MESON Chess Problem Database

Problem Display
PID: 198586 (2Qn4/8/rp1pp1N1/p2k2p1/N5Rb/7r/2B5/2K2b2 w - - 0 1)

Hjelle, David

Die Schwalbe, 1974

2Qn4/8/rp1pp1N1/p2k2p1/N5Rb/7r/2B5/2K2b2

#2

6 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Sc3#
    • 1...Rh2
      • 2.Sc3#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Rd3
      • 2.Qc4#
    • 1...Ra7
      • 2.Sxb6#
    • 1...Ra8
      • 2.Sxb6#
    • 1...Bg2
      • 2.Qc4#
    • 1...Bd3
      • 2.Sc3#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Bg3
      • 2.Sc3#
    • 1...Sb7
      • 2.Qxb7#
    • 1...Sf7
      • 2.Qb7#
    • 1...e5
      • 2.Se7#
  • Tries
    • 1.Bb3+?
      • 1...Bc4
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...Rxb3!
    • 1.Bd3?
      • threat
        • 2.Sc3#
        • 2.Qc4#
      • 1...Rxd3
        • 2.Qc4#
      • 1...Bxd3
        • 2.Sc3#
      • 1...Be1
        • 2.Qc4#
      • 1...b5
        • 2.Sc3#
      • 1...Sc6!
  • Keys
    • 1.Re4!
      • threat
        • 2.Se7#
      • 1...Rd3
        • 2.Qc4#
      • 1...Bd3
        • 2.Sc3#
      • 1...Ra7
        • 2.Sxb6#
      • 1...Sc6
        • 2.Qxe6#
      • 1...g4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • R(b);N_GUARD::S(C)
    • R(b);N_GUARD,P_PINB(B)::S(C),XR(b)
    • R(b);S_CUTB(a)::QAB1(F)
    • R(g);N_GUARD::S(C),XP(h)
    • B(a);N_GUARD::QAB1(F)
    • B(a);S_CUTR(b)::S(C)
    • B(a);N_GUARD::QAB1(F),XB(a)
    • B(c);S_CUTR(b)::S(C)
    • S(k);N_GUARD::QAB(F),XS(k)
    • S(k);N_GUARD::QAB(F)
    • P(j);SBLOCK::S(E)
  • Tries
    • Try
      • B(B);CHECK
      • Refutation
        • R(b);XB(B)
    • Try
      • B(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);XB(B)::QAB1(F)
        • B(a);XB(B)::S(C)
        • B(c);::QAB1(F)
        • P(h);::S(C)
      • Refutation
        • S(k);
  • Actual
    • R(D);
    • Threat
      • S(E)
    • Vars
      • R(b);S_CUTB(a)::QAB1(F)
      • B(a);S_CUTR(b)::S(C)
      • R(g);N_GUARD::S(C),XP(h)
      • S(k);N_GUARD,SBLOCK::QAB1(F),XP(j)
      • P(f);N_GUARD::S(E)
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