MESON Chess Problem Database

Problem Display
PID: 207004 (8/7Q/3P1N1P/4k3/3N3P/8/3K4/8 w - - 0 1)

Tanner, James Alfred

Chess Monthly, 1860

8/7Q/3P1N1P/4k3/3N3P/8/3K4/8

#2

7 + 1

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf6
      • 2.Qf5#
      • 2.Qg7#
  • Tries
    • 1.Ke3?
      • threat
        • 2.Qe7#
      • 1...Kxf6
        • 2.Qf5#
        • 2.Qg7#
      • 1...Kxd6!
    • 1.Qd3?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kxf6
        • 2.Qf5#
      • 1...Kxd6!
    • 1.Qe4+?
      • 1...Kxf6
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kxd6!
    • 1.Qf5+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kxd6!
    • 1.Qg8?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kf4
        • 2.Qg5#
      • 1...Kxf6
        • 2.Qe6#
        • 2.Qg7#
      • 1...Kxd6!
    • 1.Qe7+?
      • 1...Kf4
        • 2.Qe3#
      • 1...Kxd4!
  • Keys
    • 1.Qc7!
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kf4
        • 2.d7#
      • 1...Kxf6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • QAR2(G)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB1(G)
        • K(a);S_FLIGHT,XS(E)::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(B)::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT,XS(B)::QAR1(G)
        • K(a);S_FLIGHT::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT,XP(D)
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
  • Actual
    • Q(G);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(G)
      • K(a);S_FLIGHT::QAB(G)+P(D)
      • K(a);OGATEB,S_FLIGHT,XS(E)::QAB1(G)
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