MESON Chess Problem Database

Problem Display
PID: 200832 (5b2/5B2/R4n2/1Nk1p3/1Rr1p3/K2p4/3Q4/3N3r w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Observer, 1949

(First published on Sun Jan 16 1949)

5b2/5B2/R4n2/1Nk1p3/1Rr1p3/K2p4/3Q4/3N3r

#2

7 + 8

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qxc1#
      • 2.Qe3#
    • 1...Rc2
      • 2.Qe3#
    • 1...Rc3+
      • 2.Qxc3#
    • 1...Rxb4
      • 2.Qxb4#
  • Tries
    • 1.Sb2?
      • threat
        • 2.Sa4#
      • 1...Rc3+
        • 2.Qxc3#
      • 1...Rxb4
        • 2.Qxb4#
      • 1...Ra1+!
    • 1.Sd6?
      • threat
        • 2.Rxc4#
      • 1...Rc3+
        • 2.Qxc3#
      • 1...Kd4
        • 2.Rxc4#
        • 2.Qe3#
      • 1...Rxb4
        • 2.Qxb4#
      • 1...Rc1
        • 2.Sb7#
        • 2.Qxc1#
        • 2.Qe3#
      • 1...Rc2
        • 2.Sb7#
        • 2.Qe3#
      • 1...Rd4
        • 2.Sb7#
        • 2.Rb5#
      • 1...Bxd6!
    • 1.Sa7?
      • threat
        • 2.Rxc4#
      • 1...Rc3+
        • 2.Qxc3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Rxb4
        • 2.Qxb4#
      • 1...Rc1
        • 2.Rc6#
        • 2.Qxc1#
        • 2.Qe3#
      • 1...Rc2
        • 2.Rc6#
        • 2.Qe3#
      • 1...Rd4
        • 2.Rb5#
        • 2.Rc6#
      • 1...Sd5!
    • 1.Qc1?
      • threat
        • 2.Qxc4#
      • 1...Rc3+
        • 2.Qxc3#
      • 1...Rc2
        • 2.Qe3#
      • 1...Rxc1!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Rxc4#
      • 1...Rc3+
        • 2.Qxc3#
      • 1...Kd4
        • 2.Qe3#
      • 1...Rxb4
        • 2.Qxb4#
      • 1...Sd5
        • 2.Se6#
      • 1...Rc1
        • 2.Qxc1#
        • 2.Qe3#
      • 1...Rc2
        • 2.Qe3#
      • 1...Rd4
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAB(B)
    • R(c);CHECK,OGATEB::QAR2(B),XR(c)
    • R(c);OGATE,XR(D)::QAB1(B),XR(c)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • R(c);CHECK,OGATEB::QAR2(B),XR(c)
        • R(c);OGATE,XR(D)::QAB1(B),XR(c)
      • Refutation
        • R(a);CHECK
    • Try
      • S(E);
      • Threat
        • R1(D),XR(c)
      • Vars
        • R(c);CHECK,OGATEB::QAR2(B),XR(c)
        • R(c);OGATE,XR(D)::QAB1(B),XR(c)
      • Refutation
        • B(h);XS(E)
    • Try
      • S(E);
      • Threat
        • R1(D),XR(c)
      • Vars
        • R(c);CHECK,OGATEB::QAR2(B),XR(c)
        • K(e);P_PINR(D),P_SPINP(b),P_SPINR(c),S_FLIGHT::QAB1(B)
        • R(c);OGATE,XR(D)::QAB1(B),XR(c)
      • Refutation
        • S(g);
    • Try
      • Q(B);P_PINR(c)
      • Threat
        • QAR1(B),XR(c)
      • Vars
        • R(c);CHECK,OGATEB::QAR2(B),XR(c)
        • R(c);N_GUARD::QAB(B)
      • Refutation
        • R(c);N_SPINR(c),XQ(B)
  • Actual
    • S(E);
    • Threat
      • R1(D),XR(c)
    • Vars
      • R(c);CHECK,OGATEB::QAR2(B),XR(c)
      • K(e);P_PINR(D),P_SPINP(b),P_SPINR(c),S_FLIGHT::QAB1(B)
      • R(c);OGATE,XR(D)::QAB1(B),XR(c)
      • S(g);SBLOCK::S(E)
      • R(c);N_GUARD::QAB(B)
      • R(c);SBLOCK::R1(D)
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