MESON Chess Problem Database

Problem Display
PID: 231521 (4N3/8/QNk5/8/P2p4/3K4/8/8 w - - 0 1)

Regos, Imre

Magyar Sakkvilag, 1927

4N3/8/QNk5/8/P2p4/3K4/8/8

#2

5 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qb5#
  • Tries
    • 1.Kc2?
      • 1...Kc5
        • 2.Qb5#
      • 1...d3+!
    • 1.Kd2?
      • 1...Kc5
        • 2.Qb5#
      • 1...d3!
    • 1.Ke2?
      • 1...Kc5
        • 2.Qb5#
      • 1...d3+!
    • 1.Ke4?
      • 1...Kc5
        • 2.Qb5#
      • 1...d3!
    • 1.Sc4+?
      • 1...Kc5
        • 2.Qb5#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd7!
    • 1.Sd5+?
      • 1...Kc5
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qd6#
      • 1...Kxd5
        • 2.Qd6#
      • 1...Kd7!
    • 1.Sd7+?
      • 1...Kd5
        • 2.Sef6#
        • 2.Sc7#
        • 2.Qc4#
        • 2.Qd6#
      • 1...Kxd7!
    • 1.Sa8+?
      • 1...Kc5
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd7!
    • 1.Sc8+?
      • 1...Kc5
        • 2.Qc4#
        • 2.Qb5#
        • 2.Qd6#
      • 1...Kd5
        • 2.Qd6#
      • 1...Kd7!
    • 1.Qb7+?
      • 1...Kc5
        • 2.Sd7#
      • 1...Kxb7!
  • Keys
    • 1.a5!
      • 1...Kc5
        • 2.Qc4#

FEATURES

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