MESON Chess Problem Database

Problem Display
PID: 4996 (8/4pN1b/3p3p/Q6N/4k1p1/2K5/1P3Pnn/3B4 w - - 0 1)

Blake, Percy Francis

1st Prize, Liverpool Weekly Mercury, 1896-1897

8/4pN1b/3p3p/Q6N/4k1p1/2K5/1P3Pnn/3B4

#2

7 + 8

56 The Problemist 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.Sg3#
    • 1...Sf3
      • 2.Bc2#
    • 1...e5
      • 2.Sxd6#
    • 1...e6
      • 2.Sxd6#
  • Tries
    • 1.Kc4?
      • threat
        • 2.Qd5#
      • 1...d5+
        • 2.Qxd5#
      • 1...e5
        • 2.Sxd6#
      • 1...Sf4
        • 2.Sg3#
      • 1...e6
        • 2.Sxd6#
      • 1...Se3+!
    • 1.Qb4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5!
    • 1.Qa4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5!
    • 1.Qb5?
      • threat
        • 2.Qd3#
      • 1...Sf4
        • 2.Sg3#
      • 1...Se1!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qe6#
      • 1...Kf5
        • 2.Bc2#
      • 1...Bf5
        • 2.Qc4#
      • 1...Sf4
        • 2.Sg3#
      • 1...Sf3
        • 2.Bc2#
      • 1...d5
        • 2.Qb1#
      • 1...e5
        • 2.Sxd6#
      • 1...e6
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::S(F)
    • S(b);SBLOCK::B(A)
    • P(g);N_GUARD::S(G),XP(e)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • QAB1(E)
      • Vars
        • P(e);CHECK::QAB1(E),XP(e)
        • P(g);N_GUARD::S(G),XP(e)
        • S(a);SBLOCK::S(F)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • S(a);SBLOCK::S(F)
      • Refutation
        • S(a);
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • K(c);S_FLIGHT::B(A)
      • B(h);SBLOCK::QAR2(E)
      • S(a);SBLOCK::S(F)
      • S(b);SBLOCK::B(A)
      • P(e);SBLOCK::QAB(E)
      • P(g);N_GUARD,SBLOCK::S(G),XP(e)
      • P(g);::QAR2(E),XP(g)
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