MESON Chess Problem Database

Problem Display
PID: 60314 (3nrn2/1pp1pPpP/1RP1kPBP/3pBp2/3P1P2/3R1P2/3NQK2/8 w - - 0 1)

Loyd, Sam

Sam Loyd and His Chess Problems, 1913

3nrn2/1pp1pPpP/1RP1kPBP/3pBp2/3P1P2/3R1P2/3NQK2/8

#2

15 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...exf6
      • 2.Bxc7#
      • 2.fxe8Q#
      • 2.fxe8R#
    • 1...gxf6
      • 2.Bxc7#
  • Tries
    • 1.Bd6+?
      • 1...Kxd6
        • 2.Qe5#
        • 2.fxe8S#
      • 1...Kxf6!
    • 1.Qe4?
      • threat
        • 2.Qxf5#
      • 1...dxe4
        • 2.d5#
      • 1...fxe4
        • 2.f5#
      • 1...exf6
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Sxg6!
    • 1.fxe8Q?
      • threat
        • 2.Qxe7#
      • 1...gxf6
        • 2.Bxc7#
      • 1...Sxg6!
    • 1.fxe8R?
      • threat
        • 2.Rxe7#
      • 1...gxf6
        • 2.Bxc7#
      • 1...Sxg6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sc5#
        • 2.Sg5#
      • 1...Sxc6
        • 2.Sc5#
      • 1...Sxf7
        • 2.Sc5#
      • 1...Sxg6
        • 2.Sg5#
      • 1...Sxh7
        • 2.Sc5#
      • 1...dxe4
        • 2.Qa2#
        • 2.d5#
      • 1...fxe4
        • 2.f5#
      • 1...bxc6
        • 2.Sc5#
      • 1...cxb6
        • 2.Sg5#
      • 1...exf6
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...gxf6
        • 2.Sc5#
      • 1...gxh6
        • 2.Sc5#
      • 1...Sd7
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • P(g);SBLOCK,XP(K)::QAR(B)+B(H),XP(e)
  • Tries
    • Try
      • B(H);CHECK
      • Refutation
        • K(c);P-FLIGHT,XP(K)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • P(a);OGATE,XQ(B)::P(F)
        • P(b);OGATE,XQ(B)::P(G)
        • P(f);XP(K)::PXR(i)=Q
      • Refutation
        • S(j);XB(L)
    • Try
      • P(N);P_PINP(f),XR(i)
      • Threat
        • QAR1(N),XP(f)
      • Vars
        • P(g);SBLOCK,XP(K)::QAR(B)+B(H),XP(e)
      • Refutation
        • S(j);XB(L)
    • Try
      • P(N);P_PINP(f),XR(i)
      • Threat
        • R1(N),XP(f)
      • Vars
        • P(g);SBLOCK,XP(K)::QAR(B)+B(H),XP(e)
      • Refutation
        • S(j);XB(L)
  • Actual
    • S(A);
    • Threat
      • DUALS(2)
    • Vars
      • S(h);P_SPINS(h),XP(J)::S(A)
      • S(h);XP(N)::S(A)
      • S(j);XB(L)::S(A)
      • S(j);XP(O)::S(A)
      • P(b);OGATE,XS(A)::P(G)
      • P(d);P_SPINP(d),XP(J)::S(A)
      • P(e);XR(I)::S(A)
      • P(f);XP(K)::PXR(i)=Q
      • P(g);XP(K)::S(A)
      • P(g);XP(M)::S(A)
      • S(j);::S(A)
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