MESON Chess Problem Database

Problem Display
PID: 106897 (8/8/7Q/8/2Pkp3/1K2N3/8/8 w - - 0 1)

Hultberg, Gustav Herbert

Canadian Chess Championship, 1981

8/8/7Q/8/2Pkp3/1K2N3/8/8

#2

4 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sg4?
      • threat
        • 2.Qe3#
        • 2.Qd6#
      • 1...Kd3
        • 2.Qe3#
      • 1...e3
        • 2.Qxe3#
      • 1...Kc5!
    • 1.Sf5+?
      • 1...Kd3
        • 2.Qe3#
      • 1...Kc5
        • 2.Qd6#
      • 1...Ke5!
  • Keys
    • 1.Sd5!
      • 1...Kd3
        • 2.Qe3#
      • 1...Kc5
        • 2.Qb6#
      • 1...Ke5
        • 2.Qf6#
      • 1...e3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • P(b);::QAB1(D),XP(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(B);
    • Vars
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::QAB1(D)
      • P(b);::QAB1(D),XP(b)
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