MESON Chess Problem Database

Problem Display
PID: 218496 (7Q/1R6/4N3/2Pk4/3N2P1/8/3K4/8 w - - 0 1)

Mackay, Donald

English Mechanic and World of Science, 1882

(First published on Fri Dec 15 1882)

7Q/1R6/4N3/2Pk4/3N2P1/8/3K4/8

#2

7 + 1

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Se2?
      • 1...Kc4
        • 2.Qd4#
      • 1...Kc6
        • 2.Qh1#
      • 1...Kxe6
        • 2.Sf4#
      • 1...Ke4!
    • 1.Qf6?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kc4!
    • 1.Qh5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kc4!
    • 1.Qh7?
      • 1...Ke5
        • 2.Qf5#
      • 1...Kc4!
    • 1.Qf8?
      • 1...Ke4
        • 2.Qf5#
      • 1...Ke5
        • 2.Qf5#
      • 1...Kc4!
  • Keys
    • 1.Sc6!
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qh1#
      • 1...Kxc6
        • 2.Qh1#
      • 1...Kxe6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAR1(G)
        • K(a);S_FLIGHT::QAB(G)
        • K(a);S_FLIGHT,XS(E)::S(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(a);S_FLIGHT::QAB1(G)
        • K(a);P-FLIGHT::QAR1(G)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(a);S_FLIGHT::QAR1(G)
      • K(a);S_FLIGHT::QAB(G)
      • K(a);S_FLIGHT,XS(B)::QAB(G)
      • K(a);S_FLIGHT,XS(E)::QAR1(G)
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