MESON Chess Problem Database

Problem Display
PID: 48880 (3K4/Q2B4/2p1p3/3k4/R2P3N/2B1P3/8/7R w - - 0 1)

Lundberg, T

Dubuque Chess Journal, 1891

3K4/Q2B4/2p1p3/3k4/R2P3N/2B1P3/8/7R

#2

9 + 3

459 Nebraska Chess Bulletin 1951

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc5#
  • Tries
    • 1.Bxc6+?
      • 1...Kd6
        • 2.Qc5#
        • 2.Qc7#
        • 2.Qd7#
      • 1...Kxc6!
    • 1.Qb6?
      • threat
        • 2.Qxc6#
      • 1...Kd6
        • 2.Qc5#
        • 2.Qxc6#
      • 1...c5
        • 2.Qc6#
        • 2.Qxe6#
      • 1...Ke4!
    • 1.Qb8?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Ke4!
    • 1.Qa6?
      • threat
        • 2.Qxc6#
      • 1...Kd6
        • 2.Qxc6#
      • 1...c5
        • 2.Qc6#
        • 2.Qxe6#
      • 1...Ke4!
    • 1.Qb7?
      • threat
        • 2.Qxc6#
      • 1...Kd6
        • 2.Qxc6#
      • 1...Ke4!
    • 1.Qc7?
      • threat
        • 2.Bxc6#
        • 2.Qe5#
        • 2.Qxc6#
      • 1...e5
        • 2.Qxe5#
        • 2.Qxc6#
      • 1...c5
        • 2.Bc6#
        • 2.Qe5#
        • 2.Qc6#
      • 1...Ke4!
    • 1.Qa8?
      • threat
        • 2.Qxc6#
      • 1...Kd6
        • 2.Qxc6#
      • 1...Ke4!
    • 1.e4+?
      • 1...Kd6
        • 2.Qc5#
        • 2.Qb8#
        • 2.Qc7#
      • 1...Kxe4!
  • Keys
    • 1.Rd1!
      • 1...Ke4
        • 2.d5#
      • 1...Kd6
        • 2.Qc5#
      • 1...e5
        • 2.dxe5#
      • 1...c5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAB1(G)
  • Tries
    • Try
      • B(H);CHECK,XP(b)
      • Refutation
        • K(a);S_FLIGHT,XB(H)
    • Try
      • Q(G);
      • Threat
        • QAB1(G),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(c);::QAR1(G),XP(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAB1(G),XP(b)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR1(G),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);P_PINP(b)
      • Threat
        • QAB1(G),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(G),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);P_PINP(b)
      • Threat
        • QAB1(G),XP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(G),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(C)
  • Actual
    • R(A);
    • Vars
      • K(a);OGATE,S_FLIGHT::R(D)+P(E)
      • K(a);P-FLIGHT::QAB1(G)
      • P(c);OGATE::R(A)+P(E),XP(c)
      • P(b);OGATE::R(A)+P(E),XP(b)
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