MESON Chess Problem Database

Problem Display
PID: 101452 (1K6/5R2/1p2B3/1PpRN3/Q2bk3/2p5/5pn1/3Nn3 w - - 0 1)

Sparke, Arthur M

Good Companions (April), 1917

1K6/5R2/1p2B3/1PpRN3/Q2bk3/2p5/5pn1/3Nn3

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sf3
      • 2.Qc2#
    • 1...Se3
      • 2.Sxf2#
      • 2.Sxc3#
  • Tries
    • 1.Rxc5?
      • threat
        • 2.Qa8#
      • 1...Se3
        • 2.Sxf2#
        • 2.Sxc3#
      • 1...Sf4
        • 2.Bf5#
      • 1...bxc5!
    • 1.Qc2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sxc2!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Rxc5#
      • 1...Bxe5+
        • 2.Rd6#
      • 1...Be3
        • 2.Sxc3#
      • 1...Se3
        • 2.Sxf2#
      • 1...Sf4
        • 2.Bf5#
      • 1...c4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD::QAB(B),XS(a)
    • S(a);N_GUARD::QAB(B)
  • Tries
    • Try
      • R(D);XP(g)
      • Threat
        • QAB(B)
      • Vars
        • S(c);SBLOCK::B(F)
      • Refutation
        • P(h);XR(D)
    • Try
      • Q(B);CHECK,N_PINB(e)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • Q(B);N_PINB(e)
    • Threat
      • QAB(B)+R(D),XP(g)
    • Vars
      • B(e);CHECK,SBLOCK,XS(E)::QAB(B)+R(D)
      • B(e);N_GUARD,SBLOCK::S(A),XP(d)
      • S(c);SBLOCK,S_CUTB(e)::S(A),XP(b)
      • S(c);SBLOCK::B(F)
      • P(g);::QAB(B)+R(D)
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