MESON Chess Problem Database

Problem Display
PID: 63213 (4R3/4N3/2P1r3/3P1R2/3kN3/1Kp2r2/2Pp1P2/6QB w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

Chess, 1945

4R3/4N3/2P1r3/3P1R2/3kN3/1Kp2r2/2Pp1P2/6QB

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qg4#
    • 1...Rxf2
      • 2.Qxf2#
    • 1...Re3
      • 2.fxe3#
    • 1...Rg3
      • 2.fxg3#
    • 1...Rh3
      • 2.f3#
    • 1...Rf4
      • 2.f3#
    • 1...Rxf5
      • 2.f4#
    • 1...Rxc6
      • 2.Sxc6#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qc4#
      • 1...Kxe4
        • 2.Qd3#
        • 2.Qc4#
      • 1...Rxf2
        • 2.Qd3#
        • 2.Qxf2#
      • 1...Rxc6
        • 2.Sxc6#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rxf5!
    • 1.Qg7+?
      • 1...Kxe4
        • 2.Bxf3#
        • 2.Qg4#
      • 1...Re5
        • 2.Qxe5#
      • 1...Rf6!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa4#
      • 1...Kxe4
        • 2.Qa4#
      • 1...Rxf2
        • 2.Qxc3#
        • 2.Qa7#
      • 1...Rxf5
        • 2.Qxc3#
      • 1...Rxe4
        • 2.Qa7#
      • 1...Rxc6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(d);OGATEB,P-FLIGHT,P_SPINR(c),XS(F)::QAR2(A)
    • R(c);OGATE,P_SPINR(c),XP(D)::QAB(A),XR(c)
    • R(c);OGATE::P(D),XR(c)
    • R(c);OGATE::QAB(A)+P(D),XR(c)
    • R(c);OGATE::QAB(A)+P(D)
    • R(c);OGATE,XR(H)::QAB(A)+P(D)
    • R(e);XP(I)::S(J),XR(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • R(e);XP(I)::S(J),XR(e)
        • R(c);N_GUARD::QAR1(A),XR(c)
      • Refutation
        • R(c);XR(H)
    • Try
      • Q(A);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(A),XR(e)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • Q(A);P_PINP(b)
    • Threat
      • QAR(A)
    • Vars
      • K(d);N_SPINP(b),P-FLIGHT,P_SPINR(c),XS(F)::QAR(A)
      • R(c);N_GUARD,XR(H)::QAB1(A),XP(b)
      • R(e);SBLOCK,XS(F)::QAB(A)
      • R(e);XP(I)::S(J),XR(e)
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