MESON Chess Problem Database

Problem Display
PID: 93600 (4k1n1/8/2NBK3/7P/8/7Q/8/8 w - - 0 1)

Bansac, Pierre

Parallele 50, 1951

4k1n1/8/2NBK3/7P/8/7Q/8/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qf7#
        • 2.Qf8#
      • 1...Sh6
        • 2.Qf8#
      • 1...Se7
        • 2.Qf7#
      • 1...Sf6!
    • 1.Qf3?
      • threat
        • 2.Qf7#
        • 2.Qf8#
      • 1...Sh6
        • 2.Qf8#
      • 1...Se7
        • 2.Qf7#
      • 1...Sf6!
    • 1.Qh4?
      • threat
        • 2.Qd8#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sf6!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qg6#
        • 2.Qf7#
        • 2.Qf8#
      • 1...Sf6
        • 2.Qg6#
      • 1...Sh6
        • 2.Qf8#
      • 1...Se7
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(A)
        • S(b);::QAB1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(A)
        • S(b);::QAB1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • DUALS(3)
    • Vars
      • S(b);::QAB(A)
      • S(b);::QAR1(A)
      • S(b);::QAB1(A)
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