MESON Chess Problem Database

Problem Display
PID: 28600 (3b4/5K2/3PN3/2PkpR2/B1p1p3/3n1p2/3N1p2/3Q4 w - - 0 1)

Shire, David J

British Chess Magazine, 1976

3b4/5K2/3PN3/2PkpR2/B1p1p3/3n1p2/3N1p2/3Q4

#2

8 + 8

3256 David Shire Selected Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qb3#
    • 1...e3
      • 2.Qxf3#
  • Tries
    • 1.Sb1?
      • threat
        • 2.Sc3#
      • 1...c3
        • 2.Qb3#
      • 1...Ba5!
    • 1.Sf1?
      • threat
        • 2.Se3#
      • 1...e3
        • 2.Qxf3#
      • 1...Bg5!
    • 1.Sb3?
      • threat
        • 2.Sf4#
      • 1...cxb3
        • 2.Qxb3#
      • 1...e3
        • 2.Qxf3#
      • 1...Bg5
        • 2.Sc7#
      • 1...c3!
    • 1.Sxf3?
      • threat
        • 2.Rxe5#
      • 1...exf3
        • 2.Qxf3#
      • 1...c3
        • 2.Qb3#
      • 1...Bf6!
    • 1.Sxc4?
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Qb3#
      • 1...e3
        • 2.Qxd3#
      • 1...Bg5
        • 2.Sb6#
      • 1...f1S!
    • 1.Qc2?
      • threat
        • 2.Qxc4#
      • 1...Sb2
        • 2.Qxe4#
      • 1...c3
        • 2.Qb3#
        • 2.Qa2#
      • 1...Sxc5!
    • 1.Qa1?
      • threat
        • 2.Qd4#
      • 1...c3
        • 2.Qa2#
      • 1...Sb2!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Qxf3#
      • 1...c3
        • 2.Qxd3#
      • 1...Ba5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(d);OGATEB::QAB(A)
    • P(e);OGATEB::QAB(A),XP(c)
  • Tries
    • Try
      • S(B);P_PINS(b)
      • Threat
        • S(B)
      • Vars
        • P(d);OGATEB::QAB(A)
      • Refutation
        • B(h);
    • Try
      • S(B);P_PINS(b)
      • Threat
        • S(B)
      • Vars
        • P(e);OGATEB::QAB(A),XP(c)
      • Refutation
        • B(h);
    • Try
      • S(B);P_PINS(b)
      • Threat
        • S(G)
      • Vars
        • P(d);OGATE,XS(B)::QAB(A),XP(d)
        • P(e);OGATEB::QAB(A),XP(c)
        • B(h);N_GUARD::S(G)
      • Refutation
        • P(d);
    • Try
      • S(B);P_PINS(b),XP(c)
      • Threat
        • R1(E),XP(g)
      • Vars
        • P(e);OGATE,XS(B)::QAB(A),XP(e)
        • P(d);OGATEB::QAB(A)
      • Refutation
        • B(h);
    • Try
      • S(B);P_PINS(b),XP(d)
      • Threat
        • S(B)
      • Vars
        • K(f);N_SPINP(g),N_SPINS(b),OGATEB,S_FLIGHT,XS(B)::QAB1(A)
        • P(e);N_GUARD::QAR2(A),XS(b)
        • B(h);N_GUARD::S(B)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(d)
      • Vars
        • S(b);OGATE::QAB1(A),XP(e)
      • Refutation
        • S(b);XP(D)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(d);OGATEB::QAB(A)
      • Refutation
        • S(b);
  • Actual
    • S(B);P_PINS(b),XP(e)
    • Threat
      • S(B)
    • Vars
      • K(f);N_SPINP(g),N_SPINS(b),OGATEB,S_FLIGHT,XS(B)::QAB1(A),XP(c)
      • P(d);N_GUARD::QAR2(A),XS(b)
      • B(h);N_GUARD::S(B)
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