MESON Chess Problem Database

Problem Display
PID: 57572 (3K4/4N1k1/6P1/R6p/3p3p/3P1P1P/B7/1Q6 w - - 0 1)

Lubell, Martin S

Chess Life, 1957

3K4/4N1k1/6P1/R6p/3p3p/3P1P1P/B7/1Q6

#2

9 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • 1...Kf8
        • 2.Qh6#
      • 1...Kh8
        • 2.Qh6#
      • 1...Kf6!
    • 1.Qb3?
      • 1...Kf6
        • 2.Qf7#
      • 1...Kf8
        • 2.Qf7#
        • 2.Qg8#
      • 1...Kh8
        • 2.Qg8#
      • 1...Kh6!
    • 1.Qb4?
      • 1...Kf6
        • 2.Qxd4#
      • 1...Kf8
        • 2.Sf5#
      • 1...Kh8
        • 2.Qxd4#
      • 1...Kh6!
    • 1.Qb6?
      • 1...Kf8
        • 2.Qf6#
      • 1...Kh8
        • 2.Qxd4#
        • 2.Qf6#
      • 1...Kh6!
  • Keys
    • 1.Qg1!
      • 1...Kf6
        • 2.Qxd4#
      • 1...Kh6
        • 2.Sf5#
      • 1...Kf8
        • 2.g7#
      • 1...Kh8
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(d);S_FLIGHT::QAB(A)
        • K(d);S_FLIGHT::QAR2(A)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(d);S_FLIGHT::QAR1(A)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(d);S_FLIGHT::QAB(A),XP(a)
        • K(d);S_FLIGHT::QAB(A)+S(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(d);S_FLIGHT::QAR2(A)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(d);S_FLIGHT::QAB(A),XP(a)
      • K(d);S_FLIGHT::S(H)
      • K(d);OGATE,S_FLIGHT::P(G)
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