MESON Chess Problem Database

Problem Display
PID: 231525 (8/8/p7/QPk1P3/4K3/N7/8/8 w - - 0 1)

Regos, Imre

Magyar Sakkvilag, 1927

8/8/p7/QPk1P3/4K3/N7/8/8

#2

5 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...axb5
      • 2.Qxb5#
  • Tries
    • 1.Kd3?
      • 1...axb5
        • 2.Qxb5#
      • 1...Kd5!
    • 1.Ke3?
      • 1...axb5
        • 2.Qxb5#
      • 1...Kd5!
    • 1.Qd2?
      • threat
        • 2.Qd4#
        • 2.Qd6#
      • 1...axb5
        • 2.Qd6#
      • 1...Kb6!
    • 1.Qd8?
      • threat
        • 2.Qd4#
        • 2.Qd6#
      • 1...axb5
        • 2.Qd6#
      • 1...Kb4!
    • 1.Qa4?
      • threat
        • 2.Qd4#
      • 1...axb5
        • 2.Qxb5#
      • 1...Kb6!
  • Keys
    • 1.Sc2!
      • 1...Kc4
        • 2.Qb4#
      • 1...axb5
        • 2.Qc7#

FEATURES

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