MESON Chess Problem Database

Problem Display
PID: 97912 (1Q2n3/b3R2b/3P4/2pP4/2PkNNR1/2p4r/2p2P2/2K2B2 w - - 0 1)

Haring, Jacobus

Problemas, 1987

1Q2n3/b3R2b/3P4/2pP4/2PkNNR1/2p4r/2p2P2/2K2B2

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd6
      • 2.Qh8#
    • 1...Sc7
      • 2.Qh8#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sb3#
        • 2.Sg6#
      • 1...Sxd6
        • 2.Sb3#
        • 2.Qh8#
      • 1...Rd3
        • 2.Se2#
        • 2.Sg6#
      • 1...Re3
        • 2.Sb3#
        • 2.fxe3#
      • 1...Rf3
        • 2.Sb3#
        • 2.Sxf3#
      • 1...Rg3
        • 2.Sb3#
      • 1...Rh4
        • 2.Sb3#
        • 2.Sf3#
      • 1...Bd3
        • 2.Se2#
        • 2.Sxd3#
      • 1...Be4
        • 2.Sb3#
        • 2.Rxe4#
      • 1...Bf5
        • 2.Sb3#
      • 1...Bg6
        • 2.Sb3#
        • 2.Sxg6#
      • 1...Sf6
        • 2.Sb3#
      • 1...cxd2+!
    • 1.Sxc5?
      • threat
        • 2.Sb3#
      • 1...Kxc5
        • 2.Se6#
      • 1...Bxc5
        • 2.Sg6#
      • 1...Bd3
        • 2.Sfxd3#
      • 1...Rd3!
  • Keys
    • 1.Sxc3!
      • threat
        • 2.Sb5#
      • 1...Kxc3
        • 2.Qb2#
      • 1...Rxc3
        • 2.Sg6#
      • 1...Sxd6
        • 2.Qh8#
      • 1...Rd3
        • 2.Sfe2#
      • 1...Bd3
        • 2.Sfe2#
      • 1...Sc7
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE,XP(I)::QAB(K)
    • S(h);OGATE::QAB(K)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::S(E)
        • B(g);::S(E)
        • S(h);::S(E)
      • Refutation
        • P(b);CHECK,XS(E)
    • Try
      • S(E);XP(e)
      • Threat
        • S(E)
      • Vars
        • K(d);S_FLIGHT,XS(E)::S(F)
        • B(f);SBLOCK,XS(E)::R(G)+S(F)
        • B(g);N_GUARD::R(G)+S(F),XB(g)
      • Refutation
        • R(c);
  • Actual
    • S(E);XP(b)
    • Threat
      • S(E)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(E)::QAB1(K)
      • R(c);SBLOCK,XS(E)::R(G)+S(F)
      • S(h);OGATE,XP(I)::QAB(K)
      • R(c);SBLOCK::R(G)+S(F),DCHECK
      • B(g);SBLOCK::R(G)+S(F),DCHECK
      • S(h);OGATE::QAB(K)
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