MESON Chess Problem Database

Problem Display
PID: 117025 (7K/8/7n/2p1N2P/5k1P/6N1/QB1nbP2/8 w - - 0 1)

Kopaev, Viacheslav Georgievich

C Moscovite, 1992

7K/8/7n/2p1N2P/5k1P/6N1/QB1nbP2/8

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7+
      • 2.Qxf7#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qxd2#
      • 1...Sf7+
        • 2.Qxf7#
      • 1...Sb1
        • 2.Qe4#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sb3
        • 2.Qe4#
      • 1...Sf3
        • 2.Qe4#
      • 1...Sc4
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sg4
        • 2.Sg6#
      • 1...Sf5
        • 2.Sxe2#
      • 1...Bd3!
    • 1.Qf7+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sxf7+!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxh6#
      • 1...Sf7+
        • 2.Qxf7#
      • 1...Sf3
        • 2.Sg6#
      • 1...Se4
        • 2.Sxe2#
      • 1...Sg4
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sg8
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);CHECK,N_GUARD::QAR(A),XS(e)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A),XS(a)
      • Vars
        • S(e);CHECK,N_GUARD::QAR(A),XS(e)
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
        • S(e);SBLOCK::S(F)
        • S(e);SBLOCK::S(D),XB(b)
      • Refutation
        • B(b);
    • Try
      • Q(A);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAR1(A),XS(e)
      • Refutation
        • S(e);CHECK,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A),XS(e)
    • Vars
      • S(e);CHECK,N_GUARD::QAR(A),XS(e)
      • S(a);SBLOCK::S(F)
      • S(a);SBLOCK::S(D),XB(b)
      • S(e);N_GUARD::QAR1(A)
      • S(e);N_GUARD::QAR1(A),XS(e)
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