MESON Chess Problem Database

Problem Display
PID: 223394 (8/1pB5/1pp5/1kN5/8/3KP3/4Q3/8 w - - 0 1)

Lyons, William Henry

The Nashville Union, 1885

8/1pB5/1pp5/1kN5/8/3KP3/4Q3/8

#2

5 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Kc3+?
      • 1...Kxc5
        • 2.Qc4#
        • 2.Qh5#
      • 1...Ka5!
    • 1.Bxb6?
      • threat
        • 2.Qb2#
      • 1...Kb4
        • 2.Qb2#
      • 1...Kxb6!
    • 1.Qe1?
      • 1...bxc5
        • 2.Qa5#
      • 1...Kxc5!
    • 1.Qa2?
      • 1...Kxc5
        • 2.Qc4#
      • 1...bxc5
        • 2.Qc4#
        • 2.Qa5#
      • 1...Kb4!
    • 1.Qb2+?
      • 1...Ka5
        • 2.Bxb6#
        • 2.Qxb6#
      • 1...Kxc5!
    • 1.Qc2?
      • 1...Ka5
        • 2.Qa4#
      • 1...bxc5
        • 2.Qc4#
      • 1...Kb4!
    • 1.Qd2?
      • 1...bxc5
        • 2.Qa5#
      • 1...Kxc5!
  • Keys
    • 1.Qg4!
      • 1...Ka5
        • 2.Qa4#
      • 1...Kxc5
        • 2.Qc4#
      • 1...bxc5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);CHECK,P-FLIGHT
      • Refutation
        • K(a);P-FLIGHT,P_SPINP(b)
    • Try
      • B(E);XP(b)
      • Threat
        • QAR(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT,XB(E)
    • Try
      • Q(A);
      • Vars
        • P(b);N_GUARD,SBLOCK,XS(D)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT,XS(D)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR1(A)
        • P(b);XS(D)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(b);N_GUARD,SBLOCK,XS(D)::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT,P_SPINP(b)::QAR1(A)
      • K(a);P-FLIGHT,XS(D)::QAR1(A)
      • P(b);XS(D)::QAB1(A)
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