MESON Chess Problem Database

Problem Display
PID: 234121 (8/1p3PQ1/2qp1R1K/N1PpPP2/1B1k3p/3NpP2/1nP4n/8 w - - 0 1)

Rice, John Michael

3rd HM., Die Schwalbe, 2020

8/1p3PQ1/2qp1R1K/N1PpPP2/1B1k3p/3NpP2/1nP4n/8

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Sb3#
    • 1...Sf1
      • 2.Qg4#
    • 1...Sxf3
      • 2.Qg4#
    • 1...Sg4+
      • 2.Qxg4#
    • 1...e2
      • 2.Qg1#
  • Tries
    • 1.Re6?
      • threat
        • 2.exd6#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Sxd3
        • 2.c3#
      • 1...Sxf3
        • 2.Qg4#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Sc4
        • 2.Sb3#
      • 1...dxc5!
    • 1.Rg6?
      • threat
        • 2.exd6#
        • 2.e6#
      • 1...Sg4+
        • 2.Rxg4#
      • 1...Sxd3
        • 2.c3#
      • 1...Sxf3
        • 2.Rg4#
      • 1...dxc5
        • 2.e6#
      • 1...dxe5
        • 2.Qxe5#
      • 1...Qe8
        • 2.e6#
      • 1...Sc4
        • 2.Sb3#
      • 1...e2!
    • 1.Qg3?
      • threat
        • 2.Qf4#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Sxd3
        • 2.c3#
      • 1...dxe5
        • 2.Qxe5#
      • 1...hxg3!
    • 1.exd6?
      • threat
        • 2.Re6#
        • 2.Rg6#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Qxd6
        • 2.Rxd6#
      • 1...Sxf3
        • 2.Qg4#
      • 1...e2
        • 2.Re6#
        • 2.Qg1#
      • 1...Qe8
        • 2.Re6#
      • 1...Sc4
        • 2.Sb3#
      • 1...Sxd3!
    • 1.e6?
      • threat
        • 2.Rg6#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Sxf3
        • 2.Qg4#
      • 1...e2
        • 2.Qg1#
      • 1...Sc4
        • 2.Sb3#
      • 1...Sxd3!
  • Keys
    • 1.Rxd6!
      • threat
        • 2.e6#
      • 1...Qxd6+
        • 2.exd6#
      • 1...Sg4+
        • 2.Qxg4#
      • 1...Sxd3
        • 2.c3#
      • 1...Sxf3
        • 2.Qg4#
      • 1...e2
        • 2.Qg1#
      • 1...Sc4
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);SBLOCK::S(E)
    • S(b);N_GUARD::QAR(L)
    • S(b);N_GUARD,XP(C)::QAR(L)
    • S(b);CHECK,N_GUARD::QAR(L),XS(b)
    • P(c);OGATEB::QAB(L)
  • Tries
    • Try
      • R(I);
      • Threat
        • QAB(L)+P(G),XP(h)
      • Vars
        • S(b);CHECK,N_GUARD::QAR(L),XS(b)
        • S(a);SBLOCK,XS(B)::P(A)
        • S(b);N_GUARD,XP(C)::QAR(L)
        • P(h);OGATE,P_PINR(I),P_SPINP(h),XP(G)::QAB1(L),XP(h)
        • S(a);SBLOCK::S(E)
      • Refutation
        • P(h);P_PINR(I),XP(F)
    • Try
      • R(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,N_GUARD::R(I),XS(b)
        • S(a);SBLOCK,XS(B)::P(A)
        • S(b);N_GUARD,XP(C)::R(I)
        • P(h);P_PINR(I),XP(F)::QAB(L)+P(G)
        • P(h);OGATE,P_PINR(I),P_SPINP(h),XP(G)::QAB1(L),XP(h)
        • Q(g);::QAB(L)+P(G)
        • S(a);SBLOCK::S(E)
      • Refutation
        • P(c);
    • Try
      • Q(L);
      • Threat
        • QAR2(L)
      • Vars
        • S(b);CHECK,N_GUARD::QAR(L),XS(b)
        • S(a);SBLOCK,XS(B)::P(A)
        • P(h);OGATE,P_PINR(I),XP(G)::QAB1(L),XP(h)
      • Refutation
        • P(e);XQ(L)
    • Try
      • P(G);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,N_GUARD::QAR(L),XS(b)
        • Q(g);OGATE,P_PINR(I),XP(G)::QAB(L)+R(I),XQ(g)
        • S(b);N_GUARD,XP(C)::QAR(L)
        • Q(g);::QAB(L)+R(I)
        • S(a);SBLOCK::S(E)
      • Refutation
        • S(a);XS(B)
    • Try
      • P(G);
      • Threat
        • QAB(L)+R(I)
      • Vars
        • S(b);CHECK,N_GUARD::QAR(L),XS(b)
        • S(b);N_GUARD,XP(C)::QAR(L)
        • P(c);OGATEB::QAB(L)
        • S(a);SBLOCK::S(E)
      • Refutation
        • S(a);XS(B)
  • Actual
    • R(I);P_PINP(f),P_SPINR(I),XP(h)
    • Threat
      • QAB(L)+P(G)
    • Vars
      • Q(g);CHECK,N_SPINP(f),OGATE,XR(I)::QAB(L)+P(G),XQ(g)
      • S(b);CHECK,N_GUARD::QAR(L),XS(b)
      • S(a);SBLOCK,XS(B)::P(A)
      • S(b);N_GUARD,XP(C)::QAR(L)
      • P(c);OGATEB::QAB(L)
      • S(a);SBLOCK::S(E)
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