MESON Chess Problem Database

Problem Display
PID: 136210 (4b1n1/R4p2/5k1P/4N3/4R2N/8/5K1n/2Q5 w - - 0 1)

Fothergill, Percival Guy Laugham (PGLF)

The Field, 1918

(First published on Sat Mar 9 1918)

4b1n1/R4p2/5k1P/4N3/4R2N/8/5K1n/2Q5

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Sxd7#
    • 1...Sf1
      • 2.Sg4#
    • 1...Sf3
      • 2.Sg4#
    • 1...Sg4+
      • 2.Sxg4#
    • 1...Sxh6
      • 2.Qxh6#
  • Tries
    • 1.Sef3?
      • threat
        • 2.Qb2#
        • 2.Qf4#
        • 2.Qg5#
        • 2.Qa1#
        • 2.Qc3#
      • 1...Sxf3
        • 2.Qf4#
      • 1...Sxh6
        • 2.Qb2#
        • 2.Qg5#
        • 2.Qxh6#
        • 2.Qa1#
        • 2.Qc3#
      • 1...Bd7
        • 2.Qb2#
        • 2.Qg5#
        • 2.Qa1#
        • 2.Qc3#
      • 1...Se7
        • 2.Qb2#
        • 2.Qg5#
        • 2.Qa1#
        • 2.Qc3#
      • 1...Sg4+!
    • 1.Ra6+?
      • 1...Bc6
        • 2.Sd7#
      • 1...Ke7!
    • 1.Rxf7+?
      • 1...Bxf7
        • 2.Sd7#
      • 1...Ke6!
    • 1.Qg5+?
      • 1...Ke6
        • 2.Sc4#
        • 2.Sxf7#
      • 1...Kxg5!
  • Keys
    • 1.Rd7!
      • 1...Sg4+
        • 2.Sxg4#
      • 1...Ke6
        • 2.Qc6#
      • 1...Bxd7
        • 2.Sxd7#
      • 1...Sxh6
        • 2.Qxh6#
      • 1...Sf1
        • 2.Sg4#
      • 1...Sf3
        • 2.Sg4#
      • 1...Se7
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(d);N_GUARD::S(E),XB(d)
    • S(a);N_GUARD::S(E)
    • S(a);CHECK,N_GUARD::S(E),XS(a)
    • S(e);OGATE,XP(F)::QAR2(A),XS(e)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(5)
      • Vars
        • S(a);XS(E)::QAR2(A)
      • Refutation
        • S(a);CHECK
    • Try
      • R(G);CHECK
      • Vars
        • B(d);P_SPINB(d)::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(G);CHECK,XP(c)
      • Vars
        • B(d);SBLOCK,XR(G)::S(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XQ(A)
  • Actual
    • R(G);
    • Vars
      • S(a);CHECK,N_GUARD::S(E),XS(a)
      • K(b);P-FLIGHT::QAR2(A)
      • B(d);XR(G)::S(E),XB(d)
      • S(e);OGATE,XP(F)::QAR2(A),XS(e)
      • S(a);N_GUARD::S(E)
      • S(e);SBLOCK::R(G)
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