MESON Chess Problem Database

Problem Display
PID: 259110 (1b1N4/2p1p3/N2p1PB1/3k2KQ/R2B4/7p/bP6/6n1 w - - 0 1)

Rudd, Charles Dember

Western Morning News, 1923

(First published on Sat May 5 1923)

1b1N4/2p1p3/N2p1PB1/3k2KQ/R2B4/7p/bP6/6n1

#2

9 + 8

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ba7
      • 2.Sxc7#
    • 1...Se2
      • 2.Qf3#
    • 1...Sf3+
      • 2.Qxf3#
    • 1...exf6+
      • 2.Kxf6#
  • Tries
    • 1.Bf7+?
      • 1...e6
        • 2.Kf4#
      • 1...Ke4!
    • 1.Qg4?
      • threat
        • 2.Be4#
        • 2.Qe6#
        • 2.Qe4#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Bb1
        • 2.Qe6#
      • 1...Bc4
        • 2.Sb4#
        • 2.Qe4#
      • 1...e6
        • 2.Be4#
        • 2.Qxe6#
        • 2.Qe4#
      • 1...exf6+!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Bc3#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...exf6+
        • 2.Bxf6#
      • 1...Bb1
        • 2.Qb3#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bc4
        • 2.Sb4#
      • 1...Ba7
        • 2.Sxc7#
      • 1...Se2
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(h);N_GUARD::S(F),XP(f)
    • S(a);N_GUARD::QAB(E)
    • S(a);CHECK,N_GUARD::QAB(E),XS(a)
    • P(g);CHECK,XP(G)::QAR(E)+K(D),XP(g)
  • Tries
    • Try
      • B(H);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAR(E)+K(D)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);CHECK,N_GUARD::QAB(E),XS(a)
        • B(b);::QAB1(E)
      • Refutation
        • P(g);CHECK,XP(G)
  • Actual
    • Q(E);
    • Threat
      • QAR(E)+B(C)
    • Vars
      • S(a);CHECK,N_GUARD::QAB(E),XS(a)
      • P(g);CHECK,OGATE,XP(G)::QAR(E)+B(C),XP(g)
      • B(b);N_GUARD::QAB(E)
      • B(b);N_GUARD::QAB(E),XB(b)
      • B(b);SBLOCK::S(F)
      • B(h);N_GUARD::S(F),XP(f)
      • S(a);OGATE::QAB(E)
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