MESON Chess Problem Database

Problem Display
PID: 241982 (8/8/8/2K5/kpP5/5Q2/1P6/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/8/8/2K5/kpP5/5Q2/1P6/8

#2

4 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qa8#
    • 1...b3
      • 2.Qa8#
  • Tries
    • 1.Qh1?
      • 1...Ka5
        • 2.Qa8#
        • 2.Qa1#
      • 1...b3
        • 2.Qa8#
        • 2.Qa1#
      • 1...Kb3!
    • 1.Qg2?
      • 1...Ka5
        • 2.Qa8#
      • 1...b3
        • 2.Qa8#
      • 1...Kb3!
    • 1.Qe4?
      • 1...Ka5
        • 2.Qa8#
      • 1...b3
        • 2.Qa8#
      • 1...Kb3!
    • 1.Qd5?
      • 1...Ka5
        • 2.Qa8#
      • 1...b3
        • 2.Qa8#
      • 1...Kb3!
    • 1.Qc6+?
      • 1...Ka5
        • 2.Qb5#
        • 2.Qa8#
      • 1...Kb3!
    • 1.Qb7?
      • threat
        • 2.Qxb4#
      • 1...Ka5
        • 2.Qa8#
        • 2.Qb5#
        • 2.Qa7#
      • 1...b3
        • 2.Qa6#
        • 2.Qa8#
        • 2.Qb4#
        • 2.Qb5#
        • 2.Qa7#
      • 1...Kb3!
    • 1.Qf1?
      • 1...Ka5
        • 2.Qa1#
      • 1...b3
        • 2.Qa1#
      • 1...Kb3!
    • 1.Qb3+?
      • 1...Ka5
        • 2.Qa2#
      • 1...Kxb3!
    • 1.Qf7?
      • 1...Ka5
        • 2.Qa7#
      • 1...b3
        • 2.Qa7#
      • 1...Kb3!
    • 1.Qf8?
      • 1...Ka5
        • 2.Qa8#
      • 1...b3
        • 2.Qa8#
      • 1...Kb3!
    • 1.b3+?
      • 1...Ka5
        • 2.Qa8#
      • 1...Ka3!
  • Keys
    • 1.Qd1+!
      • 1...Ka5
        • 2.Qa1#
      • 1...b3
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR(B)
    • P(b);SBLOCK::QAR(B)
  • Tries
    • Try
      • Q(B);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • P(b);SBLOCK::QAR(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);CHECK
    • Vars
      • K(a);P-FLIGHT::QAR(B)
      • P(b);P_SPINP(b),SBLOCK::QAR(B)
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