MESON Chess Problem Database

Problem Display
PID: 193342 (1brR2B1/2pn1N2/n6R/p2kB1P1/q1p1N3/1p4K1/b1p5/7Q w - - 0 1)

Sparke, Arthur M

1st Prize, Four-Leaved Shamrock, 1914

1brR2B1/2pn1N2/n6R/p2kB1P1/q1p1N3/1p4K1/b1p5/7Q

#2

9 + 12

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Sc3#
    • 1...c5
      • 2.Sd2#
      • 2.Sf2#
      • 2.Sc3#
      • 2.Sed6#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Se5#
        • 2.Sh8#
      • 1...c5+
        • 2.Sed6#
        • 2.Se5#
      • 1...c6+
        • 2.Se5#
        • 2.Sfd6#
      • 1...Rxd8
        • 2.Sxd8#
      • 1...Qc6
        • 2.Sfd6#
      • 1...Sc5!
  • Keys
    • 1.Bg7!
      • threat
        • 2.Sh8#
      • 1...c5+
        • 2.Sed6#
      • 1...c6+
        • 2.Sfd6#
      • 1...Rxd8
        • 2.Sxd8#
      • 1...Sc5
        • 2.Sc3#
      • 1...Qc6
        • 2.Sfd6#

This is a version of 20922

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(h);SBLOCK::QAB(A)+S(C),DCHECK
  • Tries
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(l);N_SPINS(j),XR(H)::B(I)+S(G),XR(l)
        • Q(d);SBLOCK::B(I)+S(G)
      • Refutation
        • S(h);
  • Actual
    • B(D);
    • Threat
      • B(I)+S(G)
    • Vars
      • P(i);CHECK,SBLOCK::QAB(A)+S(C)
      • P(i);CHECK,SBLOCK::B(I)+S(G)
      • R(l);N_SPINS(j),XR(H)::B(I)+S(G),XR(l)
      • S(h);SBLOCK::QAB(A)+S(C),DCHECK
      • Q(d);SBLOCK::B(I)+S(G)
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Developed and maintained by Brian Stephenson.
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