MESON Chess Problem Database

Problem Display
PID: 271891 (2n2Q2/2BBp3/3q1pp1/2p4P/b1Rb1kNP/1pN3R1/5P2/4K3 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

The Problemist, 1956

2n2Q2/2BBp3/3q1pp1/2p4P/b1Rb1kNP/1pN3R1/5P2/4K3

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5+
      • 2.Bxe5#
    • 1...gxh5
      • 2.Qh6#
    • 1...e6
      • 2.Qxf6#
  • Tries
    • 1.Bxd6+?
      • 1...exd6
        • 2.Qxf6#
      • 1...e5
        • 2.Bxe5#
        • 2.Qxf6#
      • 1...Sxd6!
    • 1.Qxe7?
      • threat
        • 2.Se2#
        • 2.Sd5#
        • 2.Qxf6#
        • 2.Qe3#
        • 2.Qe4#
      • 1...Bxd7
        • 2.Qe4#
      • 1...Sxe7
        • 2.Bxd6#
      • 1...Bc6
        • 2.Se2#
        • 2.Qxf6#
        • 2.Qe3#
      • 1...Sb6
        • 2.Se2#
        • 2.Bxd6#
        • 2.Qxd6#
        • 2.Qxf6#
        • 2.Qe3#
        • 2.Qe4#
      • 1...f5
        • 2.Se2#
        • 2.Sd5#
        • 2.Qg5#
        • 2.Qe3#
      • 1...Qe5+!
    • 1.hxg6?
      • threat
        • 2.Qh6#
      • 1...Qe5+
        • 2.Bxe5#
      • 1...e6
        • 2.Qxf6#
      • 1...Bxd7!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Sg4#
      • 1...Qe5+
        • 2.Se2#
        • 2.Sfe4#
      • 1...Ke5
        • 2.Sg4#
      • 1...Bxd7
        • 2.Sxd7#
      • 1...exf6
        • 2.Qxf6#
      • 1...e5
        • 2.Se2#
        • 2.Sfd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(f);CHECK,OGATE::B(I),XQ(f)
    • P(h);N_GUARD,XP(H)::QAB(K)
    • P(i);N_GUARD::QAR2(K),XP(g)
  • Tries
    • Try
      • B(I);CHECK,XQ(f)
      • Vars
        • P(i);XB(I)::QAR2(K),XP(g)
      • Refutation
        • S(j);XB(I)
    • Try
      • Q(K);N_PINP(g),XP(i)
      • Threat
        • DUALS(5)
      • Vars
        • B(b);XB(J)::QAR1(K)
        • S(j);N_GUARD,XQ(K)::B(I),XQ(f)
      • Refutation
        • Q(f);CHECK
    • Try
      • P(H);XP(h)
      • Threat
        • QAB(K)
      • Vars
        • Q(f);CHECK,OGATE::B(I),XQ(f)
        • P(i);N_GUARD::QAR2(K),XP(g)
      • Refutation
        • B(b);XB(J)
  • Actual
    • S(F);XP(g)
    • Threat
      • QAR(K)+S(F)
    • Vars
      • K(d);N_SPINB(c),S_FLIGHT::S(F)
      • B(b);XB(J)::QAR(K)+S(F),XB(b)
      • P(i);OGATE,P_SPINP(i),XS(F)::QAR2(K),XP(i)
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