MESON Chess Problem Database

Problem Display
PID: 231530 (8/7p/7Q/8/4K1kp/8/6P1/5N2 w - - 0 1)

Papp, Mozes

Magyar Sakkvilag, 1927

8/7p/7Q/8/4K1kp/8/6P1/5N2

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...h3
      • 2.gxh3#
  • Tries
    • 1.Kd4?
      • 1...Kf5
        • 2.Se3#
      • 1...h3!
    • 1.Kd5?
      • 1...Kf5
        • 2.Se3#
      • 1...h3!
    • 1.g3?
      • threat
        • 2.Qxh4#
      • 1...hxg3
        • 2.Se3#
      • 1...h3
        • 2.Qh4#
      • 1...Kh3!
  • Keys
    • 1.Se3+!
      • 1...Kg3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(b);OGATE::P(B),XP(b)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::S(A)
      • Refutation
        • P(b);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::S(A)
      • Refutation
        • P(b);
    • Try
      • P(B);
      • Threat
        • QAR1(D),XP(b)
      • Vars
        • P(b);SBLOCK,XP(B)::S(A)
        • P(b);::QAR1(D)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
  • Actual
    • S(A);CHECK
    • Vars
      • K(a);P-FLIGHT::QAB1(D)
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