MESON Chess Problem Database

Problem Display
PID: 241869 (4BRb1/5p2/5k1K/8/4Q3/8/8/8 w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1931

4BRb1/5p2/5k1K/8/4Q3/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bh7
      • 2.Rxf7#
  • Tries
    • 1.Kh5?
      • 1...Bh7
        • 2.Rxf7#
      • 1...Kg7!
    • 1.Bxf7?
      • threat
        • 2.Bxg8#
        • 2.Qe6#
      • 1...Bh7
        • 2.Ba2#
        • 2.Bb3#
        • 2.Bc4#
        • 2.Bd5#
        • 2.Bh5#
        • 2.Bg6#
        • 2.Be8#
        • 2.Bg8#
        • 2.Qe6#
      • 1...Bxf7!
    • 1.Qd5?
      • 1...Bh7
        • 2.Rxf7#
      • 1...Ke7!
    • 1.Qe1?
      • 1...Bh7
        • 2.Rxf7#
      • 1...Kf5!
    • 1.Qe2?
      • 1...Bh7
        • 2.Rxf7#
      • 1...Kf5!
    • 1.Qe3?
      • 1...Bh7
        • 2.Rxf7#
      • 1...Kf5!
  • Keys
    • 1.Bd7!
      • 1...Bh7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(c);N_GUARD::R1(D),XP(b)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • B(c);N_GUARD::R1(D),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • B(C);XP(b)
      • Threat
        • DUALS(2)
      • Refutation
        • B(c);P_SPINB(c),XB(C)
    • Try
      • Q(A);
      • Vars
        • B(c);N_GUARD::R1(D),XP(b)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • B(c);N_GUARD::R1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • B(c);N_GUARD::R1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • B(c);N_GUARD::R1(D),XP(b)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(C);
    • Vars
      • B(c);::QAR1(A)
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