MESON Chess Problem Database

Problem Display
PID: 144890 (8/B3Q3/1R2p3/6pB/8/2n1R3/5k2/7K w - - 0 1)

Mackenzie, Arthur Ford

Pictorial World, 1891

8/B3Q3/1R2p3/6pB/8/2n1R3/5k2/7K

#2

6 + 4

81 Chess 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Kf1
      • 2.Qf6#
      • 2.Qf8#
      • 2.Qf7#
    • 1...e5
      • 2.Rf6#
  • Tries
    • 1.Rb2+?
      • 1...Kf1
        • 2.Qf6#
        • 2.Qf8#
        • 2.Qf7#
      • 1...Se2!
    • 1.Qxg5?
      • threat
        • 2.Qf4#
        • 2.Qg1#
      • 1...Kf1
        • 2.Qf4#
        • 2.Qf6#
        • 2.Qg1#
        • 2.Qg2#
      • 1...Sd5
        • 2.Qg1#
      • 1...e5
        • 2.Rf6#
        • 2.Qg1#
      • 1...Se2!
  • Keys
    • 1.Qb4!
      • 1...Kf1
        • 2.Qf8#
      • 1...Kxe3
        • 2.Rd6#
      • 1...Se4
        • 2.Qe1#
      • 1...Sb1
        • 2.Qe1#
      • 1...Sd1
        • 2.Qe1#
      • 1...Sa2
        • 2.Qe1#
      • 1...Se2
        • 2.Rf3#
      • 1...Sa4
        • 2.Qe1#
      • 1...Sb5
        • 2.Qe1#
      • 1...Sd5
        • 2.Qe1#
      • 1...g4
        • 2.Qf4#
      • 1...e5
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATE::R(D)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(F);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAB1(F)
      • Refutation
        • S(b);
  • Actual
    • Q(F);
    • Vars
      • K(a);P-FLIGHT::QAB(F)
      • K(a);OGATEB,S_FLIGHT,XR(B)::B(E)+R(D)
      • S(b);OGATE::QAB1(F)
      • S(b);SBLOCK::R1(B)
      • P(c);N_GUARD::QAR2(F)
      • P(d);OGATE::R(D)
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Developed and maintained by Brian Stephenson.
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