MESON Chess Problem Database

Problem Display
PID: 102852 (2N2N2/5p1B/2n2k2/2K5/3P2R1/5n2/1R4b1/B7 w - - 0 1)

Hermanson, Halvar

Themes-64, 1971

2N2N2/5p1B/2n2k2/2K5/3P2R1/5n2/1R4b1/B7

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rf2?
      • 1...Sxd4
        • 2.Bxd4#
      • 1...Bf1
        • 2.Rxf3#
      • 1...Bh3
        • 2.Rxf3#
      • 1...Sb4
        • 2.d5#
      • 1...Sa5
        • 2.d5#
      • 1...Se5
        • 2.dxe5#
      • 1...Sa7
        • 2.d5#
      • 1...Se7
        • 2.d5#
      • 1...Sb8
        • 2.d5#
      • 1...Sd8
        • 2.d5#
      • 1...Bh1!
    • 1.d5?
      • threat
        • 2.Sd7#
      • 1...Ke5
        • 2.Sd7#
        • 2.Re2#
      • 1...Sg5
        • 2.Rf2#
        • 2.Rb6#
      • 1...Sce5
        • 2.Rb6#
      • 1...Sb8
        • 2.Rf2#
        • 2.Rb6#
      • 1...Sfe5!
  • Keys
    • 1.Rb6!
      • threat
        • 2.Rxc6#
      • 1...Sxd4
        • 2.Bxd4#
      • 1...Sg5
        • 2.d5#
      • 1...Se5
        • 2.dxe5#
      • 1...Se1
        • 2.d5#
      • 1...Sg1
        • 2.d5#
      • 1...Sd2
        • 2.d5#
      • 1...Sh2
        • 2.d5#
      • 1...Sh4
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);P_PINS(b)
      • Vars
        • S(c);OGATE,XP(C)::B(A),XS(c)
        • B(a);N_GUARD::R(B),XS(b)
        • S(c);N_GUARD::B(A)+P(C)
        • S(c);OGATE::P(C),XS(c)
      • Refutation
        • B(a);
    • Try
      • P(C);
      • Threat
        • S(H)
      • Vars
        • S(c);S_CUTS(b),S_CUTS(b)::R(B)
      • Refutation
        • S(b);
  • Actual
    • R(B);P_PINS(c)
    • Threat
      • R(B),XS(c)
    • Vars
      • S(b);N_SPINS(c),OGATE,P_SPINS(b),XP(C)::B(A),XS(b)
      • S(b);N_GUARD::B(A)+P(C)
      • S(b);OGATE::P(C),XS(b)
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