MESON Chess Problem Database

Problem Display
PID: 177807 (3NK1B1/3p4/3k4/p2NpP2/2R1p1p1/1r5r/7Q/7b w - - 0 1)

Pushkin, Sergey

Sahs (Latvia), 1984

3NK1B1/3p4/3k4/p2NpP2/2R1p1p1/1r5r/7Q/7b

#2

7 + 9

6490 yacpdb 2018
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Sb7#
    • 1...Rbc3
      • 2.Sb7#
    • 1...Rbd3
      • 2.Sb7#
    • 1...Rbe3
      • 2.Sb7#
    • 1...Rbf3
      • 2.Sb7#
    • 1...Rbg3
      • 2.Sb7#
    • 1...Rb7
      • 2.Sxb7#
    • 1...Rhc3
      • 2.Qh6#
    • 1...Rhd3
      • 2.Qh6#
    • 1...Rhe3
      • 2.Qh6#
    • 1...Rhf3
      • 2.Qh6#
    • 1...Rhg3
      • 2.Qh6#
    • 1...Rh6
      • 2.Qxh6#
  • Tries
    • 1.Sc3?
      • threat
        • 2.Sf7#
      • 1...Rbxc3
        • 2.Sb7#
      • 1...Rhxc3
        • 2.Qh6#
      • 1...Rh7
        • 2.Qd2#
      • 1...Rb8!
    • 1.Se3?
      • threat
        • 2.Sf7#
      • 1...Rbxe3
        • 2.Sb7#
      • 1...Rhxe3
        • 2.Qh6#
      • 1...Rb8
        • 2.Qd2#
      • 1...Rh7!
    • 1.Sb4?
      • threat
        • 2.Sb7#
        • 2.Sf7#
      • 1...axb4
        • 2.Sb7#
      • 1...Rh7
        • 2.Sb7#
      • 1...e3
        • 2.Sf7#
      • 1...Rxb4!
    • 1.Sb6?
      • threat
        • 2.Sc8#
        • 2.Sb7#
        • 2.Sf7#
      • 1...Rh7
        • 2.Sc8#
        • 2.Sb7#
      • 1...e3
        • 2.Sc8#
        • 2.Sf7#
      • 1...Rxb6!
    • 1.Se7?
      • threat
        • 2.Sc8#
        • 2.Sf7#
      • 1...Rh7
        • 2.Sc8#
      • 1...Rb8!
    • 1.Qxh3?
      • threat
        • 2.Qh6#
      • 1...Rxh3
        • 2.Sb7#
      • 1...gxh3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Sf7#
      • 1...Rb8
        • 2.Se3#
      • 1...Rbd3
        • 2.Sb7#
      • 1...Rhd3
        • 2.Qh6#
      • 1...Rh7
        • 2.Sc3#

This anticipates 156310(2005-2006)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • R(b);N_GUARD::S(E)
    • R(b);N_GUARD,N_SPINP(g)::S(E)
    • R(b);N_GUARD::S(E),XR(b)
    • R(c);OGATE::QAR(A)
    • R(c);N_SPINP(g),OGATE::QAR(A)
    • R(c);OGATE::QAR(A),XR(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(E)
      • Vars
        • R(b);N_GUARD,XS(C)::S(E)
        • R(c);OGATE,XS(C)::QAR(A)
        • R(c);N_GUARD::QAR(A)
      • Refutation
        • R(b);P_PINS(E)
    • Try
      • S(C);
      • Threat
        • S(E)
      • Vars
        • R(b);N_GUARD,XS(C)::S(E)
        • R(c);OGATE,XS(C)::QAR(A)
        • R(b);N_GUARD,P_PINS(E)::QAR(A)
      • Refutation
        • R(c);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XS(C)::S(E)
        • R(c);::S(E)
        • P(d);::S(E)
      • Refutation
        • R(b);XS(C)
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Refutation
        • R(b);XS(C)
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);::S(C)
      • Refutation
        • R(b);P_PINS(E)
    • Try
      • Q(A);N_PINP(g),XR(c)
      • Threat
        • QAR(A)
      • Vars
        • R(b);N_GUARD,XQ(A)::S(E)
      • Refutation
        • P(e);XQ(A)
  • Actual
    • Q(A);N_PINP(g)
    • Threat
      • S(E)
    • Vars
      • R(b);N_GUARD,P_PINS(E)::QAR(A)+S(C)
      • R(b);N_GUARD::S(E)
      • R(c);N_GUARD::QAR(A)
      • R(c);N_GUARD::QAR(A)+S(C)
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