MESON Chess Problem Database

Problem Display
PID: 268540 (8/4p3/5p2/nB5Q/3pk1N1/3p4/bp4P1/1r1n1NK1 w - - 0 1)

MacKay, Donald

Sunday Referee, 1929

(First published on Sun Oct 13 1929)

8/4p3/5p2/nB5Q/3pk1N1/3p4/bp4P1/1r1n1NK1

#2

6 + 10

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2+?
      • 1...Kf4
        • 2.g3#
      • 1...Sxf2!
    • 1.Sxf6+?
      • 1...Kf4
        • 2.g3#
      • 1...exf6!
    • 1.Bxd3+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxd3!
  • Keys
    • 1.g3!
      • threat
        • 2.Sd2#
      • 1...Kf3
        • 2.Sf2#
        • 2.Sxf6#
      • 1...f5
        • 2.Qh1#
      • 1...e5
        • 2.Sxf6#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Sc3
        • 2.Sf2#
      • 1...Se3
        • 2.Sf2#
      • 1...Sb3
        • 2.Bc6#
      • 1...Sc4
        • 2.Bc6#
      • 1...d2
        • 2.Sxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(g);P-FLIGHT,S_CUTS(b)::P(C)
      • Refutation
        • S(b);P_PINS(A),XS(D)
    • Try
      • S(D);CHECK,XP(i)
      • Vars
        • K(g);P-FLIGHT,S_CUTP(j)::P(C)
      • Refutation
        • P(j);XS(D)
    • Try
      • B(E);CHECK,XP(e)
      • Vars
        • K(g);P-FLIGHT::QAR1(F)
      • Refutation
        • K(g);S_FLIGHT,XB(E)
  • Actual
    • P(C);
    • Threat
      • S(A)
    • Vars
      • P(i);SBLOCK::QAB(F)
      • P(j);N_GUARD::S(D),XP(i)
      • S(b);N_GUARD,P_PINS(A)::S(D),XS(b)
      • S(b);N_GUARD,P_PINS(A)::S(D)
      • S(h);N_GUARD,S_CUTB(c)::B(E)
      • P(e);::S(A),XP(e)
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