MESON Chess Problem Database

Problem Display
PID: 92263 (8/3N1N2/8/8/2K2k2/4p3/4Q2P/8 w - - 0 1)

Figura, Josef

Wiener Schachzeitung, 1934

8/3N1N2/8/8/2K2k2/4p3/4Q2P/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qg4#
  • Tries
    • 1.Sde5?
      • threat
        • 2.Qf3#
        • 2.Qg4#
      • 1...Ke4
        • 2.Qf3#
        • 2.Qg4#
      • 1...Kf5!
    • 1.Sb6?
      • 1...Ke4
        • 2.Qg4#
      • 1...Kf5!
    • 1.Sb8?
      • 1...Ke4
        • 2.Qg4#
      • 1...Kf5!
    • 1.Sfe5?
      • threat
        • 2.Qg4#
      • 1...Ke4
        • 2.Qf3#
        • 2.Qg4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Kg5!
    • 1.Sh6?
      • threat
        • 2.Qg4#
      • 1...Ke4
        • 2.Qg4#
      • 1...Kg5!
    • 1.Qf1+?
      • 1...Ke4
        • 2.Sc5#
        • 2.Sf6#
        • 2.Sg5#
        • 2.Sd6#
      • 1...Kg4!
    • 1.Qh5?
      • 1...Ke4
        • 2.Qg4#
      • 1...e2!
    • 1.h3?
      • threat
        • 2.Qg4#
      • 1...Ke4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Kg3!
  • Keys
    • 1.Sf8!
      • 1...Ke4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(E);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • P(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(A)
      • K(b);P-FLIGHT::QAR2(A)
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