MESON Chess Problem Database

Problem Display
PID: 4500 (8/4N3/3P4/2PBk3/8/p6N/K4Qn1/5n2 w - - 0 1)

Shinkman, William Anthony

Dubuque Chess Journal, 1871

8/4N3/3P4/2PBk3/8/p6N/K4Qn1/5n2

#2

7 + 4

3925 The Golden Argosy 1929
5501 Chess Cameos 1936
3310 2345 Chess Problems 1997
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Se1
      • 2.Qf4#
    • 1...Se3
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sh4
      • 2.Qf4#
  • Tries
    • 1.Qxf1?
      • threat
        • 2.Qa1#
      • 1...Se1
        • 2.Qf4#
      • 1...Kd4!
    • 1.Qc2?
      • threat
        • 2.Qc3#
      • 1...Kf6
        • 2.Qc3#
      • 1...Kd4!
    • 1.Qd2?
      • threat
        • 2.Qc3#
      • 1...Kf6
        • 2.Qc3#
        • 2.Qg5#
        • 2.Qd4#
      • 1...Sxd2!
    • 1.Qf3?
      • threat
        • 2.Sc6#
        • 2.Qc3#
      • 1...Sf4
        • 2.Qc3#
        • 2.Qxf4#
      • 1...Sfe3
        • 2.Sc6#
      • 1...Sge3
        • 2.Sc6#
        • 2.Qf4#
      • 1...Kd4!
  • Keys
    • 1.Qg1!
      • 1...Kf6
        • 2.Qd4#
      • 1...Sfe3
        • 2.Qa1#
      • 1...Sge3
        • 2.Qg7#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sh2
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...Se1
        • 2.Qg7#
      • 1...Sf4
        • 2.Qg7#
      • 1...Sh4
        • 2.Qg7#

This anticipates 230671(1879), 102776(1909), 140872(1953), 163022(2014)

This is a version of 4501

There are these afters: 75986

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAB1(B)
    • S(b);N_GUARD::QAB1(B),XS(b)
  • Tries
    • Try
      • Q(B);XS(a)
      • Threat
        • QAB(B)
      • Vars
        • S(b);N_GUARD::QAB1(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Vars
        • K(d);S_FLIGHT::QAB(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB(B)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(G)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(d);S_FLIGHT::QAB(B)
      • S(a);OGATE::QAB(B)
      • S(b);OGATE::QAB(B)
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