MESON Chess Problem Database

Problem Display
PID: 10739 (1B2B3/8/7Q/8/4k2N/N7/8/5K2 w - - 0 1)

Nylund, Tauno

Sp. Prize, Stella Polaris, 1967

1B2B3/8/7Q/8/4k2N/N7/8/5K2

#2

6 + 1

3242 BCPS Rapid Solving (Cheltenham) 2001

SOLUTION

  • SOUND
  • Tries
    • 1.Sc2?
      • 1...Kd5
        • 2.Qc6#
      • 1...Kd3!
    • 1.Sb5?
      • 1...Kd5
        • 2.Qc6#
      • 1...Kd3!
    • 1.Sf3?
      • 1...Kxf3
        • 2.Qf4#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Qg6#
      • 1...Kd3!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Qe5#
      • 1...Kxe3!
    • 1.Qf4+?
      • 1...Kd5
        • 2.Qe5#
        • 2.Qc4#
      • 1...Kd3!
  • Keys
    • 1.Sf5!
      • 1...Kd3
        • 2.Qe3#
      • 1...Kf3
        • 2.Qf4#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kxf5
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR1(D)
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(D)
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