MESON Chess Problem Database

Problem Display
PID: 218263 (3n4/p2K4/8/2pk4/B1Nbp2n/4QN2/8/2R5 w - - 0 1)

Healey, Frank

English Mechanic and World of Science, 1873

(First published on Fri Nov 28 1873)

3n4/p2K4/8/2pk4/B1Nbp2n/4QN2/8/2R5

#2

6 + 7

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe3
      • 2.Sxe3#
    • 1...Sc6
      • 2.Bxc6#
    • 1...Se6
      • 2.Bc6#
    • 1...Sb7
      • 2.Bc6#
    • 1...Sf7
      • 2.Bc6#
    • 1...a5
      • 2.Sb6#
    • 1...a6
      • 2.Sb6#
  • Tries
    • 1.Scd2?
      • threat
        • 2.Qxe4#
      • 1...exf3
        • 2.Qe4#
      • 1...c4
        • 2.Qxd4#
      • 1...Bxe3!
    • 1.Sd6?
      • threat
        • 2.Qxe4#
      • 1...exf3
        • 2.Qe4#
      • 1...c4
        • 2.Qxd4#
      • 1...Bxe3!
    • 1.Qg5+?
      • 1...Be5
        • 2.Se3#
        • 2.Qxe5#
      • 1...Sf5!
  • Keys
    • 1.Bc2!
      • threat
        • 2.Bxe4#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Bxe3
        • 2.Sxe3#
      • 1...exf3
        • 2.Be4#
      • 1...Bc3
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(a);XQ(B)::S(E),XB(a)
    • S(g);N_GUARD::B(D),XS(g)
    • S(g);N_GUARD::B(D)
    • P(f);N_GUARD::S(E)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • P(b);XS(C)::QAB1(B)
        • P(d);N_GUARD::QAR1(B),XB(a)
      • Refutation
        • B(a);XQ(B)
    • Try
      • S(E);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • P(b);XS(C)::QAB1(B)
        • P(d);N_GUARD::QAR1(B),XB(a)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • B(D);
    • Threat
      • B(D),XP(b)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XS(E)::QAB1(B)
      • B(a);XQ(B)::S(E),XB(a)
      • P(b);XS(C)::B(D)
      • B(a);::QAB1(B),XP(b)
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