MESON Chess Problem Database

Problem Display
PID: 243764 (r3R2r/2B1N3/1p3p2/1NpR2p1/1pP1k1P1/8/n3B2p/4K2b w - - 0 1)

Berg, Wolfgang

stern, 1991

r3R2r/2B1N3/1p3p2/1NpR2p1/1pP1k1P1/8/n3B2p/4K2b

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Sf5#
    • 1...Ra3
      • 2.Sg8#
    • 1...Ra4
      • 2.Sg8#
    • 1...Ra5
      • 2.Sg8#
    • 1...Ra6
      • 2.Sg8#
    • 1...Ra7
      • 2.Sg8#
    • 1...Rh3
      • 2.Sc8#
    • 1...Rh4
      • 2.Sc8#
    • 1...Rh5
      • 2.Sc8#
    • 1...Rh6
      • 2.Sc8#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Bd3#
      • 1...Ra3
        • 2.Sg8#
      • 1...Rh3
        • 2.Sc8#
      • 1...Sc1!
    • 1.Rd4+?
      • 1...Ke3
        • 2.Sd5#
        • 2.Sf5#
      • 1...cxd4!
    • 1.Re5+?
      • 1...Kf4
        • 2.Re6#
      • 1...fxe5!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Re6#
      • 1...Ke3
        • 2.Sd5#
      • 1...Kf4
        • 2.Re6#
      • 1...Ke5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • K(e);P-FLIGHT::R(I)+S(H),DCHECK
    • R(j);N_GUARD::R(I)+S(H)
    • R(k);N_GUARD::R(I)+S(H)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • B(B)
      • Vars
        • R(j);N_GUARD::R(I)+S(H)
        • R(k);N_GUARD::R(I)+S(H)
      • Refutation
        • S(b);
    • Try
      • R(F);CHECK
      • Refutation
        • P(f);XR(F)
    • Try
      • R(F);CHECK
      • Vars
        • K(e);P-FLIGHT::B(G)+R(F)
      • Refutation
        • P(i);XR(F)
  • Actual
    • R(F);
    • Threat
      • R(F)
    • Vars
      • K(e);P-FLIGHT::R(I)+S(H),DCHECK
      • K(e);P-FLIGHT::B(G)+R(F)
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