MESON Chess Problem Database

Problem Display
PID: 269207 (Kn6/RPkb4/P1pN4/2n1Q3/P3N3/8/5R2/6B1 w - - 0 1)

Gurr, John

Sunday Referee, 1930

(First published on Sun Sep 28 1930)

Kn6/RPkb4/P1pN4/2n1Q3/P3N3/8/5R2/6B1

#2

10 + 5

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kb6
      • 2.Sc4#
    • 1...Kd8
      • 2.Sf7#
    • 1...Sd3
      • 2.Qa5#
    • 1...Scxa6
      • 2.Qa5#
    • 1...Se6
      • 2.Qa5#
    • 1...Sxb7
      • 2.Qa5#
    • 1...Sbxa6
      • 2.b8Q#
  • Tries
    • 1.Sb5+?
      • 1...Kb6
        • 2.Qc7#
      • 1...Kd8!
    • 1.Se8+?
      • 1...Kb6
        • 2.Qc7#
        • 2.Qxc5#
      • 1...Kd8!
  • Keys
    • 1.Rd2!
      • 1...Kb6
        • 2.Sc4#
      • 1...Kd8
        • 2.Sf7#
      • 1...Sxa4
        • 2.Sf7#
      • 1...Sxe4
        • 2.Qa5#
      • 1...Scxa6
        • 2.Sf7#
        • 2.Qa5#
      • 1...Sxb7
        • 2.Qa5#
      • 1...Sbxa6
        • 2.b8Q#
      • 1...Bh3
        • 2.Sc4#
        • 2.Sc8#
      • 1...Bg4
        • 2.Sc4#
        • 2.Sc8#
      • 1...Bf5
        • 2.Sc4#
        • 2.Sc8#
      • 1...Be6
        • 2.Sc4#
        • 2.Sc8#
      • 1...Bc8
        • 2.Sc4#
        • 2.Sxc8#
      • 1...Be8
        • 2.Sc4#
        • 2.Sc8#
      • 1...Sb3
        • 2.Sf7#
      • 1...Sd3
        • 2.Qa5#
      • 1...Se6
        • 2.Sf7#
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(c);N_GUARD,S_FLIGHT::S(G)
    • S(a);OGATE::QAB(E)
    • S(a);OGATE,XP(F)::QAB(E)
    • S(a);OGATE,P_SPINS(a),XP(I)::QAB(E)
    • S(e);OGATE,XP(F)::P=Q
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);S_CUTP(b),S_FLIGHT::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(c);N_GUARD,P_SPINS(a),S_FLIGHT::S(G)
      • K(c);N_GUARD,S_FLIGHT::S(G)
      • S(a);XP(C)::QAB(E)+S(G)
      • S(a);OGATE,XS(D)::QAB(E)
      • S(a);OGATE,P_SPINS(a),XP(I)::QAB(E)
      • S(e);OGATE,XP(F)::P=Q
      • S(a);::QAB(E)+S(G)
      • S(a);OGATE::QAB(E)
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