MESON Chess Problem Database

Problem Display
PID: 242101 (8/8/8/8/3p2N1/3K4/6pQ/5k2 w - - 0 1)

Zilahi, Zoltan

Magyar Sakkvilag, 1928

8/8/8/8/3p2N1/3K4/6pQ/5k2

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qg1#
    • 1...g1Q
      • 2.Qe2#
    • 1...g1S
      • 2.Qf2#
    • 1...g1B
      • 2.Qe2#
    • 1...g1R
      • 2.Qe2#
      • 2.Qf2#
  • Tries
    • 1.Kd2?
      • 1...g1Q
        • 2.Qe2#
      • 1...g1S
        • 2.Qf2#
      • 1...g1B
        • 2.Qe2#
        • 2.Qh3#
      • 1...g1R
        • 2.Qe2#
        • 2.Qf2#
      • 1...d3!
    • 1.Qe5?
      • 1...Kg1
        • 2.Qe1#
      • 1...g1Q
        • 2.Qe2#
      • 1...g1B
        • 2.Qe2#
      • 1...g1R
        • 2.Qe2#
      • 1...g1S!
    • 1.Qxg2+?
      • 1...Ke1
        • 2.Qh1#
        • 2.Qg1#
        • 2.Qe2#
      • 1...Kxg2!
  • Keys
    • 1.Qf4+!
      • 1...Ke1
        • 2.Qc1#
      • 1...Kg1
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
    • P(b);OGATE,SBLOCK::QAB1(A)
    • P(b);OGATE::QAR1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);OGATE,SBLOCK::QAB1(A)
        • P(b);OGATE::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK,XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);P-FLIGHT::QAR(A)
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