MESON Chess Problem Database

Problem Display
PID: 157330 (1K6/BPQ5/1PR3N1/3P1p2/2Bknq1R/2p2P2/5P1b/1Nr5 w - - 0 1)

Hjelle, David

Land og Folk, 1979

1K6/BPQ5/1PR3N1/3P1p2/2Bknq1R/2p2P2/5P1b/1Nr5

#2

13 + 7

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc7+
      • 2.bxc7#
    • 1...Sd2
      • 2.Qe5#
    • 1...Sxf2
      • 2.Qe5#
    • 1...Sg3
      • 2.Qe5#
    • 1...Sg5
      • 2.Qe5#
    • 1...Sd6
      • 2.Qg7#
    • 1...Sf6
      • 2.Qe5#
  • Keys
    • 1.Sa3!
      • threat
        • 2.Sb5#
      • 1...Qxc7+
        • 2.bxc7#
      • 1...Sxf2
        • 2.Qe5#
      • 1...Rb1
        • 2.Sc2#
      • 1...Sc5
        • 2.Qe5#
      • 1...Sd6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(f);CHECK,OGATE,P_SPINS(e),XQ(L)::B(J)+P(G),XQ(f)
    • S(e);P_SPINQ(f)::QAB1(L)
    • S(e);P_SPINQ(f),XP(B)::QAB1(L)
    • S(e);N_PINQ(L),P_SPINQ(f)::QAB(L)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINS(e),XQ(L)::B(J)+P(G),XQ(f)
      • S(e);P_SPINQ(f),XP(B)::QAB1(L)
      • R(a);N_GUARD::S(A)
      • S(e);P_SPINQ(f)::QAB1(L)
      • S(e);N_PINQ(L),P_SPINQ(f)::QAB(L)
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