MESON Chess Problem Database

Problem Display
PID: 150126 (8/4N3/1P1k1p2/4RB2/8/3Kn1Q1/8/8 w - - 0 1)

Meredith, William

Chess Journal, 1889

8/4N3/1P1k1p2/4RB2/8/3Kn1Q1/8/8

#2

6 + 3

14868 Pirnie Collection 2014
56 The Problemist 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qf3?
      • 1...Kxe5
        • 2.Qg3#
      • 1...Sxf5
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd1
        • 2.Qd5#
      • 1...Sf1
        • 2.Qd5#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sg2
        • 2.Qd5#
      • 1...Sc4
        • 2.Qd5#
      • 1...Sg4
        • 2.Qd5#
      • 1...fxe5!
    • 1.Qg8?
      • threat
        • 2.Qe6#
        • 2.Qb8#
      • 1...Kxe5
        • 2.Qg3#
        • 2.Qb8#
      • 1...Sxf5
        • 2.Qd5#
        • 2.Qe6#
      • 1...Sd5
        • 2.Qxd5#
      • 1...fxe5!
  • Keys
    • 1.Qe1!
      • 1...Kxe5
        • 2.Qg3#
      • 1...Sxf5
        • 2.Rd5#
      • 1...fxe5
        • 2.Qb4#
      • 1...Sd1
        • 2.Rd5#
      • 1...Sf1
        • 2.Rd5#
      • 1...Sc2
        • 2.Rd5#
      • 1...Sg2
        • 2.Rd5#
      • 1...Sc4
        • 2.Rd5#
      • 1...Sg4
        • 2.Rd5#
      • 1...Sd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(C)::QAB(B)
        • S(a);N_GUARD,XB(D)::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • P(c);XR(C)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • P(c);XR(C)
  • Actual
    • Q(B);
    • Vars
      • K(b);OGATEB,P_SPINS(a),S_FLIGHT,XR(C)::QAB(B)
      • S(a);N_GUARD,XB(D)::R1(C)
      • P(c);SBLOCK,XR(C)::QAB(B)
      • S(a);N_GUARD::R1(C)
      • S(a);N_GUARD::R1(C),XS(a)
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