MESON Chess Problem Database

Problem Display
PID: 154781 (8/8/8/4pp2/1n6/1Qbp1B2/1nrPNB2/RN1k3K w - - 0 1)

Sparke, Arthur M

Good Companions (May), 1916

8/8/8/4pp2/1n6/1Qbp1B2/1nrPNB2/RN1k3K

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd2
      • 2.Sbc3#
  • Tries
    • 1.Be1?
      • threat
        • 2.Sa3#
        • 2.Sbxc3#
      • 1...Bxd2
        • 2.Sxd2#
        • 2.Sbc3#
      • 1...Bd4
        • 2.Sa3#
        • 2.Sbc3#
      • 1...Sa4
        • 2.Sbxc3#
      • 1...Sc4
        • 2.Sbxc3#
      • 1...Sa2
        • 2.Sbxc3#
      • 1...Kxe1!
    • 1.Be3?
      • threat
        • 2.Sa3#
        • 2.Sbxc3#
      • 1...Bxd2
        • 2.Sxd2#
        • 2.Sbc3#
      • 1...Bd4
        • 2.Sa3#
        • 2.Sbc3#
      • 1...Sa4
        • 2.Sbxc3#
      • 1...Sc4
        • 2.Sbxc3#
      • 1...Sa2
        • 2.Sbxc3#
      • 1...Ke1!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qg1#
      • 1...Rxd2
        • 2.Sa3#
      • 1...Bxd2
        • 2.Sbc3#
      • 1...Rc1
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(d);SBLOCK,XP(D)::R(A)+S(B),DCHECK
  • Tries
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::R(A)+S(B),DCHECK,XB(d)
        • S(f);::R(A)+S(B),DCHECK,XB(d)
      • Refutation
        • K(a);N_SPINR(c),P-FLIGHT,XB(F)
    • Try
      • B(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::R(A)+S(B),DCHECK,XB(d)
        • S(f);::R(A)+S(B),DCHECK,XB(d)
      • Refutation
        • K(a);N_SPINR(c),P-FLIGHT
  • Actual
    • Q(G);N_PINR(c)
    • Threat
      • QAR(G)
    • Vars
      • R(c);N_GUARD,SBLOCK,XP(D)::R(A)+S(B)
      • B(d);SBLOCK,XP(D)::R(A)+S(B),DCHECK
      • R(c);SBLOCK::B(H)+S(E)
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