MESON Chess Problem Database

Problem Display
PID: 9489 (8/8/1PR1PB2/n2k2p1/b5B1/1R3N2/2P1Q3/3K4 w - - 0 1)

Heathcote, Godfrey

Kingstown Society, 1904

8/8/1PR1PB2/n2k2p1/b5B1/1R3N2/2P1Q3/3K4

#2

10 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sxb3
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...Sb7
      • 2.Qc4#
  • Tries
    • 1.Rc5+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Kxc5!
    • 1.Qb5+?
      • 1...Ke4
        • 2.Qe5#
        • 2.Qf5#
      • 1...Bxb5!
    • 1.Qd2+?
      • 1...Ke4
        • 2.Sxg5#
        • 2.Qd4#
      • 1...Kxc6!
    • 1.c4+?
      • 1...Sxc4
        • 2.Qxc4#
      • 1...Kxc6!
  • Keys
    • 1.Be7!
      • threat
        • 2.Rc5#
      • 1...Kxc6
        • 2.Qe4#
      • 1...Bxc6
        • 2.Qd3#
      • 1...Sxb3
        • 2.Qc4#
      • 1...Sxc6
        • 2.c4#
      • 1...Sb7
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD,XR(D)::QAB1(C)
    • S(b);N_GUARD::QAB1(C),XS(b)
    • S(b);N_GUARD::QAB1(C)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(C)
      • Refutation
        • K(c);P-FLIGHT,XR(H)
    • Try
      • Q(C);CHECK
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);S_FLIGHT,XR(H)
    • Try
      • P(B);CHECK,P_SPINR(D)
      • Vars
        • S(b);OGATE,XP(B)::QAB1(C),XS(b)
      • Refutation
        • K(c);S_FLIGHT,XR(H)
  • Actual
    • B(J);
    • Threat
      • R1(H)
    • Vars
      • K(c);S_FLIGHT,XR(H)::QAB(C)
      • B(a);SBLOCK,XR(H)::QAR2(C)
      • S(b);N_GUARD,XR(D)::QAB1(C)
      • S(b);N_GUARD,SBLOCK,XR(H)::P(B)
      • S(b);N_GUARD::QAB1(C)
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