MESON Chess Problem Database

Problem Display
PID: 7234 (N5Bq/rPpR1Rnp/b1p1k3/1P5r/1Np5/1QB5/7b/1K6 w - - 0 1)

Heinonen, Unto

1st Prize, Hannelius-80 JT, 1999

N5Bq/rPpR1Rnp/b1p1k3/1P5r/1Np5/1QB5/7b/1K6

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rh3
      • 2.Qxc4#
    • 1...Re5
      • 2.Sxc7#
    • 1...Rf5
      • 2.Rfe7#
    • 1...Rh6
      • 2.Qxc4#
    • 1...Bg1
      • 2.Sxc7#
    • 1...Be5
      • 2.Qxc4#
    • 1...Sf5
      • 2.Rfe7#
      • 2.Qxc4#
  • Tries
    • 1.Qc2?
      • threat
        • 2.Rfe7#
      • 1...Re5
        • 2.Sxc7#
      • 1...Be5!
    • 1.bxc6?
      • threat
        • 2.Rf6#
      • 1...Re5
        • 2.Sxc7#
      • 1...Be5!
    • 1.b8S?
      • threat
        • 2.Rf6#
      • 1...Be5
        • 2.Qxc4#
      • 1...Re5!
  • Keys
    • 1.Be5!
      • threat
        • 2.Rde7#
      • 1...Kxe5
        • 2.Qe3#
      • 1...Rxe5
        • 2.Sxc7#
      • 1...Bxe5
        • 2.Qxc4#
      • 1...Sf5
        • 2.Rfe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(c);N_GUARD::QAB(B),XP(b)
    • R(c);S_CUTB(a)::S(I),XP(h)
    • R(c);SBLOCK::B(J)+R(H),DCHECK
    • B(a);N_GUARD::S(I),XP(h)
    • B(a);S_CUTR(c)::QAB(B),XP(b)
  • Tries
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • B(J)+R(H),DCHECK
      • Vars
        • R(c);S_CUTB(a)::S(I),XP(h)
      • Refutation
        • B(a);
    • Try
      • P(E);XP(e)
      • Threat
        • B(J)+R(H),DCHECK
      • Vars
        • R(c);S_CUTB(a)::S(I),XP(h)
      • Refutation
        • B(a);
    • Try
      • P(F);
      • Threat
        • B(J)+R(H),DCHECK
      • Vars
        • B(a);S_CUTR(c)::QAB(B),XP(b)
      • Refutation
        • R(c);
  • Actual
    • B(C);
    • Threat
      • R1(G)
    • Vars
      • K(f);N_SPINP(b),OGATEB,P-FLIGHT,XB(C)::QAR2(B)
      • R(c);SBLOCK,XB(C)::S(I),XP(h)
      • B(a);SBLOCK,XB(C)::QAB(B),XP(b)
      • S(i);SBLOCK::B(J)+R(H),DCHECK
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