MESON Chess Problem Database

Problem Display
PID: 27638 (1b4B1/3pp3/rQn5/1R1r1kBK/6Np/2n2P2/2N2q2/7b w - - 0 1)

Dombrovskis, Alfreds A

3rd HM., Tijdschrift vd KNSB, 1959

1b4B1/3pp3/rQn5/1R1r1kBK/6Np/2n2P2/2N2q2/7b

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Scxe3#
    • 1...Qg3
      • 2.Sce3#
    • 1...Qf1
      • 2.Sce3#
    • 1...Qg2
      • 2.Sce3#
    • 1...Qh2
      • 2.Sce3#
    • 1...Re5
      • 2.Sh6#
    • 1...Be5
      • 2.Sh6#
    • 1...Sb4
      • 2.Bh7#
    • 1...Sd4
      • 2.Bh7#
    • 1...Sa5
      • 2.Bh7#
    • 1...Se5
      • 2.Sh6#
    • 1...Sa7
      • 2.Bh7#
    • 1...Sd8
      • 2.Bh7#
    • 1...e5
      • 2.Sh6#
    • 1...e6
      • 2.Bh7#
  • Tries
    • 1.Sd4+?
      • 1...Sxd4
        • 2.Bh7#
      • 1...Qxd4!
    • 1.Rxd5+?
      • 1...Be5
        • 2.Sh6#
      • 1...Se5
        • 2.Sh6#
        • 2.Bh7#
      • 1...e5
        • 2.Sh6#
      • 1...Sxd5!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Sh6#
        • 2.Bh7#
      • 1...Qxe3
        • 2.Scxe3#
      • 1...Qxf3
        • 2.Bh7#
      • 1...Bxf3
        • 2.Bh7#
      • 1...Re5
        • 2.Sh6#
        • 2.Qf4#
      • 1...Be5
        • 2.Sh6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sb4
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Sa5
        • 2.Sd4#
      • 1...Se5
        • 2.Qf4#
      • 1...Sa7
        • 2.Sd4#
      • 1...Sd8
        • 2.Sd4#
      • 1...e5
        • 2.Sh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::S(A),XQ(b)
    • Q(b);N_GUARD::S(A)
    • R(e);::S(C)
    • B(k);N_SPINR(e),SBLOCK::S(C)
    • S(h);::B(H)
    • S(h);N_SPINR(e),SBLOCK::S(C)
    • P(j);N_SPINR(e),SBLOCK::S(C)
    • P(j);SBLOCK::B(H)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • S(h);XS(A)::B(H)
      • Refutation
        • Q(b);XS(A)
    • Try
      • R(D);CHECK,XR(e)
      • Vars
        • B(k);P_SPINB(k)::S(C)
        • P(j);P_SPINP(j)::S(C)
      • Refutation
        • S(c);XR(D)
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • Q(b);XQ(G)::S(A),XQ(b)
      • Q(b);P_PINS(C),XP(B)::B(H)
      • B(a);P_PINS(C),XP(B)::B(H)
      • B(k);N_SPINR(e)::S(C)
      • S(c);N_GUARD::QAB1(G),XS(c)
      • S(h);N_GUARD::S(A)
      • S(h);N_GUARD::S(A),XS(h)
      • S(h);N_SPINR(e),S_CUTB(k)::QAR1(G)
      • P(j);N_SPINR(e)::S(C)
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