MESON Chess Problem Database

Problem Display
PID: 195080 (8/3N4/2P5/3k1N2/6B1/3n4/P1bR3Q/2R4K w - - 0 1)

McIlvane, John A

Pittsburgh Gazette-Times, 1918

8/3N4/2P5/3k1N2/6B1/3n4/P1bR3Q/2R4K

#2

9 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sf6#
    • 1...Bb1
      • 2.Qe5#
    • 1...Bd1
      • 2.Qe5#
    • 1...Bb3
      • 2.Qe5#
    • 1...Ba4
      • 2.Qe5#
  • Tries
    • 1.Sd6?
      • 1...Kd4
        • 2.Qe5#
      • 1...Bb1
        • 2.Qe5#
      • 1...Bd1
        • 2.Rxd3#
        • 2.Qe5#
      • 1...Bb3
        • 2.Rxd3#
        • 2.Qe5#
      • 1...Ba4
        • 2.Rxd3#
        • 2.Qe5#
      • 1...Kxc6!
    • 1.Rcxc2?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Sf6#
      • 1...Ke6!
    • 1.Qf4?
      • threat
        • 2.Se7#
      • 1...Ke6
        • 2.Qc4#
      • 1...Kxc6!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Sf6#
        • 2.Re2#
        • 2.Qd4#
      • 1...Kc4!
  • Keys
    • 1.Qb8!
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Sf6#
      • 1...Kxc6
        • 2.Se7#
      • 1...Ke6
        • 2.Qg8#
      • 1...Bb1
        • 2.Qe5#
      • 1...Bd1
        • 2.Qe5#
      • 1...Bb3
        • 2.Qe5#
      • 1...Ba4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINS(b),S_FLIGHT::S(I)
    • B(a);::QAR1(E)
  • Tries
    • Try
      • S(G);
      • Vars
        • K(c);P-FLIGHT::QAB1(E)
        • B(a);::QAR1(E)
      • Refutation
        • K(c);N_SPINS(b),P_SPINB(a),S_FLIGHT,XP(H)
    • Try
      • R(A);XB(a)
      • Threat
        • QAR1(E)
      • Vars
        • K(c);N_SPINS(b),S_FLIGHT::S(I)
      • Refutation
        • K(c);N_SPINS(b),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • S(G)
      • Vars
        • K(c);N_SPINS(b),S_FLIGHT::QAB(E)
      • Refutation
        • K(c);N_SPINS(b),P_SPINB(a),S_FLIGHT,XP(H)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);N_SPINS(b),P_SPINB(a),S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(c);N_SPINS(b),P_SPINB(a),S_FLIGHT::QAB1(E)
      • K(c);N_SPINS(b),S_FLIGHT::S(I)
      • K(c);N_SPINS(b),P_SPINB(a),S_FLIGHT,XP(H)::S(G)
      • K(c);N_SPINS(b),S_FLIGHT::QAB(E)
      • B(a);::QAR1(E)
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