MESON Chess Problem Database

Problem Display
PID: 101387 (8/8/8/7K/2N1QR2/1bp5/4N2n/R2qk1B1 w - - 0 1)

Sparke, Arthur M

Good Companions, 1919

8/8/8/7K/2N1QR2/1bp5/4N2n/R2qk1B1

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa1
      • 2.Sxc3#
    • 1...Qb1
      • 2.Sxc3#
    • 1...Qc1
      • 2.Sxc3#
    • 1...Sf1
      • 2.Bf2#
    • 1...Sf3
      • 2.Sg3#
  • Tries
    • 1.Bxh2?
      • threat
        • 2.Bg3#
      • 1...Qxa1
        • 2.Sxc3#
      • 1...Qb1
        • 2.Sxc3#
      • 1...Qc1
        • 2.Sxc3#
      • 1...Bxc4!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Bxc3#
      • 1...Qxa1
        • 2.Sxc3#
      • 1...Qb1
        • 2.Sxc3#
      • 1...Qc1
        • 2.Sxc3#
      • 1...Sf3
        • 2.Sg3#
      • 1...Sf1
        • 2.Bf2#
      • 1...c2
        • 2.Bc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(a);N_PINS(C),N_SPINQ(a),XR(A)::QAR(E)+S(C),XP(e)
    • Q(a);N_PINS(C)::QAR(E)+S(C),XP(e)
    • S(c);SBLOCK::B(B)
    • S(c);N_PINS(C)::QAR(E)+S(C)
  • Tries
    • Try
      • B(B);XS(c)
      • Threat
        • B(B)
      • Vars
        • Q(a);N_PINS(C),N_SPINQ(a),XR(A)::QAR(E)+S(C),XP(e)
        • Q(a);N_PINS(C)::QAR(E)+S(C),XP(e)
      • Refutation
        • B(d);XS(D)
  • Actual
    • B(B);
    • Threat
      • B(B),XP(e)
    • Vars
      • Q(a);N_PINS(C),N_SPINQ(a),XR(A)::QAR(E)+S(C),XP(e)
      • Q(a);N_PINS(C)::QAR(E)+S(C),XP(e)
      • S(c);N_PINS(C)::QAR(E)+S(C)
      • S(c);SBLOCK::B(B)
      • P(e);::B(B)
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