MESON Chess Problem Database

Problem Display
PID: 2117 (4R3/4n3/5N1K/1Rp1k3/3N4/8/1Q1P4/8 w - - 0 1)

Brown, Theodore Morris

Source?, 0000

4R3/4n3/5N1K/1Rp1k3/3N4/8/1Q1P4/8

#2

7 + 3

1679 American Chess Nuts 1868

SOLUTION

  • SOUND
  • Tries
    • 1.Ra5?
      • 1...Kf4
        • 2.Qb8#
      • 1...Kd6
        • 2.Qb8#
      • 1...Kxf6!
    • 1.Rxc5+?
      • 1...Kf4
        • 2.Qb8#
      • 1...Kxf6
        • 2.Rf8#
      • 1...Kd6!
    • 1.Qa3?
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd6
        • 2.Qxc5#
        • 2.Qg3#
      • 1...Kxf6!
    • 1.Qc3?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd6
        • 2.Qg3#
        • 2.Qxc5#
      • 1...Kxf6!
  • Keys
    • 1.Qb3!
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd6
        • 2.Qg3#
      • 1...Kxf6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT::QAB(A)
      • Refutation
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT,XS(E)
    • Try
      • R(D);CHECK,XP(a)
      • Vars
        • K(b);N_SPINS(c),S_FLIGHT::QAB(A)
        • K(b);N_SPINS(c),S_FLIGHT,XS(E)::R(G)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),OGATEB,S_FLIGHT,XS(C)::QAB1(A)
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT,XS(E)
    • Try
      • Q(A);
      • Vars
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT::QAB1(A)
      • Refutation
        • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT,XS(E)
  • Actual
    • Q(A);
    • Vars
      • K(b);N_SPINP(a),N_SPINS(c),OGATEB,S_FLIGHT,XS(C)::QAB1(A)
      • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT::QAB1(A)
      • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT::QAB(A)
      • K(b);N_SPINP(a),N_SPINS(c),S_FLIGHT,XS(E)::QAR1(A)
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