MESON Chess Problem Database

Problem Display
PID: 242060 (8/8/8/5K2/5N1k/7p/5P1n/7R w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1936

8/8/8/5K2/5N1k/7p/5P1n/7R

#2

4 + 3

15148 Sadier Collection 2021
3713 Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Rxh3#
    • 1...Sf3
      • 2.Rxh3#
    • 1...Sg4
      • 2.Rxh3#
  • Tries
    • 1.Sg2+?
      • 1...hxg2
        • 2.Rxh2#
      • 1...Kh5!
    • 1.f3?
      • 1...Sxf3
        • 2.Rxh3#
      • 1...Sf1
        • 2.Rxh3#
      • 1...Sg4
        • 2.Rxh3#
      • 1...Kg3!
  • Keys
    • 1.Rg1!
      • 1...Sf1
        • 2.Rg4#
      • 1...Sf3
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#

This anticipates 249147(1990)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE,P_SPINP(b)::R1(A),XP(b)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • P(b);P_SPINS(a),XS(C)::R(A),XS(a)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(B);
      • Vars
        • S(a);OGATE,P_SPINP(b),XP(B)::R1(A),XP(b)
        • S(a);OGATE,P_SPINP(b)::R1(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • S(a);N_GUARD::R1(A)
      • S(a);N_GUARD::R1(A),XS(a)
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