MESON Chess Problem Database

Problem Display
PID: 119095 (8/7B/7N/R1P1P2R/1n1kP3/3nN3/3K2Q1/8 w - - 0 1)

Wiedenhoff, Claude

Canadian Chess Chat, 1980

8/7B/7N/R1P1P2R/1n1kP3/3nN3/3K2Q1/8

#2

10 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe5
      • 2.Shf5#
  • Tries
    • 1.Qf1?
      • 1...Sxc5
        • 2.Qc4#
        • 2.Qa1#
      • 1...Sxe5
        • 2.Qa1#
      • 1...Sc1
        • 2.Qc4#
      • 1...Se1
        • 2.Qc4#
      • 1...Sf2
        • 2.Qc4#
        • 2.Qa1#
      • 1...Sf4
        • 2.Qc4#
        • 2.Qa1#
      • 1...Sa2
        • 2.Qxd3#
      • 1...Sc2
        • 2.Qxd3#
      • 1...Sd5
        • 2.Qxd3#
      • 1...Sa6
        • 2.Qxd3#
      • 1...Sc6
        • 2.Qxd3#
      • 1...Sb2!
    • 1.Qe2?
      • 1...Sxc5
        • 2.Qc4#
      • 1...Sxe5
        • 2.Sef5#
      • 1...Sc1
        • 2.Qc4#
      • 1...Se1
        • 2.Qc4#
      • 1...Sf2
        • 2.Qc4#
      • 1...Sf4
        • 2.Qc4#
      • 1...Sa2
        • 2.Qxd3#
      • 1...Sc2
        • 2.Qxd3#
      • 1...Sd5
        • 2.Qxd3#
      • 1...Sa6
        • 2.Qxd3#
      • 1...Sc6
        • 2.Qxd3#
      • 1...Sb2!
    • 1.Qg7?
      • 1...Sxc5
        • 2.e6#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Sc1
        • 2.e6#
      • 1...Se1
        • 2.e6#
      • 1...Sb2
        • 2.e6#
      • 1...Sf2
        • 2.e6#
      • 1...Sf4
        • 2.e6#
      • 1...Sa2
        • 2.Qd7#
      • 1...Sc2
        • 2.Qd7#
      • 1...Sa6
        • 2.Qd7#
      • 1...Sc6
        • 2.Qd7#
      • 1...Sd5!
    • 1.c6?
      • threat
        • 2.Shf5#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Sc5!
  • Keys
    • 1.e6!
      • 1...Sxc5
        • 2.Qg7#
      • 1...Sc1
        • 2.Qg7#
      • 1...Se1
        • 2.Qg7#
      • 1...Sb2
        • 2.Qg7#
      • 1...Sf2
        • 2.Qg7#
      • 1...Sf4
        • 2.Qg7#
      • 1...Se5
        • 2.Shf5#
      • 1...Sa2
        • 2.Rd5#
      • 1...Sc2
        • 2.Rd5#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Sa6
        • 2.Rd5#
      • 1...Sc6
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK,XP(G)::S(I)
  • Tries
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD,XP(G)::QAB(B)
        • S(a);OGATE::QAR1(B)
        • S(b);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Vars
        • S(a);OGATE,XP(F)::QAR1(B)
        • S(a);SBLOCK,XP(G)::S(C)
        • S(a);OGATE::QAR1(B)
        • S(b);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Vars
        • S(a);N_GUARD,XP(F)::QAB(B)+P(G)
        • S(a);OGATE,P_SPINS(a),XP(G)::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB(B)+P(G)
        • S(b);N_GUARD::QAR(B)
      • Refutation
        • S(b);
    • Try
      • P(F);
      • Threat
        • S(I)
      • Vars
        • S(b);N_GUARD::R1(E),XS(b)
      • Refutation
        • S(a);
  • Actual
    • P(G);
    • Vars
      • S(a);N_GUARD,XP(F)::QAB(B)
      • S(a);N_GUARD::QAB(B)
      • S(a);SBLOCK::S(I)
      • S(b);N_GUARD::R1(H)
      • S(b);N_GUARD::R1(H),XS(b)
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