MESON Chess Problem Database

Problem Display
PID: 10481 (R7/8/8/1N2Q3/pkp5/8/8/2K5 w - - 0 1)

Haring, Jacobus

Borsodi Vegyesz, 1965

R7/8/8/1N2Q3/pkp5/8/8/2K5

#2

4 + 3

5227 Schaak..., maar raak! 1969
3295 Einfuhrung in die Welt des Schachproblem 1984
3310 2345 Chess Problems 1997
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb3
      • 2.Qb2#
  • Tries
    • 1.Sa3?
      • 1...Kxa3
        • 2.Qb2#
      • 1...Kb3
        • 2.Qb2#
      • 1...c3!
    • 1.Qd6+?
      • 1...Kb3
        • 2.Qa3#
      • 1...Kxb5!
    • 1.Qc5+?
      • 1...Kb3
        • 2.Qa3#
      • 1...Kxc5!
    • 1.Qe7+?
      • 1...Kb3
        • 2.Qa3#
      • 1...Kxb5!
  • Keys
    • 1.Rb8!
      • 1...Kb3
        • 2.Qb2#
      • 1...Ka5
        • 2.Sc7#
      • 1...a3
        • 2.Sc3#
      • 1...c3
        • 2.Qxc3#

This anticipates 245500(2002)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(C)
  • Tries
    • Try
      • S(B);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT,XS(B)::QAB1(C)
        • K(b);P-FLIGHT::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
  • Actual
    • R(D);
    • Vars
      • K(b);P-FLIGHT::QAR1(C)
      • K(b);S_FLIGHT::QAR(C)+S(B)
      • P(a);SBLOCK::R(D)+S(B)
      • P(c);::QAB1(C),XP(c)
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