MESON Chess Problem Database

Problem Display
PID: 84371 (Q2Bbq2/3p3B/Kp1Ppp2/3NknN1/3p4/3pp3/8/2R2R2 w - - 0 1)

Brown, David Leo

2nd Prize=, Northwest Chess, 1977

Q2Bbq2/3p3B/Kp1Ppp2/3NknN1/3p4/3pp3/8/2R2R2

#2

9 + 11

17108 White and Black From Brown (David L Brown) 1995
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Bc7#
    • 1...Qxd6
      • 2.Bxf6#
    • 1...Sxd6
      • 2.Sf3#
  • Tries
    • 1.Sf3+?
      • 1...Kxd6
        • 2.Bc7#
      • 1...Ke4!
    • 1.Bxf6+?
      • 1...Kxd6
        • 2.Se4#
      • 1...Qxf6!
    • 1.Rxf5+?
      • 1...Kxd6
        • 2.Se4#
        • 2.Bc7#
        • 2.Qb8#
      • 1...exf5!
  • Keys
    • 1.Sxb6!
      • threat
        • 2.Sc4#
      • 1...Kxd6
        • 2.Qb8#
      • 1...Qxd6
        • 2.Qe4#
      • 1...Sxd6
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XP(F)::B(I)
    • Q(k);N_GUARD,SBLOCK,XP(F)::B(I),XP(h)
    • S(e);SBLOCK,XP(F)::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(d);S_FLIGHT,XP(F)::B(I)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(e)
    • Try
      • B(I);CHECK,XP(h)
      • Vars
        • K(d);S_FLIGHT,XP(F)::S(D)
      • Refutation
        • Q(k);XB(I)
    • Try
      • R(B);CHECK,XS(e)
      • Refutation
        • P(g);XR(B)
  • Actual
    • S(C);XP(f)
    • Threat
      • S(C)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XP(F)::QAB(H)
      • Q(k);P_PINS(C),SBLOCK,XP(F)::QAR1(H)
      • S(e);SBLOCK,XP(F)::R(A)
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