MESON Chess Problem Database

Problem Display
PID: 227384 (3kNQ2/2Rq4/8/2PP4/4N3/8/8/4K3 w - - 0 1)

Rudolph, William E

Tidskrift for Schack, 1910

3kNQ2/2Rq4/8/2PP4/4N3/8/8/4K3

#2

7 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Qe7#
    • 1...Qa4
      • 2.Qe7#
    • 1...Qg4
      • 2.Qe7#
    • 1...Qb5
      • 2.Qe7#
    • 1...Qf5
      • 2.Qe7#
    • 1...Qc6
      • 2.Qe7#
    • 1...Qc8
      • 2.Qe7#
    • 1...Qxd5
      • 2.Qe7#
    • 1...Qxc7
      • 2.S8f6#
    • 1...Qe7
      • 2.Qxe7#
  • Tries
    • 1.Sg7+?
      • 1...Qe8
        • 2.Se6#
      • 1...Kxc7!
    • 1.Rxd7+?
      • 1...Kc8
        • 2.S8f6#
      • 1...Kxd7!
    • 1.Qf6+?
      • 1...Qe7
        • 2.Qxe7#
      • 1...Kxe8!
  • Keys
    • 1.Sg5!
      • 1...Qe6+
        • 2.Sxe6#
      • 1...Qxe8+
        • 2.Se6#
      • 1...Qe7+
        • 2.Qxe7#
      • 1...Qxd5
        • 2.Qe7#
      • 1...Qxc7
        • 2.Sf6#
      • 1...Qh3
        • 2.Sf7#
        • 2.Qe7#
      • 1...Qa4
        • 2.Se6#
        • 2.Sf7#
        • 2.Qe7#
      • 1...Qg4
        • 2.Sf7#
        • 2.Qe7#
      • 1...Qb5
        • 2.Se6#
        • 2.Sf7#
        • 2.Qe7#
      • 1...Qf5
        • 2.Qe7#
      • 1...Qc6
        • 2.Sf7#
        • 2.Qe7#
      • 1...Qc8
        • 2.Sf7#
        • 2.Qe7#
      • 1...Qd6
        • 2.Sf7#
      • 1...Qf7
        • 2.Sxf7#
      • 1...Qg7
        • 2.Se6#
      • 1...Qh7
        • 2.Se6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::QAB1(G)
    • Q(a);N_GUARD,XP(D)::QAB1(G)
    • Q(a);N_GUARD,SBLOCK,XR(E)::QAR(G)+S(F)
    • Q(a);N_GUARD,P_PINS(B)::QAB1(G),XQ(a)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • Q(a);P_PINS(B),P_SPINQ(a)::S(F)
      • Refutation
        • K(b);S_FLIGHT,XR(E)
    • Try
      • R(E);CHECK,XQ(a)
      • Vars
        • K(b);P-FLIGHT::QAR(G)+S(F)
      • Refutation
        • K(b);P-FLIGHT,XR(E)
    • Try
      • Q(G);CHECK
      • Vars
        • Q(a);N_GUARD,P_PINS(B),P_SPINQ(a)::QAB1(G),XQ(a)
      • Refutation
        • K(b);P-FLIGHT,XS(F)
  • Actual
    • S(B);
    • Vars
      • Q(a);CHECK,N_GUARD::S(B),XQ(a)
      • Q(a);CHECK,N_GUARD,P_SPINQ(a),XS(F)::S(B)
      • Q(a);CHECK,N_GUARD::QAB1(G),XQ(a)
      • Q(a);N_GUARD,XP(D)::QAB1(G)
      • Q(a);N_GUARD,SBLOCK,XR(E)::QAR(G)+S(F)
      • Q(a);N_GUARD::QAB1(G)
      • Q(a);N_GUARD::S(B)
      • Q(a);N_GUARD::S(B),XQ(a)
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