MESON Chess Problem Database

Problem Display
PID: 196451 (b3R3/8/4Br1n/1p2N2N/r7/2PPk3/4PbQ1/2nK4 w - - 0 1)

Myllyniemi, Matti Arvo

Suomen Shakki, 1984

b3R3/8/4Br1n/1p2N2N/r7/2PPk3/4PbQ1/2nK4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Sc4#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Sc4#
        • 2.Sg4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rc4
        • 2.Sxc4#
        • 2.Sg4#
      • 1...Rg4
        • 2.Sc4#
        • 2.Sxg4#
      • 1...Re6
        • 2.Qf3#
      • 1...Sg4
        • 2.Sc4#
        • 2.Sxg4#
      • 1...Sxe2!
    • 1.Bf5?
      • threat
        • 2.Sc4#
        • 2.Sg4#
      • 1...Re4
        • 2.Qf3#
      • 1...Rc4
        • 2.Sxc4#
        • 2.Sg4#
      • 1...Rg4
        • 2.Sc4#
        • 2.Sxg4#
      • 1...Be4
        • 2.Qg5#
      • 1...Sg4
        • 2.Sc4#
        • 2.Sxg4#
      • 1...Re6!
  • Keys
    • 1.Bc4!
      • threat
        • 2.Sg4#
      • 1...Re6
        • 2.Qg5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sg4
        • 2.Sxg4#

There are these versions: 255108

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(e);N_GUARD,S_CUTR(d)::S(F)
  • Tries
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);N_GUARD::QAR1(C),XR(d)
        • R(f);N_GUARD::QAR1(C)
      • Refutation
        • S(a);XP(B)
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);S_CUTB(h)::QAR1(C)
        • B(h);S_CUTR(d)::QAB(C)
      • Refutation
        • R(f);
  • Actual
    • B(H);
    • Threat
      • R(I)+S(F),DCHECK
    • Vars
      • R(f);N_GUARD::QAB(C)
      • B(h);N_GUARD::QAR1(C),XB(h)
      • S(g);::R(I)+S(F),DCHECK,XS(g)
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