MESON Chess Problem Database

Problem Display
PID: 146138 (2K5/2Q5/8/1p6/1p6/1nNkP3/2qN3R/nB2R3 w - - 0 1)

Sparke, Arthur M

1st Prize, Surrey Weekly Press, 1920

2K5/2Q5/8/1p6/1p6/1nNkP3/2qN3R/nB2R3

#2

8 + 6

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...bxc3
      • 2.Qh7#
  • Tries
    • 1.Sxb3?
      • threat
        • 2.Sc1#
        • 2.Rd2#
      • 1...Qxb1
        • 2.Rd2#
      • 1...Sxb3
        • 2.Bxc2#
      • 1...bxc3!
    • 1.Sa2?
      • threat
        • 2.Sxb4#
      • 1...Sc5
        • 2.Qd6#
      • 1...Sxd2!
    • 1.Sa4?
      • threat
        • 2.Sb2#
      • 1...Qxb1
        • 2.Qh7#
      • 1...bxa4
        • 2.Qc4#
      • 1...Sc5
        • 2.Qd6#
      • 1...Sxd2!
    • 1.Qe5?
      • 1...Sxd2
        • 2.Qd4#
      • 1...bxc3
        • 2.Qe4#
        • 2.Qxb5#
        • 2.Qf5#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...Qxb1!
    • 1.Qd6+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Kxc3!
    • 1.Qd8+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Kxc3!
    • 1.Qd7+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Kxc3!
    • 1.Qg7?
      • 1...Sxd2
        • 2.Qd4#
      • 1...bxc3
        • 2.Qg6#
        • 2.Qh7#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Sc5
        • 2.Qd4#
      • 1...Qxb1!
  • Keys
    • 1.Sd1!
      • threat
        • 2.Sb2#
      • 1...Qxb1
        • 2.Qh7#
      • 1...Sxd2
        • 2.Sf2#
      • 1...Sc5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(e);SBLOCK,XS(E)::QAB(G)
  • Tries
    • Try
      • S(C);XS(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);N_SPINQ(b),XB(A)::R1(D)
        • S(a);N_GUARD,XS(C)::B(A),XQ(b)
      • Refutation
        • P(e);XS(E)
    • Try
      • S(E);P_SPINQ(G)
      • Threat
        • S(E),XP(e)
      • Vars
        • S(c);N_PINQ(G)::QAR(G)
      • Refutation
        • S(c);XS(C)
    • Try
      • S(E);P_SPINQ(G)
      • Threat
        • S(E)
      • Vars
        • Q(b);N_PINQ(G),N_SPINQ(b),XB(A)::QAB(G)
        • P(f);N_GUARD,XS(E)::QAB1(G)
        • S(c);N_PINQ(G)::QAR(G)
      • Refutation
        • S(c);XS(C)
    • Try
      • Q(G);P_SPINS(E)
      • Vars
        • S(c);N_GUARD,XS(C)::QAR1(G)
        • S(c);N_GUARD::QAR1(G),XS(c)
        • S(c);N_GUARD::QAR1(G)
        • S(c);N_GUARD,N_PINS(E)::QAR1(G)
      • Refutation
        • Q(b);N_PINS(E),N_SPINQ(b),XB(A)
    • Try
      • Q(G);CHECK,P_SPINS(E)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(G),XS(c)
      • Refutation
        • K(d);N_SPINQ(b),P-FLIGHT,XS(E)
    • Try
      • Q(G);CHECK,P_SPINS(E)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(G),XS(c)
      • Refutation
        • K(d);N_SPINQ(b),P-FLIGHT,XS(E)
    • Try
      • Q(G);CHECK,P_SPINS(E)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(G),XS(c)
      • Refutation
        • K(d);N_SPINQ(b),P-FLIGHT,XS(E)
    • Try
      • Q(G);P_SPINS(E)
      • Vars
        • S(c);N_GUARD,XS(C)::QAR1(G)
        • S(c);N_GUARD::QAR1(G),XS(c)
        • S(c);N_GUARD::QAR1(G)
        • S(c);N_GUARD,N_PINS(E)::QAR1(G)
      • Refutation
        • Q(b);N_PINS(E),N_SPINQ(b),XB(A)
  • Actual
    • S(E);P_SPINQ(G)
    • Threat
      • S(E)
    • Vars
      • Q(b);N_PINQ(G),N_SPINQ(b),XB(A)::QAB(G)
      • S(c);SBLOCK,XS(C)::S(E)
      • S(c);N_PINQ(G)::QAR(G)
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