MESON Chess Problem Database

Problem Display
PID: 106179 (Qn6/1Np2K2/1p6/3kB1p1/3P4/nP2p2p/8/5B2 w - - 0 1)

Hronec, Jaroslav

Praca, 1954

Qn6/1Np2K2/1p6/3kB1p1/3P4/nP2p2p/8/5B2

#2

7 + 8

6490 yacpdb 2009
5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sd6#
    • 1...Kc6
      • 2.Sc5#
    • 1...h2
      • 2.Bg2#
  • Tries
    • 1.Sa5+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...c6!
    • 1.Sd8+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...c6!
    • 1.Be2?
      • threat
        • 2.Bf3#
      • 1...Ke4
        • 2.Sd6#
      • 1...Kc6
        • 2.Sc5#
      • 1...g4!
    • 1.Bc4+?
      • 1...Ke4
        • 2.Sd6#
      • 1...Kc6
        • 2.Sc5#
      • 1...Sxc4!
  • Keys
    • 1.Bxh3!
      • threat
        • 2.Bg2#
      • 1...Ke4
        • 2.Sc5#
      • 1...Kc6
        • 2.Sd6#

This anticipates 96740(1965)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(d);S_FLIGHT::QAB(G)+S(E),DCHECK
    • K(d);S_FLIGHT::QAB(G)+S(E)
    • P(c);N_GUARD::B(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB1(G),XS(h)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • S(E);CHECK
      • Vars
        • S(h);N_GUARD,P_SPINS(h)::QAB1(G),XS(h)
      • Refutation
        • P(g);P_SPINP(g)
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • K(d);S_FLIGHT::QAB(G)+S(E),DCHECK
        • K(d);S_FLIGHT::QAB(G)+S(E)
      • Refutation
        • P(e);
    • Try
      • B(A);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB(G)+S(E),DCHECK
        • K(d);S_FLIGHT::QAB(G)+S(E)
      • Refutation
        • S(a);XB(A)
  • Actual
    • B(A);XP(c)
    • Threat
      • B(A)
    • Vars
      • K(d);S_FLIGHT::QAB(G)+S(E),DCHECK
      • K(d);S_FLIGHT::QAB(G)+S(E)
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