MESON Chess Problem Database

Problem Display
PID: 10077 (1nKn4/B1p5/prp5/Nb1kP3/3P1pQ1/4P3/2PN4/1q6 w - - 0 1)

Popov, Grigory Leontievich

Themes-64, 1961

1nKn4/B1p5/prp5/Nb1kP3/3P1pQ1/4P3/2PN4/1q6

#2

9 + 10

3749 FIDE Album (1959-1961) 1966
5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.e4#
    • 1...Ba4
      • 2.c4#
    • 1...Sd7
      • 2.Qxd7#
    • 1...Se6
      • 2.Qf3#
    • 1...Sb7
      • 2.Qg8#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sc3#
        • 2.Sf6#
      • 1...Qxc2
        • 2.Sf6#
      • 1...Qa1
        • 2.Sf6#
      • 1...Qe1
        • 2.Sf6#
      • 1...Qb2
        • 2.Sf6#
      • 1...Qb3
        • 2.Sf6#
      • 1...Qb4
        • 2.Sf6#
      • 1...Sd7
        • 2.Sc3#
      • 1...c5
        • 2.Sc3#
      • 1...Kxe4!
    • 1.Qg8+?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Se6!
  • Keys
    • 1.Sxc6!
      • threat
        • 2.Se7#
      • 1...Kxc6
        • 2.Qf3#
      • 1...Rxc6
        • 2.e4#
      • 1...Bxc6
        • 2.c4#
      • 1...Sbxc6
        • 2.Qd7#
      • 1...Sdxc6
        • 2.Qg8#
      • 1...Qb4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • R(f);::P(C)
    • B(c);N_GUARD::P(A)
    • S(i);N_GUARD::QAR2(E),XS(i)
    • S(j);SBLOCK::QAB(E)
    • S(j);N_GUARD::QAB(E)
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XP(A)::S(B)
        • Q(a);::S(B)
        • S(i);::S(B)
        • P(g);::S(B)
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT,XS(B)
    • Try
      • Q(E);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAB(E),XS(j)
      • Refutation
        • S(j);P_SPINS(j)
  • Actual
    • S(F);XP(g)
    • Threat
      • S(F)
    • Vars
      • K(d);S_FLIGHT,XS(F)::QAB(E)
      • R(f);SBLOCK,XS(F)::P(C)
      • B(c);N_GUARD,SBLOCK,XS(F)::P(A)
      • S(i);N_GUARD,XS(F)::QAR2(E)
      • S(j);N_GUARD,SBLOCK,XS(F)::QAB(E)
      • Q(a);N_GUARD::S(F),XQ(a)
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