MESON Chess Problem Database

Problem Display
PID: 28597 (8/3K3p/8/3p3r/3nk3/Q4R2/1B4P1/1b2r3 w - - 0 1)

Shire, David J

British Chess Magazine, 1974

8/3K3p/8/3p3r/3nk3/Q4R2/1B4P1/1b2r3

#2

5 + 7

3256 David Shire Selected Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qe7#
    • 1...Rc1
      • 2.Qe3#
    • 1...Rd1
      • 2.Qe3#
    • 1...Rf1
      • 2.Qe3#
    • 1...Rg1
      • 2.Qe3#
    • 1...Reh1
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Sc2
      • 2.Qd3#
    • 1...Se2
      • 2.Qe3#
    • 1...Sxf3
      • 2.Qxf3#
  • Tries
    • 1.Rf4+?
      • 1...Ke5
        • 2.Qd6#
      • 1...Kxf4!
    • 1.Qb4?
      • threat
        • 2.Qxd4#
      • 1...Ke5
        • 2.Qe7#
        • 2.Qxd4#
      • 1...Rd1!
    • 1.Qe7+?
      • 1...Re5
        • 2.Qh4#
      • 1...Se6!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...Bxd3!
    • 1.Qa4?
      • threat
        • 2.Qxd4#
      • 1...Ke5
        • 2.Qxd4#
      • 1...Rd1!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qxd4#
      • 1...Ke5
        • 2.Qxd4#
      • 1...Sxf3
        • 2.Qxf3#
      • 1...Rd1
        • 2.Qe3#
      • 1...Sc2
        • 2.Qd3#
      • 1...Se2
        • 2.Qe3#
      • 1...Sb3
        • 2.Qxe1#
      • 1...Sb5
        • 2.Qxe1#
      • 1...Sf5
        • 2.Qe5#
      • 1...Sc6
        • 2.Qxe1#
      • 1...Se6
        • 2.Qxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • K(d);P-FLIGHT,P_SPINS(c)::QAR2(C)
    • R(b);N_GUARD::QAR1(C)
    • R(b);N_GUARD::QAR1(C),XR(b)
    • S(c);S_CUTB(a)::QAB1(C)
    • S(c);S_CUTR(b)::QAR1(C)
    • S(c);OGATE,XR(D)::QAB1(C),XS(c)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(c)::QAB1(C)
      • Refutation
        • K(d);P-FLIGHT,XR(D)
    • Try
      • Q(C);P_PINS(c)
      • Threat
        • QAR1(C),XS(c)
      • Refutation
        • R(b);
    • Try
      • Q(C);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f),SBLOCK::QAR(C)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(C);CHECK
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);P_PINS(c)
      • Threat
        • QAR1(C),XS(c)
      • Vars
        • K(d);P-FLIGHT::QAB1(C),XS(c)
      • Refutation
        • R(b);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C),XS(c)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(c)::QAB1(C),XS(c)
      • S(c);OGATE,XR(D)::QAB1(C),XS(c)
      • R(b);N_GUARD::QAR1(C)
      • S(c);S_CUTB(a)::QAB1(C)
      • S(c);S_CUTR(b)::QAR1(C)
      • S(c);N_GUARD::QAR(C),XR(b)
      • S(c);OGATE::QAR1(C)
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