MESON Chess Problem Database

Problem Display
PID: 179658 (6Q1/3bKN2/1p3p2/2ppp3/nB1kP2R/8/2RP4/2r1N2q w - - 0 1)

Dedeshin, Viktor

Kopnin, Aleksey Grigorevich

2nd Comm., Bryanski Rabochi, 1972

6Q1/3bKN2/1p3p2/2ppp3/nB1kP2R/8/2RP4/2r1N2q

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qg1#
    • 1...Qg1
      • 2.Qxg1#
  • Tries
    • 1.Sxe5?
      • threat
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qxd5#
      • 1...Qxe4
        • 2.Sf3#
      • 1...Bc6
        • 2.Sxc6#
      • 1...Be6
        • 2.Sc6#
      • 1...Sc3
        • 2.Bxc3#
      • 1...dxe4!
    • 1.Sg5?
      • threat
        • 2.Qxd5#
      • 1...Qxe4
        • 2.Sgf3#
      • 1...dxe4
        • 2.Qc4#
      • 1...Bc6
        • 2.Se6#
      • 1...Be6
        • 2.Sxe6#
      • 1...Sc3!
    • 1.Sd8?
      • threat
        • 2.Qxd5#
      • 1...Qxe4
        • 2.Qg1#
      • 1...dxe4
        • 2.Qc4#
      • 1...Bc6
        • 2.Sxc6#
        • 2.Se6#
      • 1...Be6
        • 2.Sc6#
        • 2.Sxe6#
      • 1...Sc3!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qxd5#
      • 1...Qxe4
        • 2.Qg1#
      • 1...dxe4
        • 2.Qc4#
      • 1...Bc6
        • 2.Sf5#
      • 1...Be6
        • 2.Sb5#
      • 1...Sc3
        • 2.Bxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(I)
    • Q(b);N_GUARD::QAB(I),XQ(b)
  • Tries
    • Try
      • S(H);XP(g)
      • Threat
        • QAR1(I),XP(f)
      • Vars
        • K(d);S_FLIGHT,XS(H)::QAR1(I),XP(f)
        • Q(b);N_GUARD,P_PINS(H),P_SPINQ(b),XP(E)::S(A)
        • B(j);N_GUARD::S(H),XB(j)
        • B(j);N_GUARD::S(H)
        • S(c);N_GUARD::B(D),XS(c)
      • Refutation
        • P(f);P_SPINP(f),XP(E)
    • Try
      • S(H);
      • Threat
        • QAR1(I),XP(f)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XP(E)::S(H)
        • P(f);OGATE,P_SPINP(f),XP(E)::QAR1(I)
        • B(j);N_GUARD::S(H)
        • B(j);N_GUARD::S(H),XB(j)
      • Refutation
        • S(c);
    • Try
      • S(H);
      • Threat
        • QAR1(I),XP(f)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(I)
        • P(f);OGATE,P_SPINP(f),XP(E)::QAR1(I)
      • Refutation
        • S(c);
  • Actual
    • S(H);
    • Threat
      • QAR1(I),XP(f)
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b),XP(E)::QAB(I)
      • P(f);OGATE,P_SPINP(f),XP(E)::QAR1(I)
      • B(j);N_GUARD::S(H)
      • S(c);N_GUARD::B(D),XS(c)
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