MESON Chess Problem Database

Problem Display
PID: 210408 (2K5/b3N1p1/2pR4/R1nbkN2/1B3p2/n1P1pPr1/B7/4Q3 w - - 0 1)

Larrain, Santiago

The Problemist, 1985

2K5/b3N1p1/2pR4/R1nbkN2/1B3p2/n1P1pPr1/B7/4Q3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf3
      • 2.Re6#
    • 1...Be4
      • 2.Re6#
    • 1...Be6+
      • 2.Rxe6#
  • Tries
    • 1.Qxe3+?
      • 1...Be4
        • 2.Re6#
        • 2.Qd4#
        • 2.Qxe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...fxe3!
  • Keys
    • 1.Sxe3!
      • threat
        • 2.Sc4#
      • 1...Be6+
        • 2.Rxe6#
      • 1...Kxd6
        • 2.S3f5#
      • 1...fxe3
        • 2.Qxg3#
      • 1...Bc4
        • 2.Sxc4#
      • 1...Be4
        • 2.Re6#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Se4
        • 2.Sxc6#
      • 1...Se6
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(f);N_GUARD,P_SPINS(e),XP(D)::R1(H)
    • B(f);N_GUARD,N_SPINP(b),P_SPINS(e)::R1(H)
    • B(f);CHECK,N_GUARD,P_SPINS(e)::R1(H),XB(f)
  • Tries
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • S(e);N_GUARD,P_SPINB(f),P_SPINS(e)::QAR1(A),XS(e)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • S(G);XP(b)
    • Threat
      • QAR(A)+S(G),DCHECK
    • Vars
      • B(f);CHECK,N_GUARD,P_SPINS(e)::R1(H),XB(f)
      • K(g);P_SPINS(e),S_FLIGHT,XR(H)::S(G)
      • P(d);OGATEB,P_SPINP(d),XS(G)::QAB(A),XR(c)
      • B(f);P_SPINS(e)::QAR(A)+S(G),DCHECK,XB(f)
      • B(f);N_GUARD,P_SPINS(e)::R1(H)
      • S(a);::QAR(A)+S(G),DCHECK,XS(a)
      • S(e);P_SPINB(f)::S(I),XP(h)
      • S(e);P_SPINB(f)::QAR(A)+S(G),DCHECK
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