MESON Chess Problem Database

Problem Display
PID: 205710 (8/8/8/8/7p/7k/8/4nKQ1 w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1925

8/8/8/8/7p/7k/8/4nKQ1

#2

2 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qg2#
    • 1...Sg2
      • 2.Qxg2#
    • 1...Sd3
      • 2.Qg2#
    • 1...Sf3
      • 2.Qg2#
  • Tries
    • 1.Kf2?
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sc2
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg2#
      • 1...Sd3+!
    • 1.Qf2?
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sc2
        • 2.Qg2#
      • 1...Sd3
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg2#
      • 1...Kg4!
    • 1.Qg4+?
      • 1...Kh2
        • 2.Qxh4#
      • 1...Kxg4!
    • 1.Qg6?
      • 1...Sc2
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sd3
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg2#
      • 1...Kh2!
    • 1.Qg7?
      • 1...Sc2
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sd3
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg2#
      • 1...Kh2!
    • 1.Qg8?
      • 1...Sc2
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sd3
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg2#
      • 1...Kh2!
  • Keys
    • 1.Qg5!
      • 1...Kh2
        • 2.Qxh4#
      • 1...Sc2
        • 2.Qg2#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sd3
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
      • Refutation
        • S(a);CHECK
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAR2(B),XP(c)
      • S(a);N_GUARD::QAB1(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
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