MESON Chess Problem Database

Problem Display
PID: 101376 (R7/8/8/4p3/1k4n1/Nq3QK1/1R2B3/3b2B1 w - - 0 1)

Sparke, Arthur M

Good Companions, 1919

R7/8/8/4p3/1k4n1/Nq3QK1/1R2B3/3b2B1

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc2
      • 2.Sxc2#
    • 1...Bxe2
      • 2.Rxb3#
      • 2.Qxb3#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qc3#
      • 1...Bxe2
        • 2.Qxb3#
      • 1...Se3
        • 2.Qf8#
      • 1...Qxb2!
    • 1.Bd4?
      • threat
        • 2.Qc3#
      • 1...Qxb2
        • 2.Qb7#
      • 1...Se3
        • 2.Qb7#
        • 2.Qf8#
      • 1...exd4!
  • Keys
    • 1.Sb1!
      • threat
        • 2.Qc3#
      • 1...Qxb2
        • 2.Qb7#
      • 1...Bxe2
        • 2.Qxb3#
      • 1...Se3
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::S(D),XB(a)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB1(E)
      • Vars
        • B(a);N_GUARD,XB(C)::QAR1(E),XQ(b)
        • S(d);N_PINQ(E)::QAB(E)
      • Refutation
        • Q(b);N_PINQ(E),N_SPINQ(b),XR(B)
    • Try
      • B(A);
      • Threat
        • QAB1(E)
      • Vars
        • Q(b);N_PINQ(E),N_SPINQ(b),XR(B)::QAR(E)
      • Refutation
        • P(e);XB(A)
  • Actual
    • S(D);
    • Threat
      • QAB1(E)
    • Vars
      • Q(b);N_PINQ(E),N_SPINQ(b),XR(B)::QAR(E)
      • B(a);N_GUARD,XB(C)::QAR1(E),XQ(b)
      • S(d);N_PINQ(E)::QAB(E)
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