MESON Chess Problem Database

Problem Display
PID: 142947 (4B3/6pK/4ppRb/5kr1/2pPp3/2P3pP/3Q1P2/5N2 w - - 0 1)

Tyrkko, Timo

HM., Ojanen-50 JT, 1966

4B3/6pK/4ppRb/5kr1/2pPp3/2P3pP/3Q1P2/5N2

#2

9 + 9

422 Suomen Tehtavaniekat 1992

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.hxg4#
    • 1...Rh5
      • 2.Sxg3#
    • 1...Rxg6
      • 2.Bxg6#
    • 1...gxf2
      • 2.Qxf2#
    • 1...e5
      • 2.Bd7#
  • Tries
    • 1.Rxg5+?
      • 1...Bxg5
        • 2.Sxg3#
        • 2.Bg6#
      • 1...fxg5!
    • 1.Qe3?
      • 1...Rxg6
        • 2.Bxg6#
      • 1...gxf2
        • 2.Qxf2#
      • 1...e5
        • 2.Bd7#
      • 1...Rg4
        • 2.hxg4#
      • 1...Rh5
        • 2.Sxg3#
      • 1...g2!
  • Keys
    • 1.fxg3!
      • threat
        • 2.Se3#
        • 2.Qf4#
        • 2.Qf2#
      • 1...Rxg3
        • 2.Sxg3#
      • 1...Rxg6
        • 2.Bxg6#
      • 1...e3
        • 2.Qc2#
      • 1...e5
        • 2.Bd7#
      • 1...Rg4
        • 2.hxg4#
      • 1...Rh5
        • 2.g4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);OGATE::P(E),XR(e)
    • R(e);N_GUARD::S(A),XP(a)
    • R(e);OGATE,XR(G)::B(I),XR(e)
    • P(a);OGATE,XP(C)::QAR(B),XP(a)
    • P(f);OGATEB::B(I)
  • Tries
    • Try
      • R(G);CHECK,XR(e)
      • Refutation
        • P(g);XR(G)
    • Try
      • Q(B);
      • Vars
        • R(e);OGATE,XR(G)::B(I),XR(e)
        • P(a);OGATE,XP(C)::QAR(B),XP(a)
        • P(f);OGATEB::B(I)
        • R(e);OGATE::P(E),XR(e)
        • R(e);N_GUARD::S(A),XP(a)
      • Refutation
        • P(a);
  • Actual
    • P(C);XP(a)
    • Threat
      • DUALS(3)
    • Vars
      • R(e);XP(C)::S(A),XR(e)
      • R(e);OGATE,XR(G)::B(I),XR(e)
      • P(c);OGATEB::QAB(B)
      • P(f);OGATEB::B(I)
      • R(e);OGATE::P(E),XR(e)
      • R(e);N_GUARD::P(C)
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