MESON Chess Problem Database

Problem Display
PID: 90119 (1R2N1K1/3kp2Q/Rn2n1B1/BP6/5p2/2p5/5b2/3rr3 w - - 0 1)

Strerath, Otto

Die Schwalbe 094. TT, 1949

1R2N1K1/3kp2Q/Rn2n1B1/BP6/5p2/2p5/5b2/3rr3

#2

8 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Sf6#
    • 1...Sc4
      • 2.Sf6#
    • 1...Sd5
      • 2.Rd6#
    • 1...Sa8
      • 2.Sf6#
    • 1...Sc8
      • 2.Sf6#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Ra7#
      • 1...Sc8
        • 2.Sf6#
      • 1...Sa4
        • 2.Sf6#
        • 2.Rd8#
      • 1...Sc4
        • 2.Sf6#
        • 2.Rd8#
      • 1...Sd5
        • 2.Rd6#
        • 2.Rd8#
      • 1...Sa8
        • 2.Sf6#
        • 2.Rd8#
      • 1...Rg1+!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Ra7#
      • 1...Sa4
        • 2.Rd8#
      • 1...Sc4
        • 2.Rd8#
      • 1...Sd5
        • 2.Rd8#
      • 1...Sa8
        • 2.Rd8#
      • 1...Sc8
        • 2.Rb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(f);::S(G)
    • S(f);OGATE::R1(C)
  • Tries
    • Try
      • B(D);P_PINS(g)
      • Threat
        • R(C)
      • Vars
        • S(f);::S(G)
      • Refutation
        • R(b);CHECK
  • Actual
    • Q(E);N_PINP(i),P_PINS(g)
    • Threat
      • R(C)
    • Vars
      • S(f);::R1(F)
      • S(f);SBLOCK::R(F)
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