MESON Chess Problem Database

Problem Display
PID: 24054 (2r5/5p2/8/8/8/8/1Q5B/4nK1k w - - 0 1)

Raganis, A

Rigaer Rundschau, 1934

2r5/5p2/8/8/8/8/1Q5B/4nK1k

#2

3 + 4

2012 Miniature Chess Problems from Many Countries 1981
2786 More Fun with Chess Miniatures 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Sg2
      • 2.Qxg2#
    • 1...Sd3
      • 2.Qg2#
    • 1...Sf3
      • 2.Qg2#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qg1#
      • 1...Sf3
        • 2.Qg2#
      • 1...Rg8!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Qh2#
      • 1...Rxc7
        • 2.Qh8#
      • 1...Rh8
        • 2.Qxh8#
      • 1...Sc2
        • 2.Qb7#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sf3
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB1(B),XS(a)
    • S(a);N_GUARD::QAB1(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • S(a);N_GUARD::QAB1(B)
      • Refutation
        • R(d);
  • Actual
    • B(C);
    • Threat
      • QAR1(B)
    • Vars
      • R(d);N_GUARD,XB(C)::QAB(B)
      • R(d);N_GUARD::QAB(B),XR(d)
      • S(a);N_GUARD::QAB(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
      • S(a);N_GUARD::QAB1(B)
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