MESON Chess Problem Database

Problem Display
PID: 64048 (7K/N2p2N1/3k4/2p5/2Pn3B/3P4/8/Q7 w - - 0 1)

Fisher, Max

Chess Amateur (The), 1910

7K/N2p2N1/3k4/2p5/2Pn3B/3P4/8/Q7

#2

7 + 4

5454 Near Snap 2010
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Sb5#
    • 1...Se6
      • 2.Se8#
  • Tries
    • 1.Bd8?
      • 1...Sc2
        • 2.Qf6#
      • 1...Se2
        • 2.Qf6#
      • 1...Sb3
        • 2.Qf6#
      • 1...Sf3
        • 2.Qf6#
      • 1...Sb5
        • 2.Qf6#
      • 1...Sf5
        • 2.Qf6#
      • 1...Sc6
        • 2.Sb5#
        • 2.Sc8#
        • 2.Qf6#
      • 1...Se6
        • 2.Sf5#
        • 2.Se8#
      • 1...Ke5!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qh2#
        • 2.Qb8#
      • 1...Ke5
        • 2.Qh2#
      • 1...Kc7
        • 2.Se8#
      • 1...Sc2
        • 2.Qb8#
      • 1...Se2
        • 2.Qb8#
      • 1...Sb3
        • 2.Qh2#
      • 1...Sf3
        • 2.Qb8#
      • 1...Sb5
        • 2.Qh2#
      • 1...Sf5
        • 2.Qb8#
      • 1...Sc6
        • 2.Sb5#
      • 1...Se6
        • 2.Se8#

Anticipated by 129775(1882), 129855(1893)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,SBLOCK::S(E)
    • S(a);SBLOCK::S(F)
  • Tries
    • Try
      • B(D);
      • Vars
        • S(a);OGATE::QAR2(A)
      • Refutation
        • K(c);P_SPINS(a),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P_SPINS(a),S_FLIGHT::QAB(A)
      • K(c);S_FLIGHT::S(F)
      • S(a);::QAB(A)
      • S(a);N_GUARD,SBLOCK::S(E)
      • S(a);SBLOCK::S(F)
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