MESON Chess Problem Database

Problem Display
PID: 235487 (2B1nr2/6p1/1pk1Nnb1/PpP2pRr/8/N2Q3p/R2b3B/1K6 w - - 0 1)

Neptaev, Nikolai I

Zadachi i Etyudi, 2001

2B1nr2/6p1/1pk1Nnb1/PpP2pRr/8/N2Q3p/R2b3B/1K6

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Se4
      • 2.Qd7#
    • 1...Sg4
      • 2.Qf3#
      • 2.Qd7#
    • 1...Sd5
      • 2.Qxb5#
    • 1...Sd7
      • 2.Qf3#
      • 2.Qxd7#
    • 1...Sh7
      • 2.Qf3#
      • 2.Qd7#
    • 1...Sg8
      • 2.Qf3#
      • 2.Qd7#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sc7
      • 2.Qd6#
    • 1...bxc5
      • 2.Sd8#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Sd8#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Sc7!
    • 1.Bd7+?
      • 1...Sxd7
        • 2.Qf3#
      • 1...Kb7!
    • 1.Rc2?
      • threat
        • 2.Sd8#
      • 1...Bf4
        • 2.cxb6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc7
        • 2.Qd6#
      • 1...f4
        • 2.Qxb5#
      • 1...Bc3!
    • 1.Rxd2?
      • threat
        • 2.Qxb5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc7
        • 2.Qd6#
      • 1...b4
        • 2.Qb5#
      • 1...f4!
  • Keys
    • 1.cxb6!
      • threat
        • 2.Qxb5#
      • 1...Bf4
        • 2.Rc2#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sc7
        • 2.Qd6#
      • 1...b4
        • 2.Qc4#
        • 2.Qb5#
      • 1...f4
        • 2.Sd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(h);N_GUARD::QAB1(E)
    • S(h);SBLOCK::QAB1(E),XP(c)
    • S(k);N_GUARD::QAR1(E),XS(k)
    • S(k);N_GUARD::QAR1(E)
    • P(f);SBLOCK,XP(G)::S(I)
  • Tries
    • Try
      • B(C);
      • Threat
        • S(I)
      • Vars
        • S(k);OGATE,XB(C)::QAR1(E),XS(k)
      • Refutation
        • S(k);
    • Try
      • B(J);CHECK
      • Vars
        • S(h);SBLOCK,XB(J)::QAB(E)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • R(B);
      • Threat
        • S(I)
      • Vars
        • B(a);N_GUARD::R(B)+P(G),XP(f)
        • S(k);N_GUARD::QAR1(E),XS(k)
        • S(k);N_GUARD::QAR1(E)
        • P(d);::QAB1(E),XP(c)
      • Refutation
        • B(a);
    • Try
      • R(B);XB(a)
      • Threat
        • QAB1(E),XP(c)
      • Vars
        • S(k);N_GUARD::QAR1(E),XS(k)
        • S(k);N_GUARD::QAR1(E)
        • P(c);::QAB1(E)
      • Refutation
        • P(d);P_PINQ(E)
  • Actual
    • P(G);XP(f)
    • Threat
      • QAB1(E),XP(c)
    • Vars
      • B(a);N_GUARD::R(B)
      • S(k);N_GUARD::QAR1(E),XS(k)
      • S(k);N_GUARD::QAR1(E)
      • P(d);P_PINQ(E)::S(I)
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