MESON Chess Problem Database

Problem Display
PID: 198711 (8/2p5/1nQ5/4p3/2P1N1p1/3kP1Rn/1P6/3K4 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Tidskrift for Schack, 1921

8/2p5/1nQ5/4p3/2P1N1p1/3kP1Rn/1P6/3K4

#2

7 + 6

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Sf2#
    • 1...Sf2+
      • 2.Sxf2#
    • 1...Sf4
      • 2.Sf2#
    • 1...Sg5
      • 2.Sf2#
    • 1...Sa4
      • 2.Qd5#
    • 1...Sxc4
      • 2.Sc5#
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sd7
      • 2.Qd5#
    • 1...Sa8
      • 2.Qd5#
    • 1...Sc8
      • 2.Qd5#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Sc5#
        • 2.Qc2#
      • 1...Sf2+
        • 2.Sxf2#
      • 1...Kxe4
        • 2.Qc2#
      • 1...Sd7
        • 2.Qc2#
      • 1...c5
        • 2.Sxc5#
        • 2.Qc2#
      • 1...Sxa4!
    • 1.Qb5?
      • threat
        • 2.Sc5#
      • 1...Sf2+
        • 2.Sxf2#
      • 1...Sa4
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...c5
        • 2.Sxc5#
      • 1...Kxe4!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Sc5#
      • 1...Sf2+
        • 2.Sxf2#
      • 1...Kxe4
        • 2.Qg6#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sa4
        • 2.Qd5#
      • 1...Sd7
        • 2.Qd5#
      • 1...c5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::S(F)
    • S(b);CHECK,N_GUARD::S(F),XS(b)
    • S(e);N_GUARD::QAR2(G)
    • S(e);N_GUARD::QAR2(G),XS(e)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • K(a);S_FLIGHT,XS(F)::QAB(G)
        • S(e);::QAB1(G)
      • Refutation
        • S(e);XQ(G)
    • Try
      • Q(G);
      • Threat
        • S(F)
      • Vars
        • S(b);CHECK,N_GUARD::S(F),XS(b)
        • S(e);N_GUARD::QAR2(G)
        • P(f);::S(F),XP(f)
      • Refutation
        • K(a);S_FLIGHT,XS(F)
  • Actual
    • Q(G);
    • Threat
      • S(F)
    • Vars
      • S(b);CHECK,N_GUARD::S(F),XS(b)
      • K(a);OGATEB,P_SPINP(d),S_FLIGHT,XS(F)::QAB(G)
      • S(e);N_GUARD::QAR2(G),XS(e)
      • S(e);N_GUARD::QAR2(G)
      • P(f);::S(F),XP(f)
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