MESON Chess Problem Database

Problem Display
PID: 116358 (2q5/6p1/2N3Q1/2r5/R1BB1k2/1n2p1Nn/6PK/3b4 w - - 0 1)

Hermanson, Halvar

Boletim da UBP, 1967

2q5/6p1/2N3Q1/2r5/R1BB1k2/1n2p1Nn/6PK/3b4

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Be5#
    • 1...Re5
      • 2.Bxe5#
    • 1...Rg5
      • 2.Qe4#
    • 1...Bc2
      • 2.Se2#
    • 1...Be2
      • 2.Sxe2#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Be5#
      • 1...Qxc6
        • 2.Qf5#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...e2
        • 2.Sh5#
      • 1...Rxc6!
    • 1.Be6?
      • threat
        • 2.Be5#
      • 1...Rxc6
        • 2.Qf5#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Re5
        • 2.Bxe5#
      • 1...e2
        • 2.Qg4#
      • 1...Qxc6!
  • Keys
    • 1.Be2!
      • threat
        • 2.Be5#
      • 1...Qxc6
        • 2.Qg4#
      • 1...Rxc6
        • 2.Sh5#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Re5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD,XB(E)::B(F)
    • R(f);N_GUARD::B(F),XR(f)
    • R(f);SBLOCK::QAR1(H)
    • B(a);N_GUARD::S(C)
    • B(a);N_GUARD::S(C),XB(a)
  • Tries
    • Try
      • B(E);
      • Threat
        • R(D)+B(F),DCHECK
      • Vars
        • Q(h);N_GUARD,XS(G)::QAR1(H)
        • S(b);OGATE,P_SPINS(b),XB(F)::R(D),XS(b)
        • P(c);S_CUTB(a)::S(C)
      • Refutation
        • R(f);XS(G)
    • Try
      • B(E);
      • Threat
        • R(D)+B(F),DCHECK
      • Vars
        • R(f);N_GUARD,XS(G)::QAR1(H)
        • S(b);OGATE,P_SPINS(b),XB(F)::R(D),XS(b)
        • R(f);::R(D)+B(F),DCHECK,XR(f)
        • P(c);S_CUTB(a)::QAR1(H)
      • Refutation
        • Q(h);XS(G)
  • Actual
    • B(E);
    • Threat
      • R(D)+B(F),DCHECK
    • Vars
      • Q(h);N_GUARD,XS(G)::QAR1(H)
      • R(f);N_GUARD,XS(G)::S(C)
      • S(b);OGATE,P_SPINS(b),XB(F)::R(D),XS(b)
      • R(f);::R(D)+B(F),DCHECK,XR(f)
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