MESON Chess Problem Database

Problem Display
PID: 919 (1nK5/5N1p/1pk4r/1p1q4/6Q1/1N5p/6B1/2r3nR w - - 0 1)

Aleksandrovich, Aleksandr

The Problemist Supplement, 1993

1nK5/5N1p/1pk4r/1p1q4/6Q1/1N5p/6B1/2r3nR

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Bxe4#
      • 2.Qxe4#
    • 1...Rc5
      • 2.Sd4#
    • 1...Rh4
      • 2.Qe6#
    • 1...Rh5
      • 2.Qe6#
    • 1...Rd6
      • 2.Se5#
    • 1...Re6
      • 2.Qxe6#
    • 1...Sa6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qxd5#
      • 1...Qxe4
        • 2.Bxe4#
      • 1...hxg2
        • 2.Rxh6#
      • 1...Rd1
        • 2.Qc2#
      • 1...Rc5
        • 2.Sd4#
      • 1...Rh5
        • 2.Qe6#
      • 1...Rd6
        • 2.Se5#
      • 1...Sf3
        • 2.Rxc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(a);SBLOCK::S(C)
    • R(h);N_GUARD::QAR2(D)
    • R(h);SBLOCK::S(E)
    • R(h);N_GUARD::QAR2(D),XR(h)
    • S(j);N_GUARD::QAB1(D)
    • S(j);N_GUARD::QAB1(D),XS(j)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D),XQ(e)
    • Vars
      • Q(e);OGATE,XQ(D)::B(B),XQ(e)
      • P(c);OGATE,XB(B)::R(A),XR(h)
      • R(a);N_GUARD::QAR(D)
      • R(a);SBLOCK::S(C)
      • R(h);N_GUARD::QAR2(D)
      • R(h);SBLOCK::S(E)
      • S(b);OGATE::R(A),XR(a)
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