MESON Chess Problem Database

Problem Display
PID: 268661 (8/3p4/3K1p2/5k1P/8/1B5N/4PBn1/7Q w - - 0 1)

Allen, Frederick B

Sunday Referee, 1930

(First published on Sun Jan 26 1930)

8/3p4/3K1p2/5k1P/8/1B5N/4PBn1/7Q

#2

7 + 4

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bc2#
      • 2.Qb1#
    • 1...Se3
      • 2.Qf3#
  • Tries
    • 1.Be6+?
      • 1...Ke4
        • 2.Qxg2#
        • 2.Qb1#
      • 1...dxe6!
    • 1.Qh2?
      • 1...Ke4
        • 2.Bc2#
      • 1...Se1
        • 2.Qf4#
      • 1...Se3
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sh4
        • 2.Qf4#
      • 1...Kg4!
    • 1.e4+?
      • 1...Kg4
        • 2.Bd1#
      • 1...Kxe4!
  • Keys
    • 1.Bd1!
      • 1...Ke4
        • 2.Bc2#
      • 1...Kg4
        • 2.e4#
      • 1...Se1
        • 2.e4#
      • 1...Se3
        • 2.Qf3#
      • 1...Sf4
        • 2.e4#
      • 1...Sh4
        • 2.e4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::QAR2(A)
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • P(d);XB(D)
    • Try
      • Q(A);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(D)
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(b);P_SPINS(a),S_FLIGHT,XP(B)
  • Actual
    • B(D);
    • Vars
      • K(b);N_GUARD,P_SPINS(a),S_FLIGHT::B(D)
      • K(b);N_GUARD,S_FLIGHT::B(D)+P(B)
      • S(a);::P(B)
      • S(a);OGATE::QAR2(A)
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