MESON Chess Problem Database

Problem Display
PID: 28555 (4Nn2/8/Kpk1pNP1/2P5/P3P3/3p1p1Q/6R1/3R2BB w - - 0 1)

Dombrovskis, Alfreds A

Sp. HM., 64 Shakhmatnoe obozrenie, 1977

4Nn2/8/Kpk1pNP1/2P5/P3P3/3p1p1Q/6R1/3R2BB

#2

12 + 6

14475 Mat Plus Review 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Sxg6
      • 2.Qxe6#
    • 1...Sd7
      • 2.Qxe6#
    • 1...Sh7
      • 2.Qxe6#
    • 1...b5
      • 2.axb5#
    • 1...e5
      • 2.Qc8#
  • Tries
    • 1.Rb1?
      • threat
        • 2.Rxb6#
      • 1...bxc5
        • 2.Rb6#
      • 1...Sd7
        • 2.Qxe6#
      • 1...b5
        • 2.axb5#
      • 1...f2!
    • 1.Rc1?
      • threat
        • 2.cxb6#
      • 1...bxc5
        • 2.Rxc5#
      • 1...Sd7
        • 2.Qxe6#
      • 1...b5
        • 2.axb5#
      • 1...d2!
    • 1.Rb2?
      • threat
        • 2.Rxb6#
      • 1...bxc5
        • 2.Rb6#
      • 1...Sd7
        • 2.Qxe6#
      • 1...b5
        • 2.axb5#
      • 1...f2!
    • 1.Qh7?
      • threat
        • 2.Qb7#
        • 2.Qc7#
      • 1...f2
        • 2.Qc7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sxh7!
    • 1.e5?
      • threat
        • 2.Qxf3#
      • 1...fxg2
        • 2.Bxg2#
        • 2.Qxg2#
        • 2.Qf3#
      • 1...f2!
    • 1.cxb6?
      • threat
        • 2.Rc1#
      • 1...Sd7
        • 2.Qxe6#
      • 1...d2!
  • Keys
    • 1.Rc2!
      • 1...Sxg6
        • 2.Qxe6#
      • 1...dxc2
        • 2.Rd6#
      • 1...bxc5
        • 2.Rxc5#
      • 1...Sd7
        • 2.Qxe6#
      • 1...Sh7
        • 2.Qxe6#
      • 1...d2
        • 2.cxb6#
      • 1...f2
        • 2.e5#
      • 1...b5
        • 2.axb5#
      • 1...e5
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD,XP(K)::QAR2(E),XP(e)
    • S(f);N_GUARD::QAR2(E),XP(e)
    • P(c);OGATE::P(F),XP(c)
    • P(e);OGATE::QAR2(E)
  • Tries
    • Try
      • R(A);
      • Threat
        • R1(A),XP(c)
      • Vars
        • P(c);XP(H)::R1(A)
        • S(f);N_GUARD::QAR2(E),XP(e)
        • P(c);OGATE::P(F),XP(c)
      • Refutation
        • P(b);
    • Try
      • R(A);
      • Threat
        • R(A)+P(H),XP(c)
      • Vars
        • P(c);OGATE,P_SPINP(c),XP(H)::R1(A),XP(c)
        • S(f);N_GUARD::QAR2(E),XP(e)
        • P(c);OGATE::P(F),XP(c)
      • Refutation
        • P(a);
    • Try
      • R(D);
      • Threat
        • R1(D),XP(c)
      • Vars
        • P(c);XP(H)::R1(D)
        • S(f);N_GUARD::QAR2(E),XP(e)
        • P(c);OGATE::P(F),XP(c)
      • Refutation
        • P(b);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(E)
        • S(f);N_GUARD::QAB1(E),XS(f)
      • Refutation
        • S(f);XQ(E)
    • Try
      • P(G);
      • Threat
        • QAB(E),XP(b)
      • Refutation
        • P(b);
    • Try
      • P(H);XP(c)
      • Threat
        • R(A)
      • Vars
        • S(f);N_GUARD::QAR2(E),XP(e)
      • Refutation
        • P(a);
  • Actual
    • R(D);
    • Vars
      • S(f);N_GUARD,XP(K)::QAR2(E),XP(e)
      • P(a);OGATE,XR(D)::R1(A)
      • P(c);OGATE,P_SPINP(c),XP(H)::R1(D),XP(c)
      • S(f);N_GUARD::QAR2(E),XP(e)
      • P(a);N_GUARD::R(D)+P(H),XP(c)
      • P(b);::B(C)+P(G)
      • P(c);OGATE::P(F),XP(c)
      • P(e);OGATE::QAR2(E)
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