MESON Chess Problem Database

Problem Display
PID: 241991 (8/4n3/8/4p2R/5k2/3Q3K/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/4n3/8/4p2R/5k2/3Q3K/8/8

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Rf5#
    • 1...Sf5
      • 2.Rxf5#
    • 1...Sc6
      • 2.Rf5#
    • 1...Sg6
      • 2.Rf5#
    • 1...Sc8
      • 2.Rf5#
    • 1...Sg8
      • 2.Rf5#
    • 1...e4
      • 2.Qg3#
  • Tries
    • 1.Kh4?
      • 1...Sf5+
        • 2.Rxf5#
      • 1...Sd5
        • 2.Rf5#
      • 1...Sc6
        • 2.Rf5#
      • 1...Sc8
        • 2.Rf5#
      • 1...Sg8
        • 2.Rf5#
      • 1...e4
        • 2.Qg3#
      • 1...Sg6+!
    • 1.Rxe5?
      • threat
        • 2.Qe4#
        • 2.Qe3#
        • 2.Qg3#
      • 1...Sf5
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...Sd5
        • 2.Rf5#
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qg3#
      • 1...Kxe5!
    • 1.Rg5?
      • threat
        • 2.Rg4#
      • 1...e4
        • 2.Qg3#
      • 1...Kxg5!
  • Keys
    • 1.Kg2!
      • threat
        • 2.Qf3#
      • 1...Kg4
        • 2.Qf3#
      • 1...e4
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • S(c);N_GUARD::R1(C)
    • S(c);N_GUARD::R1(C),XS(c)
    • P(b);SBLOCK::QAB1(A)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • S(c);CHECK,N_GUARD::R1(C),XS(c)
        • S(c);N_GUARD::R1(C)
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • S(c);CHECK
    • Try
      • R(C);XP(b)
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • K(B);S_FLIGHT
    • Threat
      • QAR1(A)
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • P(b);SBLOCK::QAB1(A)
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