MESON Chess Problem Database

Problem Display
PID: 200388 (1BN3Q1/3K4/5P2/4pkP1/3P1P1P/1N5P/4P3/8 w - - 0 1)

Froberg, Johan Hilding Laurentius

Springaren, 1958

1BN3Q1/3K4/5P2/4pkP1/3P1P1P/1N5P/4P3/8

#2

12 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.Qh7#
    • 1...exf4
      • 2.Sd6#
      • 2.Qh7#
    • 1...e4
      • 2.Se7#
      • 2.Qh7#
  • Tries
    • 1.Sd2?
      • 1...exd4
        • 2.Se7#
        • 2.Qh7#
      • 1...exf4
        • 2.Sd6#
        • 2.Se7#
        • 2.Qh7#
      • 1...e4
        • 2.Se7#
        • 2.Qh7#
      • 1...Kxf4!
    • 1.Sc5?
      • 1...exd4
        • 2.Se7#
        • 2.Qh7#
      • 1...exf4
        • 2.Sd6#
        • 2.Se7#
        • 2.Qh7#
      • 1...e4
        • 2.Se7#
        • 2.Qh7#
      • 1...Kxf4!
    • 1.Qd5?
      • 1...Kxf4
        • 2.Qf3#
        • 2.Qxe5#
      • 1...Kg6!
    • 1.Qe6+?
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kxf4
        • 2.Qxe5#
      • 1...Kg6!
  • Keys
    • 1.Qe8!
      • 1...Ke4
        • 2.Qxe5#
      • 1...Kxf4
        • 2.Qxe5#
      • 1...exd4
        • 2.Sxd4#
      • 1...exf4
        • 2.Sd6#
      • 1...e4
        • 2.Se7#

This is a version

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);XP(D)::QAB(L)
  • Tries
    • Try
      • S(B);
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a),XP(E)
    • Try
      • S(B);
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a),XP(E)
    • Try
      • Q(L);P_PINP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT
    • Try
      • Q(L);CHECK
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR1(L),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a),XP(E)::QAB1(L),XP(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(L);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::QAR1(L),XP(a)
      • K(b);P-FLIGHT,P_SPINP(a),XP(E)::QAB1(L),XP(a)
      • P(a);XP(D)::S(B),XP(a)
      • P(a);SBLOCK,XP(E)::S(K)
      • P(a);SBLOCK::S(K)
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