MESON Chess Problem Database

Problem Display
PID: 242851 (2Nb4/4rp1P/5PpK/4k3/2bp1R1P/1pp3BQ/3r1P2/7B w - - 0 1)

Bakcsi, Gyorgy

Szoghy-70 JT, 1981

2Nb4/4rp1P/5PpK/4k3/2bp1R1P/1pp3BQ/3r1P2/7B

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2
      • 2.Rxf2#
    • 1...Re6
      • 2.Rf5#
    • 1...Be6
      • 2.Rf5#
    • 1...g5
      • 2.Qf5#
  • Tries
    • 1.Rf3+?
      • 1...Ke4
        • 2.Rxc3#
        • 2.Re3#
      • 1...Kd5!
    • 1.Rxd4+?
      • 1...Kxf6
        • 2.h8Q#
        • 2.h8B#
      • 1...Kxd4!
    • 1.Rg4+?
      • 1...Kf5
        • 2.Rxg6#
      • 1...Ke6
        • 2.Rxg6#
      • 1...Kxf6!
  • Keys
    • 1.Re4+!
      • 1...Kd5
        • 2.Re5#
      • 1...Kxf6
        • 2.h8Q#
        • 2.h8B#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(a);OGATE,XP(B)::B(C)+R(E),XR(a)
    • R(h);SBLOCK::B(C)+R(E),DCHECK
    • B(d);SBLOCK::B(C)+R(E),DCHECK
    • P(g);N_GUARD::QAR1(D)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • R(E);CHECK,XP(e)
      • Vars
        • K(f);S_FLIGHT,XP(G)::P=Q
      • Refutation
        • K(f);S_FLIGHT,XR(E)
    • Try
      • R(E);CHECK
      • Vars
        • K(f);P-FLIGHT::QAB(D)+R(E),XP(g)
      • Refutation
        • K(f);S_FLIGHT,XP(G)
  • Actual
    • R(E);CHECK
    • Vars
      • K(f);P-FLIGHT::B(A)+R(E),DCHECK
      • K(f);S_FLIGHT,XP(G)::P=Q
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