MESON Chess Problem Database

Problem Display
PID: 93133 (3r2q1/3n1N1b/BQ3P2/K4R2/3Nk3/5p1P/8/8 w - - 0 1)

Erlin, Konrad (AKA Erlinger, Konrad)

Tidskrift for Schack, 1912

3r2q1/3n1N1b/BQ3P2/K4R2/3Nk3/5p1P/8/8

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb1+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Ke3!
    • 1.Qe6+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Kxd4!
  • Keys
    • 1.Se2!
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Bd3#
      • 1...Qxf7
        • 2.Sg3#
      • 1...Bxf5
        • 2.Qd4#
      • 1...Sxb6
        • 2.Re5#
      • 1...Sxf6
        • 2.Re5#
        • 2.Qe6#
      • 1...Sc5
        • 2.Re5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Qg3
        • 2.Sxg3#
      • 1...Qf8
        • 2.Sg3#
      • 1...Sb8
        • 2.Re5#
        • 2.Qe6#
      • 1...Sf8
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(B)::QAR1(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(F),XS(c)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
  • Actual
    • S(B);
    • Threat
      • S(H)
    • Vars
      • K(b);S_FLIGHT,XR(D)::B(E)
      • Q(f);N_GUARD,XS(H)::S(B)
      • B(d);SBLOCK,XR(D)::QAR1(F)
      • S(c);N_GUARD,XQ(F)::R1(D)
      • S(c);N_GUARD::R1(D)
      • S(c);N_GUARD::R1(D),XS(c)
      • Q(f);N_GUARD::S(B),XQ(f)
      • Q(f);N_GUARD::S(B)
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