MESON Chess Problem Database

Problem Display
PID: 66143 (8/Q3p3/6N1/2p3p1/1pBkpp2/1K5b/3b1RNB/5n2 w - - 0 1)

Dittrich, Stefan

Pohlheim, Karl

4th HM., Schach, 1976

8/Q3p3/6N1/2p3p1/1pBkpp2/1K5b/3b1RNB/5n2

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qa1#
    • 1...Bd7
      • 2.Qxd7#
    • 1...Sxh2
      • 2.Rxd2#
    • 1...Se3
      • 2.Rxd2#
    • 1...Sg3
      • 2.Rxd2#
    • 1...f3
      • 2.Be5#
    • 1...g4
      • 2.Qd7#
    • 1...e6
      • 2.Qd7#
  • Tries
    • 1.Bg1?
      • threat
        • 2.Rxd2#
      • 1...Bc1
        • 2.Rd2#
      • 1...Be1
        • 2.Rd2#
      • 1...Bc3
        • 2.Rd2#
      • 1...Be3
        • 2.Qa1#
      • 1...e3!
    • 1.Qb8?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
        • 2.Qd6#
      • 1...Bxg2!
    • 1.Qc7?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
        • 2.Qd6#
      • 1...Bxg2!
    • 1.Qxe7?
      • threat
        • 2.Qd6#
        • 2.Qf6#
        • 2.Qe5#
        • 2.Qg7#
      • 1...Be6
        • 2.Qf6#
        • 2.Qg7#
      • 1...Se3
        • 2.Rxd2#
        • 2.Qf6#
        • 2.Qe5#
        • 2.Qg7#
      • 1...e3
        • 2.Qe5#
      • 1...Bxg2!
    • 1.Qa8?
      • threat
        • 2.Qd5#
      • 1...Be6
        • 2.Qh8#
      • 1...Se3
        • 2.Rxd2#
      • 1...e6
        • 2.Qd8#
      • 1...Bxg2!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sc2#
      • 1...Kxe3
        • 2.Qxc5#
      • 1...Bxe3
        • 2.Qa1#
      • 1...Sxe3
        • 2.Rxd2#
      • 1...fxe3
        • 2.Be5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(b);N_GUARD::QAB(G)
    • B(c);N_GUARD::QAR(G),XB(c)
    • S(a);N_GUARD,XB(C)::R(A),XB(b)
    • S(a);N_GUARD::R(A),XB(b)
    • P(g);OGATE::B(C)
    • P(i);S_CUTB(c)::QAR(G)
    • P(j);S_CUTB(c)::QAR(G)
  • Tries
    • Try
      • B(C);
      • Threat
        • B(C)+R(A),DCHECK,XB(b)
      • Vars
        • B(b);::B(C)+R(A),DCHECK
        • B(b);N_GUARD::QAB(G)
      • Refutation
        • P(f);
    • Try
      • Q(G);N_PINP(h)
      • Threat
        • QAB1(G)
      • Refutation
        • B(c);XS(B)
    • Try
      • Q(G);N_PINP(h)
      • Threat
        • QAB1(G)
      • Refutation
        • B(c);XS(B)
    • Try
      • Q(G);N_PINP(h),XP(j)
      • Threat
        • DUALS(4)
      • Vars
        • P(f);::QAB1(G)
      • Refutation
        • B(c);XS(B)
    • Try
      • Q(G);N_PINP(h)
      • Threat
        • QAR1(G)
      • Vars
        • B(c);P_PINB(E),S_CUTP(j)::QAB(G)
        • S(a);N_GUARD::R(A),XB(b)
        • P(j);S_CUTB(c)::QAR(G)
      • Refutation
        • B(c);XS(B)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(e);S_FLIGHT,XS(B)::QAB(G),XP(h)
      • B(b);N_GUARD,SBLOCK,XS(B)::QAB(G)
      • S(a);N_GUARD,SBLOCK,XS(B)::R(A),XB(b)
      • P(g);OGATE,SBLOCK,XS(B)::B(C)
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