MESON Chess Problem Database

Problem Display
PID: 198849 (8/1p2p3/6Q1/3kN3/P1R5/8/1K6/8 w - - 0 1)

Keysor, William Ellis

Brisbane Courier, 1921

8/1p2p3/6Q1/3kN3/P1R5/8/1K6/8

#2

5 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Sg4?
      • 1...e6
        • 2.Qd3#
      • 1...e5
        • 2.Se3#
      • 1...b5
        • 2.Qc6#
      • 1...b6
        • 2.Qc6#
      • 1...Kxc4!
    • 1.Qb6?
      • 1...e6
        • 2.Qd4#
        • 2.Qc5#
      • 1...Kxe5!
  • Keys
    • 1.Sd7!
      • 1...Kxc4
        • 2.Qe4#
      • 1...e6
        • 2.Qd3#
      • 1...e5
        • 2.Sb6#
      • 1...b5
        • 2.Qc6#
      • 1...b6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • P(c);SBLOCK::QAR2(E)
        • P(c);SBLOCK::S(D)
        • P(b);N_GUARD::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(E);
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT,XR(C)::QAR2(E)
      • P(c);SBLOCK::QAR2(E)
      • P(c);SBLOCK::S(D)
      • P(b);N_GUARD::QAB1(E)
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