        • 2.Qa2#
      • 1...Sf5
        • 2.d6#
      • 1...Bd7+!
  • Keys
    • 1.Ka5!
      • threat
        • 2.Qd4#
      • 1...Rxd5+
        • 2.Bxd5#
      • 1...Bxb4+
        • 2.Rxb4#
      • 1...Rd2
        • 2.b5#
      • 1...Bc3
        • 2.Qa2#
      • 1...Sf5
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);S_CUTB(a)::R(C)+P(D)
    • R(f);OGATE,P_SPINR(f),XP(F)::B(I),XR(f)
    • S(h);N_GUARD,S_CUTB(d),S_CUTR(f)::B(I)+P(F)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • R(c);S_CUTB(a)::R(C)+P(D)
        • B(a);SBLOCK::QAB(A)
        • S(h);N_GUARD,S_CUTB(d),S_CUTR(f)::B(I)+P(F)
      • Refutation
        • B(d);CHECK
    • Try
      • K(G);P-FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • R(c);S_CUTB(a)::R(C)+P(D)
        • B(a);SBLOCK::QAB(A)
        • S(h);N_GUARD,S_CUTB(d),S_CUTR(f)::B(I)+P(F)
      • Refutation
        • B(d);CHECK
  • Actual
    • K(G);P_SPINP(D),S_FLIGHT
    • Threat
      • QAR1(A)
    • Vars
      • R(f);CHECK,OGATE,P_SPINR(f),XP(F)::B(I),XR(f)
      • B(a);CHECK,OGATE,P_PINP(F),P_SPINB(a),XP(D)::R1(C),XB(a)
      • R(c);N_PINP(D),P_PINP(F)::R(C)+P(D)
      • B(a);SBLOCK::QAB(A)
      • S(h);OGATE::B(I)+P(F)
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