MESON Chess Problem Database

Problem Display
PID: 58427 (8/1K2p3/2N3Q1/p1k1P3/2p5/2N5/pp4p1/R7 w - - 0 1)

Lyons, William Henry

Source?, 0000

8/1K2p3/2N3Q1/p1k1P3/2p5/2N5/pp4p1/R7

#2

6 + 7

15 British Chess Magazine 1886

SOLUTION

  • SOUND
  • Sets
    • 1...g1Q
      • 2.Qxg1#
    • 1...g1S
      • 2.Qxg1#
    • 1...g1B
      • 2.Qxg1#
    • 1...g1R
      • 2.Qxg1#
  • Tries
    • 1.Sa4+?
      • 1...Kd5
        • 2.Rd1#
      • 1...Kb5!
    • 1.Se4+?
      • 1...Kd5
        • 2.Rd1#
      • 1...Kb5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qg1#
      • 1...axb1Q
        • 2.Rxa5#
      • 1...axb1S
        • 2.Rxa5#
      • 1...axb1B
        • 2.Rxa5#
      • 1...axb1R
        • 2.Rxa5#
      • 1...bxa1Q
        • 2.Qb5#
        • 2.Qb6#
      • 1...bxa1R
        • 2.Qb5#
        • 2.Qb6#
      • 1...g1Q
        • 2.Qxg1#
      • 1...g1S
        • 2.Qxg1#
      • 1...g1B
        • 2.Qxg1#
      • 1...g1R
        • 2.Qxg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::QAB(E),XQ(c)
    • P(c);OGATE::QAB(E),XS(c)
    • P(c);OGATE::QAB(E),XB(c)
    • P(c);OGATE::QAB(E),XR(c)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(f);P-FLIGHT::R(A)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(f);P-FLIGHT::R(A)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • P(a);OGATE,XQ(E)::R(A),XP(e)
      • P(c);::QAB(E),XQ(c)
      • P(c);::QAB(E),XS(c)
      • P(c);::QAB(E),XB(c)
      • P(c);::QAB(E),XR(c)
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