MESON Chess Problem Database

Problem Display
PID: 231432 (B7/1N6/k7/1pQ5/8/p7/K7/8 w - - 0 1)

Regos, Imre

Magyar Sakkvilag, 1927

B7/1N6/k7/1pQ5/8/p7/K7/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qa5#
  • Tries
    • 1.Ka1?
      • 1...b4
        • 2.Qa5#
      • 1...a2!
    • 1.Kb1?
      • 1...b4
        • 2.Qa5#
      • 1...a2+!
    • 1.Kb3?
      • 1...b4
        • 2.Qa5#
      • 1...a2!
    • 1.Sa5?
      • 1...b4
        • 2.Bb7#
      • 1...Kxa5!
    • 1.Sd8?
      • 1...b4
        • 2.Bb7#
      • 1...Ka5!
    • 1.Qc7?
      • threat
        • 2.Sc5#
        • 2.Qa5#
      • 1...b4
        • 2.Qa5#
      • 1...Ka7!
  • Keys
    • 1.Sd6!
      • 1...Ka5
        • 2.Qxb5#
      • 1...b4
        • 2.Bb7#

FEATURES

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