MESON Chess Problem Database

Problem Display
PID: 149067 (1N6/8/1p2K3/k7/r1p5/2P5/5Q2/8 w - - 0 1)

Keysor, William Ellis

Good Companions (May Meredith Ty.), 1918

1N6/8/1p2K3/k7/r1p5/2P5/5Q2/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kb5
      • 2.Qf5#
    • 1...b5
      • 2.Qa7#
  • Tries
    • 1.Qc5+?
      • 1...b5
        • 2.Qa7#
        • 2.Qc7#
      • 1...bxc5!
    • 1.Qb2?
      • 1...Ra1
        • 2.Qb4#
      • 1...Ra2
        • 2.Qb4#
      • 1...Ra3
        • 2.Qb4#
      • 1...Rb4
        • 2.Qxb4#
      • 1...b5!
  • Keys
    • 1.Qf8!
      • 1...Kb5
        • 2.Qf5#
      • 1...Ra1
        • 2.Qb4#
      • 1...Ra2
        • 2.Qb4#
      • 1...Ra3
        • 2.Qb4#
      • 1...Rb4
        • 2.Qxb4#
      • 1...b5
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR(A)
    • P(d);OGATE,SBLOCK::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);
      • Vars
        • R(a);N_GUARD::QAB1(A)
        • R(a);N_GUARD::QAB1(A),XR(a)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT::QAR(A)
      • R(a);N_GUARD::QAB1(A)
      • R(a);N_GUARD::QAB1(A),XR(a)
      • P(d);OGATEB,SBLOCK::QAB(A)
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