MESON Chess Problem Database

Problem Display
PID: 222458 (5K2/B5Q1/8/1P1kN3/P7/1n6/B3P3/8 w - - 0 1)

Lyons, William Henry

Nashville Daily American, 1884

5K2/B5Q1/8/1P1kN3/P7/1n6/B3P3/8

#2

8 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sf7?
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6!
    • 1.Bxb3+?
      • 1...Kd6
        • 2.Qe7#
      • 1...Ke4!
    • 1.e4+?
      • 1...Kd6
        • 2.Qe7#
      • 1...Ke6
        • 2.Qe7#
      • 1...Kxe4!
  • Keys
    • 1.Sc4!
      • 1...Kxc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6
        • 2.Qf7#
      • 1...Sa1
        • 2.Qe5#
      • 1...Sc1
        • 2.Qe5#
      • 1...Sd2
        • 2.Qe5#
      • 1...Sd4
        • 2.Qe5#
      • 1...Sa5
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • K(b);S_FLIGHT::QAR1(G)
        • K(b);N_SPINS(a),S_FLIGHT::QAR1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);CHECK,XS(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(b);N_SPINS(a),P-FLIGHT::QAB1(G)
        • K(b);S_FLIGHT::QAR1(G)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT,XP(B)
  • Actual
    • S(E);N_PINS(a)
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT,XS(E)::QAR1(G)
      • K(b);S_FLIGHT::QAR1(G)
      • K(b);S_FLIGHT::QAB1(G)
      • S(a);::QAR1(G)
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