MESON Chess Problem Database

Problem Display
PID: 258629 (n6B/r2n3p/4p2p/4P1kB/6P1/6P1/3NK3/1Q4bb w - - 0 1)

Fothergill, Percival Guy Laugham (PGLF)

English Mechanic and World of Science, 1902

(First published on Fri Jun 13 1902)

n6B/r2n3p/4p2p/4P1kB/6P1/6P1/3NK3/1Q4bb

#2

8 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3+
      • 2.Sxf3#
    • 1...Be4
      • 2.Sxe4#
    • 1...Sc5
      • 2.Bf6#
    • 1...Sdb6
      • 2.Bf6#
    • 1...Sf6
      • 2.Bxf6#
    • 1...Sb8
      • 2.Bf6#
    • 1...Sf8
      • 2.Bf6#
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qf4#
      • 1...Bf3+
        • 2.Sxf3#
      • 1...Bxe4
        • 2.Sxe4#
      • 1...Be3
        • 2.Qxe3#
      • 1...Ra4!
    • 1.Qxh7?
      • threat
        • 2.Qg6#
        • 2.Qg8#
        • 2.Qg7#
      • 1...Bf3+
        • 2.Sxf3#
      • 1...Be4
        • 2.Sxe4#
      • 1...Sc5
        • 2.Bf6#
        • 2.Qg6#
      • 1...Sdb6
        • 2.Bf6#
        • 2.Qg6#
      • 1...Sf6
        • 2.Bxf6#
        • 2.Qg6#
      • 1...Sb8
        • 2.Bf6#
        • 2.Qg6#
      • 1...Sf8
        • 2.Bf6#
      • 1...Sxe5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qg8#
      • 1...Bf3+
        • 2.Sxf3#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Sxb8
        • 2.Bf6#
      • 1...Be4
        • 2.Sxe4#
      • 1...Sc5
        • 2.Bf6#
      • 1...Sdb6
        • 2.Bf6#
      • 1...Sf6
        • 2.Bxf6#
      • 1...Sf8
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,N_GUARD::S(B),XB(b)
    • B(b);N_GUARD::S(B),XB(b)
    • S(g);N_GUARD::B(H)
    • S(g);N_GUARD::B(H),XS(g)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(b);CHECK,N_GUARD::S(B),XB(b)
        • B(b);XQ(A)::S(B),XB(b)
        • B(a);N_GUARD::QAB(A),XB(a)
      • Refutation
        • R(f);
    • Try
      • Q(A);XP(h)
      • Threat
        • DUALS(3)
      • Vars
        • B(b);CHECK,N_GUARD::S(B),XB(b)
        • B(b);N_GUARD::S(B),XB(b)
        • S(g);N_GUARD::B(H)
      • Refutation
        • S(g);XP(F)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • B(b);CHECK,N_GUARD::S(B),XB(b)
      • S(g);OGATE,XP(F)::QAR2(A),XS(g)
      • S(g);N_GUARD,XQ(A)::B(H)
      • B(b);N_GUARD::S(B),XB(b)
      • S(g);N_GUARD::B(H)
      • S(g);N_GUARD::B(H),XS(g)
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