MESON Chess Problem Database

Problem Display
PID: 230592 (r7/rpNnQ3/pk1p4/p1RP1n2/3p4/N5B1/1K6/2R5 w - - 0 1)

Prins, Hendrik

Schweizerische Schachzeitung, 1986

r7/rpNnQ3/pk1p4/p1RP1n2/3p4/N5B1/1K6/2R5

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Qxd6#
    • 1...Sxg3
      • 2.Qxd6#
    • 1...Sh4
      • 2.Qxd6#
    • 1...Sh6
      • 2.Qxd6#
    • 1...Sg7
      • 2.Qxd6#
    • 1...Sxc5
      • 2.Sc4#
    • 1...dxc5
      • 2.Sc4#
  • Tries
    • 1.Be1?
      • threat
        • 2.Bxa5#
      • 1...Sxc5
        • 2.Sc4#
      • 1...a4
        • 2.Ba5#
      • 1...dxc5!
    • 1.Qd8?
      • threat
        • 2.Sxa8#
      • 1...Rb8
        • 2.Sa8#
      • 1...Rc8
        • 2.Sa8#
      • 1...Rxd8!
    • 1.Qe1?
      • threat
        • 2.Qxa5#
      • 1...dxc5
        • 2.Sc4#
      • 1...a4
        • 2.Qb4#
        • 2.Qa5#
      • 1...Sxc5!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sc4#
      • 1...Sxc5
        • 2.Qc7#
      • 1...dxc5
        • 2.Bc7#
      • 1...Se3
        • 2.Qxd6#
      • 1...Se5
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • S(c);N_GUARD::QAR2(H),XP(f)
    • S(c);N_GUARD,XB(D)::QAR2(H),XP(f)
    • S(i);SBLOCK,XR(E)::S(C)
    • P(f);XR(E)::S(C)
  • Tries
    • Try
      • B(D);
      • Threat
        • B(D),XP(b)
      • Vars
        • S(i);SBLOCK,XR(E)::S(C)
        • P(b);::B(D)
      • Refutation
        • P(f);XR(E)
    • Try
      • Q(H);
      • Threat
        • QAB(H)+S(G),DCHECK,XR(j)
      • Vars
        • R(j);::QAB(H)+S(G),DCHECK
      • Refutation
        • R(j);XQ(H)
    • Try
      • Q(H);
      • Threat
        • QAB1(H),XP(b)
      • Vars
        • P(f);SBLOCK,XR(E)::S(C)
      • Refutation
        • S(i);XR(E)
  • Actual
    • S(G);
    • Threat
      • S(C)
    • Vars
      • S(i);OGATE,XR(E)::QAB1(H)
      • P(f);OGATE,XR(E)::B(D)
      • S(c);N_GUARD::QAR2(H),XP(f)
      • S(i);OGATE::QAB1(H)
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