MESON Chess Problem Database

Problem Display
PID: 10468 (8/7N/8/5P1P/2Q1pNk1/6P1/2p4P/2B3K1 w - - 0 1)

Quack, Godfrey C

4th Place, The Problemist (Our Own Composers), 1964

8/7N/8/5P1P/2Q1pNk1/6P1/2p4P/2B3K1

#2

9 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qe2#
    • 1...Kxf5
      • 2.Qe6#
  • Tries
    • 1.Kf1?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxf5
        • 2.Qe6#
      • 1...e3!
    • 1.Kh1?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxf5
        • 2.Qe6#
      • 1...e3!
    • 1.Kf2?
      • 1...Kxf5
        • 2.Qe6#
      • 1...e3+!
    • 1.Kg2?
      • 1...Kxf5
        • 2.Qe6#
      • 1...e3!
    • 1.Sg6?
      • 1...Kf3
        • 2.Se5#
      • 1...Kxf5
        • 2.Qc8#
      • 1...Kxh5
        • 2.Sf6#
        • 2.Qe2#
      • 1...Kh3!
    • 1.Qb3?
      • 1...Kxf5
        • 2.Qe6#
      • 1...e3!
    • 1.Qb5?
      • 1...Kf3
        • 2.Qe2#
      • 1...e3!
    • 1.Qa6?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxf5
        • 2.Qe6#
      • 1...e3!
    • 1.Qg8+?
      • 1...Kxf5
        • 2.Qe6#
        • 2.Qg5#
      • 1...Kf3!
    • 1.f6?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kf5
        • 2.Qe6#
      • 1...e3!
    • 1.h6?
      • 1...Kf3
        • 2.Qe2#
      • 1...Kxf5
        • 2.Qe6#
      • 1...e3!
  • Keys
    • 1.Sd3!
      • 1...Kf3
        • 2.Se5#
      • 1...Kh3
        • 2.Sf2#
      • 1...Kxf5
        • 2.Qc8#
      • 1...Kxh5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::QAB1(E)
    • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
        • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
        • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • Refutation
        • P(b);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • S(F);P_PINP(b)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::S(F)
        • K(c);N_SPINP(b),OGATEB,S_FLIGHT,XP(G)::QAB(E)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
        • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(G);
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • P(H);
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
        • K(c);OGATEB,S_FLIGHT,XP(G)::QAB1(E)
      • Refutation
        • P(b);
  • Actual
    • S(F);P_PINP(b)
    • Vars
      • K(c);N_SPINP(b),S_FLIGHT::S(F)
      • K(c);N_SPINP(b),OGATEB,S_FLIGHT,XP(G)::QAB(E)
      • K(c);N_SPINP(b),S_FLIGHT,XP(H)::S(I)
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