MESON Chess Problem Database

Problem Display
PID: 243723 (4R3/7b/rp1N4/1P1k1rq1/3PNb2/2pKR2Q/8/8 w - - 0 1)

Beck, Friedrich

Skakbladet, 1939

4R3/7b/rp1N4/1P1k1rq1/3PNb2/2pKR2Q/8/8

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Qe6#
    • 1...Rf8
      • 2.Qe6#
    • 1...Bxd6
      • 2.Sxc3#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Sxc3#
      • 1...Re5
        • 2.Qd7#
      • 1...Rf7
        • 2.Qe6#
      • 1...Rf8
        • 2.Qe6#
      • 1...Ra3
        • 2.Sxb6#
      • 1...c2
        • 2.Sc3#
      • 1...Rf6!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Sxc3#
      • 1...Rf6
        • 2.Se7#
      • 1...Re5
        • 2.Qd7#
      • 1...Rf7
        • 2.Qe6#
      • 1...Rf8
        • 2.Qe6#
      • 1...Ra3
        • 2.Sxb6#
      • 1...c2
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(d);OGATE,P_PINS(E)::QAB1(C)
    • B(b);SBLOCK,XS(G)::S(E),XP(a)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(E),XP(a)
      • Vars
        • R(d);OGATE,P_PINS(E)::QAR2(C)
        • R(d);OGATE,P_PINS(E)::QAB1(C)
        • R(f);N_GUARD::S(G),XP(g)
        • P(a);::S(E)
      • Refutation
        • R(d);P_PINS(E)
  • Actual
    • S(G);
    • Threat
      • S(E),XP(a)
    • Vars
      • R(d);P_PINS(E),S_CUTQ(e)::S(G)
      • R(d);OGATE,P_PINS(E)::QAR2(C)
      • R(d);OGATE,P_PINS(E)::QAB1(C)
      • R(f);N_GUARD::S(G),XP(g)
      • P(a);::S(E)
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