MESON Chess Problem Database

Problem Display
PID: 18412 (1rBR4/KPp1B3/n1k2n2/2pp1N2/r2qp3/N7/2Q5/8 w - - 0 1)

Rice, John Michael

The Problemist, 1955

1rBR4/KPp1B3/n1k2n2/2pp1N2/r2qp3/N7/2Q5/8

#2

8 + 10

3174 The Two-move Chess Problem Tradition and Development 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qxa4#
    • 1...Qg1
      • 2.Qxa4#
    • 1...Qf2
      • 2.Qxa4#
    • 1...Qc3
      • 2.Qxa4#
    • 1...Qe3
      • 2.Qxa4#
    • 1...Qe5
      • 2.Qxa4#
    • 1...Qd2
      • 2.Qxa4#
    • 1...Rxa3
      • 2.Sxd4#
    • 1...Ra5
      • 2.Sxd4#
    • 1...Rxb7+
      • 2.Bxb7#
    • 1...Ra8+
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Sb4+
      • 2.Qxa4#
    • 1...Sg4
      • 2.Bd7#
    • 1...Sh5
      • 2.Bd7#
    • 1...Sd7
      • 2.Bxd7#
    • 1...Sh7
      • 2.Bd7#
    • 1...Se8
      • 2.Bd7#
    • 1...Sg8
      • 2.Bd7#
    • 1...c4+
      • 2.Sxd4#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Se7#
      • 1...Rxb7+
        • 2.Bxb7#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sb4+
        • 2.Qxa4#
      • 1...c4+
        • 2.Sxd4#
      • 1...Rxa3
        • 2.Sxd4#
      • 1...Qe5
        • 2.Qxa4#
      • 1...Sd7
        • 2.Bxd7#
      • 1...Sg8
        • 2.Bd7#
      • 1...cxd6!
    • 1.Bxf6?
      • threat
        • 2.Se7#
        • 2.Bd7#
      • 1...Rxb7+
        • 2.Bxb7#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sb4+
        • 2.Qxa4#
      • 1...Qxf6
        • 2.Bd7#
        • 2.Qxa4#
      • 1...Rxa3
        • 2.Sxd4#
        • 2.Bd7#
      • 1...Rxc8
        • 2.Se7#
      • 1...Qe5
        • 2.Bd7#
        • 2.Qxa4#
      • 1...c4+!
  • Keys
    • 1.Bf8!
      • threat
        • 2.Se7#
      • 1...Rxb7+
        • 2.Bxb7#
      • 1...Ra8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Sb4+
        • 2.Qxa4#
      • 1...c4+
        • 2.Sxd4#
      • 1...Rxa3
        • 2.Sxd4#
      • 1...Qe5
        • 2.Qxa4#
      • 1...Sd7
        • 2.Bxd7#
      • 1...Sg8
        • 2.Bd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::QAB(A),XR(a)
    • Q(b);N_GUARD,N_SPINP(d)::QAB(A),XR(a)
    • R(a);N_GUARD,XS(B)::S(C),XQ(b)
    • R(a);N_GUARD::S(C),XQ(b)
    • R(j);CHECK,OGATE,XP(E)::B(G),XR(j)
    • R(j);CHECK,OGATE::PXR(j)=Q
    • S(f);CHECK,S_CUTQ(b)::QAB(A),XR(a)
    • S(h);N_GUARD::B(G)
    • S(h);N_GUARD::B(G),XS(h)
    • P(d);CHECK,S_CUTR(a)::S(C),XQ(b)
  • Tries
    • Try
      • B(F);
      • Threat
        • S(C)
      • Vars
        • R(j);CHECK,OGATE,XP(E)::B(G),XR(j)
        • R(j);CHECK,OGATE::PXR(j)=Q
        • S(f);CHECK,S_CUTQ(b)::QAB(A),XR(a)
        • P(d);CHECK,S_CUTR(a)::S(C),XQ(b)
        • R(a);N_GUARD,XS(B)::S(C),XQ(b)
        • Q(b);N_GUARD::QAB(A),XR(a)
        • S(h);N_GUARD::B(G),XS(h)
        • S(h);N_GUARD::B(G)
      • Refutation
        • P(i);XB(F)
    • Try
      • B(F);XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • R(j);CHECK,OGATE,XP(E)::B(G),XR(j)
        • R(j);CHECK,OGATE::PXR(j)=Q
        • S(f);CHECK,S_CUTQ(b)::QAB(A),XR(a)
        • R(j);XB(G)::S(C)
      • Refutation
        • P(d);CHECK
  • Actual
    • B(F);
    • Threat
      • S(C)
    • Vars
      • R(j);CHECK,OGATE,XP(E)::B(G),XR(j)
      • R(j);CHECK,OGATE::PXR(j)=Q
      • S(f);CHECK,S_CUTQ(b)::QAB(A),XR(a)
      • P(d);CHECK,S_CUTR(a)::S(C),XQ(b)
      • R(a);N_GUARD,XS(B)::S(C),XQ(b)
      • Q(b);N_GUARD::QAB(A),XR(a)
      • S(h);N_GUARD::B(G),XS(h)
      • S(h);N_GUARD::B(G)
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