MESON Chess Problem Database

Problem Display
PID: 7859 (KnQ1R2b/1p6/b6n/2Pk2p1/3N2r1/1PpBB3/8/2qN4 w - - 0 1)

Shire, David J

2nd Comm., Oxford TT, 1994

KnQ1R2b/1p6/b6n/2Pk2p1/3N2r1/1PpBB3/8/2qN4

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sxc3#
    • 1...Qb1
      • 2.Sxc3#
    • 1...Rg1
      • 2.Be4#
    • 1...Rg2
      • 2.Be4#
    • 1...Rg3
      • 2.Be4#
    • 1...Re4
      • 2.Bxe4#
    • 1...Bc4
      • 2.Bxc4#
      • 2.bxc4#
    • 1...c2
      • 2.Sc3#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qe6#
      • 1...Qxe3
        • 2.Sxe3#
      • 1...Re4
        • 2.Bxe4#
      • 1...Bd4
        • 2.Bc4#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Rd4!
    • 1.Re5+?
      • 1...Kxe5
        • 2.Qe6#
      • 1...Bxe5!
    • 1.Rd8+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Sd7!
    • 1.Qf5+?
      • 1...Be5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Sxf5!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qe6#
      • 1...Qxe3
        • 2.Sdxe3#
      • 1...Rd4
        • 2.Sxc3#
      • 1...Re4
        • 2.Bxe4#
      • 1...Bd4
        • 2.Sb4#
      • 1...Sd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • Q(a);N_GUARD::S(A),XP(b)
    • R(c);N_GUARD::B(C)
    • R(c);N_GUARD::B(C),XR(c)
    • P(b);S_CUTQ(a)::S(A)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(H)
      • Vars
        • Q(a);XB(D)::S(A),XQ(a)
        • R(c);N_GUARD::B(C),XR(c)
        • B(j);S_CUTR(c)::B(C)
        • S(i);N_GUARD::QAR2(H),XS(i)
      • Refutation
        • R(c);
    • Try
      • R(I);CHECK
      • Vars
        • K(d);P-FLIGHT,XR(I)::QAR1(H)
      • Refutation
        • B(j);XR(I)
    • Try
      • R(I);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR1(H)
      • Refutation
        • S(i);P_SPINS(i)
    • Try
      • Q(H);CHECK
      • Refutation
        • S(g);XQ(H)
  • Actual
    • S(E);
    • Threat
      • QAB1(H)
    • Vars
      • Q(a);XB(D)::S(A),XQ(a)
      • R(c);S_CUTB(j)::S(A),XP(b)
      • R(c);N_GUARD::B(C),XR(c)
      • B(j);S_CUTR(c)::S(E)
      • S(i);N_GUARD::QAR2(H),XS(i)
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