MESON Chess Problem Database

Problem Display
PID: 258676 (3rr2B/2p5/2Kpn3/2pN4/3pk1p1/6pq/4B1p1/n1Q4N w - - 0 1)

Fothergill, Percival Guy Laugham (PGLF)

English Mechanic and World of Science, 1904

(First published on Fri Dec 16 1904)

3rr2B/2p5/2Kpn3/2pN4/3pk1p1/6pq/4B1p1/n1Q4N

#2

6 + 13

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Bd3#
    • 1...Qh5
      • 2.Sxg3#
    • 1...Qh6
      • 2.Sxg3#
    • 1...Qh7
      • 2.Sxg3#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sg5
      • 2.Qf4#
    • 1...Sg7
      • 2.Qf4#
    • 1...Sf8
      • 2.Qf4#
  • Tries
    • 1.Sf2+?
      • 1...Kf5
        • 2.Bd3#
      • 1...gxf2!
    • 1.Sc3+?
      • 1...Kf5
        • 2.Bd3#
      • 1...dxc3!
    • 1.Bd3+?
      • 1...Kf3
        • 2.Qd1#
      • 1...Kxd3!
    • 1.Qe3+?
      • 1...Kf5
        • 2.Bd3#
      • 1...dxe3!
    • 1.Qb1+?
      • 1...d3
        • 2.Qxd3#
      • 1...Sc2!
    • 1.Qc2+?
      • 1...d3
        • 2.Qxd3#
      • 1...Sxc2!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qg6#
      • 1...Kf5
        • 2.Bd3#
      • 1...Qxh6
        • 2.Sxg3#
      • 1...Rxh8
        • 2.Qxe6#
      • 1...Sg7
        • 2.Qf4#
      • 1...Qh5
        • 2.Sxg3#
      • 1...Rf8
        • 2.Qxe6#
      • 1...Rg8
        • 2.Qxe6#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sf8
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(f);N_GUARD,S_FLIGHT::B(C)
    • Q(d);N_GUARD::S(B),XP(c)
    • S(j);N_GUARD::QAR1(A),XS(j)
    • S(j);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(f);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • P(c);XS(B)
    • Try
      • S(D);CHECK
      • Vars
        • K(f);N_GUARD,S_FLIGHT::B(C)
      • Refutation
        • P(e);XS(D)
    • Try
      • B(C);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB(A)
      • Refutation
        • K(f);S_FLIGHT,XB(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);S_FLIGHT::B(C)
      • Refutation
        • P(e);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAB1(A),XP(e)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAB1(A),XP(e)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(f);N_GUARD,S_FLIGHT::B(C)
      • Q(d);N_GUARD,XQ(A)::S(B),XP(c)
      • R(m);N_GUARD,XB(F)::QAR2(A),XS(j)
      • S(j);N_GUARD::QAR1(A)
      • Q(d);N_GUARD::S(B),XP(c)
      • R(m);N_GUARD::QAR2(A),XS(j)
      • S(j);N_GUARD::QAR1(A),XS(j)
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