MESON Chess Problem Database

Problem Display
PID: 144917 (8/1Q2p2K/4P1R1/2p1pk2/2Rp4/6n1/2N3P1/b1B3n1 w - - 0 1)

van Dijk, Johannes

De Standaard, 1928

(First published on Tue Jan 10 1928)

8/1Q2p2K/4P1R1/2p1pk2/2Rp4/6n1/2N3P1/b1B3n1

#2

8 + 8

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sf1
      • 2.g4#
    • 1...Sh1
      • 2.g4#
    • 1...Se2
      • 2.g4#
    • 1...Se4
      • 2.g4#
    • 1...Sh5
      • 2.g4#
    • 1...d3
      • 2.Se3#
    • 1...e4
      • 2.Rxc5#
      • 2.Qd5#
  • Tries
    • 1.Se3+?
      • 1...Kf4
        • 2.Rg4#
      • 1...dxe3!
    • 1.Qe4+?
      • 1...Sxe4
        • 2.g4#
      • 1...Kxe4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Sxd4#
      • 1...Ke4
        • 2.Sb4#
      • 1...Se4
        • 2.g4#
      • 1...d3
        • 2.Se3#
      • 1...e4
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::QAR2(G),XS(b)
    • S(c);OGATE::P(C)
    • P(d);N_GUARD::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(g);P-FLIGHT,P_SPINP(d)::R1(F)
      • Refutation
        • P(d);XS(B)
    • Try
      • Q(G);CHECK
      • Vars
        • S(c);OGATE,SBLOCK,XQ(G)::P(C)
      • Refutation
        • K(g);P_SPINP(d),S_FLIGHT,XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+S(B),DCHECK,XP(d)
    • Vars
      • K(g);P_SPINP(d),S_FLIGHT::QAB(G)+S(B)
      • S(c);OGATE,SBLOCK::P(C)
      • P(d);::S(B)
      • P(f);OGATEB,SBLOCK::R(D),XP(e)
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