MESON Chess Problem Database

Problem Display
PID: 140996 (BN4K1/2N5/Rp6/2p1k3/R1p3PP/8/4P3/5Q2 w - - 0 1)

Valuska, Jan

3rd HM., Europe Echecs, 1971

BN4K1/2N5/Rp6/2p1k3/R1p3PP/8/4P3/5Q2

#2

10 + 4

6490 yacpdb 2011

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qf4#
    • 1...b5
      • 2.Qf6#
  • Tries
    • 1.Kf7?
      • threat
        • 2.Qf6#
      • 1...Kd6
        • 2.Qf4#
      • 1...Kd4!
    • 1.Kf8?
      • 1...Kd6
        • 2.Qf4#
      • 1...c3
        • 2.Qf4#
      • 1...b5
        • 2.Qf6#
      • 1...Kd4!
    • 1.Se8?
      • threat
        • 2.Qf6#
      • 1...Ke6
        • 2.Qf6#
      • 1...Kd4!
    • 1.Sc6+?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kd6!
    • 1.Qd1?
      • 1...Kf6
        • 2.Qd6#
      • 1...c3
        • 2.Sd7#
      • 1...b5
        • 2.Qd6#
      • 1...Kf4!
    • 1.Qf2?
      • 1...c3
        • 2.Qf4#
      • 1...b5
        • 2.Sd7#
        • 2.Re6#
        • 2.Qe3#
        • 2.Qf6#
      • 1...Kd6!
    • 1.Qf3?
      • 1...Kd4
        • 2.Sc6#
      • 1...c3
        • 2.Qf4#
      • 1...b5
        • 2.Qe4#
        • 2.Qe3#
        • 2.Qf6#
      • 1...Kd6!
    • 1.Qf8?
      • 1...c3
        • 2.Sc6#
        • 2.Sd7#
        • 2.Re4#
        • 2.Qe7#
        • 2.Qf4#
      • 1...b5
        • 2.Qd6#
        • 2.Qf6#
      • 1...Kd4!
  • Keys
    • 1.Sd5!
      • 1...Kd4
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kd6
        • 2.Qf6#
      • 1...Ke6
        • 2.Qf6#
      • 1...c3
        • 2.Qf6#
      • 1...b5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);::QAB1(A)
    • P(d);::QAB1(A)
  • Tries
    • Try
      • K(J);S_FLIGHT
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P_SPINP(d),S_FLIGHT::QAB(A)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • K(J);P-FLIGHT
      • Vars
        • K(c);P_SPINP(d),S_FLIGHT::QAB(A)
        • P(a);::QAB1(A)
        • P(d);::QAB1(A)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • S(G);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(d)::QAR1(A)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • S(I);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(a)::QAB1(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);P_SPINP(d),S_FLIGHT::QAR2(A)
        • P(a);::S(I)
        • P(d);::QAB1(A)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);P_SPINP(a),S_FLIGHT::S(I)
        • P(a);::QAB1(A)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
  • Actual
    • S(G);
    • Vars
      • K(c);P_SPINP(a),S_FLIGHT::QAR2(A)
      • K(c);P-FLIGHT,P_SPINP(a)::QAR1(A)
      • K(c);P_SPINP(d),S_FLIGHT::QAR2(A)
      • K(c);P-FLIGHT,P_SPINP(d)::QAR1(A)
      • P(a);::QAB1(A)
      • P(d);::QAB1(A)
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