MESON Chess Problem Database

Problem Display
PID: 18841 (3K4/p2B2p1/8/1p1k1p2/2NPN3/3Q4/2PRP3/B2n2b1 w - - 0 1)

Barnes, Barry Peter

Lipton, Michael

Suomen Shakki, 1958

3K4/p2B2p1/8/1p1k1p2/2NPN3/3Q4/2PRP3/B2n2b1

#2

10 + 7

3976 FIDE Album (1956-1958) 1961
136 Problem Observer 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Qxd4#
    • 1...Sb2
      • 2.Sc3#
    • 1...Sf2
      • 2.Se3#
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
    • 1...Se3
      • 2.Sc3#
    • 1...a5
      • 2.Sb6#
    • 1...a6
      • 2.Sb6#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Sed6#
      • 1...Kxc4
        • 2.Qb3#
      • 1...Bxd4
        • 2.Rxd4#
      • 1...bxc4
        • 2.Qxf5#
      • 1...fxe4
        • 2.Qf7#
      • 1...Sf2
        • 2.Se3#
      • 1...Sc3!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Scd6#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Bxd4
        • 2.Rxd4#
      • 1...bxc4
        • 2.Qb7#
      • 1...fxe4
        • 2.Qxb5#
      • 1...Sb2
        • 2.Sc3#
      • 1...Se3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(b);OGATE,P_SPINB(b),XP(G)::QAR1(E),XB(b)
    • S(a);N_GUARD::S(H)
    • S(a);N_GUARD::S(H),XS(a)
    • P(f);N_GUARD::S(F)
    • P(g);N_GUARD::S(H)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB(E)+S(H)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(E)
        • B(b);OGATE,P_SPINB(b),XP(G)::R1(C),XB(b)
        • P(c);SBLOCK,XS(F)::QAR2(E),XP(e)
        • P(e);OGATE,P_SPINP(e),SBLOCK,XS(H)::QAB(E)
        • S(a);N_GUARD,S_CUTB(b)::S(F)
      • Refutation
        • S(a);
  • Actual
    • Q(E);
    • Threat
      • QAB(E)+S(F)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(H)::QAB1(E)
      • B(b);OGATE,P_SPINB(b),XP(G)::R1(C),XB(b)
      • P(c);OGATE,P_SPINP(c),SBLOCK,XS(F)::QAB(E)
      • P(e);SBLOCK,XS(H)::QAR2(E),XP(c)
      • S(a);N_GUARD::S(H)
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