MESON Chess Problem Database

Problem Display
PID: 258723 (2Qb4/k1Bn4/p7/8/1n1N4/5R2/6K1/8 w - - 0 1)

Fothergill, Percival Guy Laugham (PGLF)

English Mechanic and World of Science, 1909

(First published on Fri Dec 10 1909)

2Qb4/k1Bn4/p7/8/1n1N4/5R2/6K1/8

#2

5 + 5

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Sc6#
    • 1...Sc2
      • 2.Sc6#
    • 1...Sd3
      • 2.Sc6#
    • 1...Sd5
      • 2.Sc6#
    • 1...Sc6
      • 2.Sxc6#
    • 1...Sc5
      • 2.Qb8#
    • 1...Se5
      • 2.Qb8#
    • 1...Sb6
      • 2.Qb8#
    • 1...Sf6
      • 2.Qb8#
    • 1...Sb8
      • 2.Qxb8#
    • 1...Sf8
      • 2.Qb8#
    • 1...a5
      • 2.Sb5#
  • Tries
    • 1.Ra3?
      • threat
        • 2.Sb5#
      • 1...Sb8
        • 2.Qxb8#
      • 1...Bxc7!
  • Keys
    • 1.Rf8!
      • 1...Bxc7
        • 2.Qxc7#
      • 1...Sxf8
        • 2.Qb8#
      • 1...Sb8
        • 2.Qxb8#
      • 1...Bh4
        • 2.Qa8#
      • 1...Bg5
        • 2.Qa8#
      • 1...Bf6
        • 2.Qa8#
      • 1...Be7
        • 2.Qa8#
      • 1...Sa2
        • 2.Sc6#
      • 1...Sc2
        • 2.Sc6#
      • 1...Sd3
        • 2.Sc6#
      • 1...Sd5
        • 2.Sc6#
      • 1...Sc6
        • 2.Sxc6#
      • 1...Sc5
        • 2.Qb8#
      • 1...Se5
        • 2.Qb8#
      • 1...Sb6
        • 2.Qb8#
      • 1...Sf6
        • 2.Qb8#
      • 1...a5
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(C)
    • S(a);N_GUARD::S(C),XS(a)
    • S(d);N_GUARD::QAB1(E)
    • S(d);N_GUARD::QAB1(E),XS(d)
    • P(b);N_GUARD::S(C)
  • Tries
    • Try
      • R(B);P_PINP(b)
      • Threat
        • S(C)
      • Vars
        • S(d);N_GUARD::QAB1(E),XS(d)
      • Refutation
        • B(e);XB(D)
  • Actual
    • R(B);
    • Vars
      • B(e);OGATE,XB(D)::QAR2(E),XB(e)
      • S(d);N_GUARD,XR(B)::QAB1(E)
      • S(d);N_GUARD::QAB1(E),XS(d)
      • B(e);::QAR1(E)
      • S(a);N_GUARD::S(C)
      • S(a);N_GUARD::S(C),XS(a)
      • S(d);N_GUARD::QAB1(E)
      • P(b);N_GUARD::S(C)
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