MESON Chess Problem Database

Problem Display
PID: 241989 (8/8/8/8/8/2p3KN/R1b5/7k w - - 0 1)

Szentgyorgy, Erno

Magyar Sakkvilag, 1933

8/8/8/8/8/2p3KN/R1b5/7k

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Rh2#
    • 1...Bd1
      • 2.Rh2#
    • 1...Bb3
      • 2.Rh2#
    • 1...Bd3
      • 2.Rh2#
    • 1...Ba4
      • 2.Rh2#
    • 1...Be4
      • 2.Rh2#
    • 1...Bf5
      • 2.Rh2#
    • 1...Bg6
      • 2.Rh2#
    • 1...Bh7
      • 2.Rh2#
  • Tries
    • 1.Rb2?
      • 1...Bb1
        • 2.Rxb1#
        • 2.Rh2#
      • 1...Bd1
        • 2.Rh2#
      • 1...Bb3
        • 2.Rh2#
      • 1...Bd3
        • 2.Rh2#
      • 1...Ba4
        • 2.Rh2#
      • 1...Be4
        • 2.Rh2#
      • 1...Bf5
        • 2.Rh2#
      • 1...Bg6
        • 2.Rh2#
      • 1...Bh7
        • 2.Rh2#
      • 1...cxb2!
  • Keys
    • 1.Ra1+!
      • 1...Bb1
        • 2.Rxb1#
      • 1...Bd1
        • 2.Rxd1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • B(b);OGATE::R1(A)
  • Tries
    • Try
      • R(A);
      • Vars
        • B(b);OGATE::R1(A)
      • Refutation
        • P(c);XR(A)
  • Actual
    • R(A);CHECK
    • Vars
      • B(b);N_GUARD,P_SPINB(b)::R(A),XB(b)
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