MESON Chess Problem Database

Problem Display
PID: 208747 (Q7/3N4/8/3p1p2/1p2k3/1P3R2/3P3P/5K2 w - - 0 1)

Thornton, George Howard

Detroit Free Press, 1875

Q7/3N4/8/3p1p2/1p2k3/1P3R2/3P3P/5K2

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Ke2?
      • 1...Kd4
        • 2.Rf4#
      • 1...f4!
    • 1.Re3+?
      • 1...Kd4
        • 2.Qa1#
        • 2.Qa7#
        • 2.Qh8#
      • 1...Kf4!
    • 1.Qa6?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Rf4#
        • 2.Qd3#
      • 1...d4
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qa8#
      • 1...Kxf3!
    • 1.Qb8?
      • threat
        • 2.Qf4#
      • 1...Kd4
        • 2.Qf4#
        • 2.Qe5#
        • 2.Qxb4#
      • 1...f4
        • 2.Qxf4#
      • 1...d4
        • 2.Qb7#
        • 2.Qa8#
      • 1...Kxf3!
    • 1.Qe8+?
      • 1...Kd4
        • 2.Qe3#
        • 2.Qe5#
      • 1...Kxf3!
    • 1.d3+?
      • 1...Kd4
        • 2.Qa1#
        • 2.Qh8#
      • 1...Kxf3!
  • Keys
    • 1.Qf8!
      • 1...Kxf3
        • 2.Qxf5#
      • 1...Kd4
        • 2.Qxb4#
      • 1...d4
        • 2.Qxf5#
        • 2.Qa8#
      • 1...f4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::R(E)
      • Refutation
        • P(d);
    • Try
      • R(E);CHECK
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • Q(G);N_PINP(c)
      • Threat
        • QAB1(G)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • Q(G);N_PINP(c)
      • Threat
        • QAR1(G)
      • Vars
        • P(d);::QAR1(G),XP(d)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • Q(G);CHECK,N_PINP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • P(B);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(E)
  • Actual
    • Q(G);N_PINP(c)
    • Vars
      • K(b);P_SPINP(d),S_FLIGHT,XR(E)::QAR2(G),XP(d)
      • K(b);P-FLIGHT::QAR2(G),XP(a)
      • P(d);OGATE::QAR1(G),XP(d)
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