MESON Chess Problem Database

Problem Display
PID: 12060 (4NK2/B1p5/QNk5/8/8/8/8/8 w - - 0 1)

Speckmann, Werner

L'Italia Scacchistica, 1974

4NK2/B1p5/QNk5/8/8/8/8/8

#2

5 + 2

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qc4#
  • Tries
    • 1.Ke7?
      • 1...Kc5
        • 2.Qc4#
      • 1...cxb6!
    • 1.Kf7?
      • 1...Kc5
        • 2.Qc4#
      • 1...cxb6!
    • 1.Kg7?
      • 1...Kc5
        • 2.Qc4#
      • 1...cxb6!
    • 1.Kg8?
      • 1...Kc5
        • 2.Qc4#
      • 1...cxb6!
    • 1.Sc4+?
      • 1...Kd5
        • 2.Sf6#
      • 1...Kd7!
    • 1.Sd7+?
      • 1...Kd5
        • 2.Sef6#
      • 1...Kxd7!
    • 1.Qa4+?
      • 1...Kc5
        • 2.Qc4#
      • 1...Kb7!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sa4#
        • 2.Sc4#
        • 2.Sbd5#
        • 2.Sbd7#
        • 2.Sa8#
        • 2.Sc8#
      • 1...Kc5
        • 2.Sbd5#
      • 1...Kd6
        • 2.Sc4#
      • 1...cxb6
        • 2.Qxb6#

Anticipated by 205691(1925)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(A)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • P(b);P_SPINP(b),XS(B)
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • P(b);P_SPINP(b),XS(B)
    • Try
      • K(E);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • P(b);P_SPINP(b),XS(B)
    • Try
      • K(E);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • P(b);P_SPINP(b),XS(B)
    • Try
      • S(B);CHECK
      • Vars
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);S_FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • DUALS(6)
    • Vars
      • K(a);P-FLIGHT::B(C)+S(B)
      • K(a);P-FLIGHT::QAR(A)+S(B),DCHECK
      • P(b);OGATE,P_SPINP(b),XS(B)::QAR1(A),XP(b)
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