MESON Chess Problem Database

Problem Display
PID: 63621 (5n2/2R4p/3Kp1b1/pp2pp2/rk1n3Q/q3p3/1Ppr4/1NN1BB2 w - - 0 1)

Bonavia-Hunt, Rev Noel Aubrey

Chess, 1946

5n2/2R4p/3Kp1b1/pp2pp2/rk1n3Q/q3p3/1Ppr4/1NN1BB2

#2

8 + 15

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.bxc3#
  • Tries
    • 1.Kxe5?
      • threat
        • 2.Qe7#
        • 2.Qxd4#
      • 1...Qxb2
        • 2.Qe7#
      • 1...Qa2
        • 2.Qe7#
      • 1...Qb3
        • 2.Qe7#
      • 1...Qc3
        • 2.bxc3#
      • 1...Qd3
        • 2.Qe7#
      • 1...f4
        • 2.Qe7#
      • 1...Sd7+!
    • 1.Bxd2+?
      • 1...Qc3
        • 2.Bxc3#
        • 2.bxc3#
      • 1...exd2!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Kxe5#
      • 1...Sb3+
        • 2.Sd3#
      • 1...Sf3+
        • 2.Kc6#
      • 1...Sc6+
        • 2.Kxc6#
      • 1...Qc3
        • 2.bxc3#
      • 1...Sd7
        • 2.Kxd7#
      • 1...e4
        • 2.Ke5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_SPINR(b),OGATE::P(E),XQ(c)
  • Tries
    • Try
      • K(G);S_FLIGHT,XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);XP(E)::QAB(F)
        • Q(c);::QAB(F)
        • Q(c);N_SPINR(b),OGATE::P(E),XQ(c)
        • P(k);N_SPINS(g)::QAB(F)
      • Refutation
        • S(o);CHECK
    • Try
      • B(C);CHECK,XR(b)
      • Refutation
        • P(d);XB(C)
  • Actual
    • Q(F);N_PINS(g)
    • Threat
      • QAB(F)+K(G),XP(j)
    • Vars
      • S(g);CHECK,SBLOCK,S_CUTQ(c)::S(B)
      • S(g);CHECK::QAB(F)+K(G)
      • S(g);CHECK::QAB(F)+K(G),XS(g)
      • Q(c);N_SPINR(b),OGATE::P(E),XQ(c)
      • S(o);::QAB(F)+K(G),XS(o)
      • P(j);::QAB(F)+K(G)
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