MESON Chess Problem Database

Problem Display
PID: 120797 (8/6Q1/4n3/4p3/2K1B3/3NkP2/p3p2b/4B3 w - - 0 1)

Wolfenter, Friedrich

Post und Sport, 1969

8/6Q1/4n3/4p3/2K1B3/3NkP2/p3p2b/4B3

#2

6 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qxg1#
    • 1...Bf4
      • 2.Qg1#
    • 1...Sf4
      • 2.Qa7#
    • 1...Sg5
      • 2.Qa7#
    • 1...Sd8
      • 2.Qa7#
    • 1...Sf8
      • 2.Qa7#
  • Tries
    • 1.Sb4?
      • threat
        • 2.Sd5#
      • 1...Kf4
        • 2.Sd5#
        • 2.Bd2#
      • 1...Sf4
        • 2.Sc2#
        • 2.Qa7#
      • 1...Sc7!
    • 1.Qh6+?
      • 1...Sf4
        • 2.Qb6#
      • 1...Sg5
        • 2.Qb6#
      • 1...Bf4!
    • 1.Qg2?
      • threat
        • 2.Qf2#
      • 1...Bg1
        • 2.Qxg1#
      • 1...Bg3!
    • 1.Qg3?
      • threat
        • 2.Qf2#
      • 1...Bg1
        • 2.Qxg1#
      • 1...Bxg3!
    • 1.Qa7+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Sg2#
        • 2.Sd5#
      • 1...Kxf4
        • 2.Bd2#
      • 1...Bxf4
        • 2.Qg1#
      • 1...Sxf4
        • 2.Qa7#
      • 1...exf4
        • 2.Qc3#
      • 1...Sc7
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(c);N_GUARD::QAB(F),XB(c)
    • B(c);N_GUARD::QAB(F)
    • S(f);N_GUARD::QAB(F)
  • Tries
    • Try
      • S(B);
      • Threat
        • S(B)
      • Refutation
        • S(f);
    • Try
      • Q(F);CHECK
      • Vars
        • S(f);OGATE,P_SPINS(f)::QAB(F)
      • Refutation
        • B(c);P_SPINB(c)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • B(c);N_GUARD::QAB(F),XB(c)
      • Refutation
        • B(c);
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • B(c);N_GUARD::QAB(F),XB(c)
      • Refutation
        • B(c);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB(F),XS(f)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • S(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);S_FLIGHT,XS(B)::B(A)
      • B(c);N_GUARD,SBLOCK,XS(B)::QAB(F)
      • S(f);N_GUARD,SBLOCK,XS(B)::QAB(F)
      • P(e);OGATE,SBLOCK,XS(B)::QAR2(F)
      • S(f);::S(B)
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