MESON Chess Problem Database

Problem Display
PID: 101044 (2Q1N3/2P1k1PK/7n/8/5P2/8/8/8 w - - 0 1)

Keysor, William Ellis

Good Companions (May Meredith Ty.), 1917

2Q1N3/2P1k1PK/7n/8/5P2/8/8/8

#2

6 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf7
      • 2.Qd7#
  • Tries
    • 1.Qd8+?
      • 1...Kf7
        • 2.Qd7#
      • 1...Ke6!
    • 1.f5?
      • threat
        • 2.Qe6#
      • 1...Kf7
        • 2.Qe6#
        • 2.Qd7#
      • 1...Sxf5!
    • 1.g8S+?
      • 1...Kf7
        • 2.Sd6#
      • 1...Kf8
        • 2.Sd6#
      • 1...Sxg8!
  • Keys
    • 1.Qb7!
      • threat
        • 2.c8Q#
      • 1...Ke6
        • 2.c8Q#
        • 2.c8B#
      • 1...Kd7
        • 2.c8Q#
      • 1...Kf7
        • 2.c8Q#
      • 1...Kxe8
        • 2.c8Q#
        • 2.c8R#

This anticipates 17760(1949)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(A);
      • Threat
        • QAR1(E)
      • Refutation
        • S(a);XP(A)
    • Try
      • P(C);CHECK
      • Vars
        • K(b);P-FLIGHT::S(F)
        • K(b);S_FLIGHT::QAR(E)+S(F)
      • Refutation
        • S(a);XS(C)
  • Actual
    • Q(E);
    • Threat
      • P=Q
    • Vars
      • K(b);P-FLIGHT::P=Q
      • K(b);P-FLIGHT,XS(F)::P=Q
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