MESON Chess Problem Database

Problem Display
PID: 99610 (8/5p2/5N1R/4pk2/8/4K3/3Q4/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1930

8/5p2/5N1R/4pk2/8/4K3/3Q4/8

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kg5
      • 2.Ke4#
    • 1...Ke6
      • 2.Qd7#
    • 1...e4
      • 2.Qd5#
  • Tries
    • 1.Ke2?
      • 1...Ke6
        • 2.Qd7#
      • 1...e4!
    • 1.Kf2?
      • 1...Ke6
        • 2.Qd7#
      • 1...e4!
    • 1.Kf3?
      • 1...Ke6
        • 2.Qd7#
      • 1...e4+!
    • 1.Qa2?
      • 1...e4
        • 2.Qd5#
      • 1...Kg5!
    • 1.Qd3+?
      • 1...Ke6
        • 2.Qd7#
      • 1...e4
        • 2.Qd5#
      • 1...Kg5!
    • 1.Qd6?
      • 1...e4
        • 2.Qd5#
      • 1...Kg5!
    • 1.Qd8?
      • 1...Ke6
        • 2.Qd7#
      • 1...e4
        • 2.Qd5#
      • 1...Kg5!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qg4#
      • 1...Kg5
        • 2.Qh5#
      • 1...Ke6
        • 2.Qd7#
      • 1...e4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAB(A)+K(B)
    • K(b);S_FLIGHT::QAB1(A)
    • P(a);OGATEB::QAR2(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);CHECK
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB,P_SPINP(a)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • P(a);OGATEB::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);P-FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAB1(A)
      • P(a);OGATEB::QAR2(A)
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