MESON Chess Problem Database

Problem Display
PID: 96893 (8/7Q/3p1K2/1p1k4/1n4p1/NP6/4PB2/4n3 w - - 0 1)

Wenman, Francis Percival (aka Percy Wenman)

200 Assorted Problems (Wenman), 1945

8/7Q/3p1K2/1p1k4/1n4p1/NP6/4PB2/4n3

#2

6 + 6

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sec2
      • 2.Qh1#
    • 1...Sed3
      • 2.Qh1#
    • 1...Sa2
      • 2.Qb7#
    • 1...Sbc2
      • 2.Qb7#
    • 1...Sbd3
      • 2.Qb7#
    • 1...Sa6
      • 2.Qb7#
    • 1...Sc6
      • 2.e4#
  • Tries
    • 1.Qh1+?
      • 1...Sg2
        • 2.Qxg2#
      • 1...Sf3!
    • 1.Qh5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kc6!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sxb4#
      • 1...Kc6
        • 2.Sxb4#
      • 1...Sexc2
        • 2.Qh1#
      • 1...Sbxc2
        • 2.Qb7#
      • 1...Sed3
        • 2.Qh1#
      • 1...Sa2
        • 2.Qb7#
      • 1...Sbd3
        • 2.Qb7#
      • 1...Sa6
        • 2.Qb7#
      • 1...Sc6
        • 2.e4#

Anticipated by 9510(1904)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(F)
    • S(b);N_GUARD::QAB(F)
    • S(b);SBLOCK::P(A)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(F),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(F)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • S(C),XS(b)
    • Vars
      • K(e);S_FLIGHT::S(C),XS(b)
      • S(a);N_GUARD,XS(C)::QAB(F)
      • S(b);N_GUARD,XS(C)::QAB(F)
      • S(a);N_GUARD::QAB(F)
      • S(b);N_GUARD::QAB(F)
      • S(b);SBLOCK::P(A)
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