MESON Chess Problem Database

Problem Display
PID: 109744 (b4r2/2NR3n/8/3Nk1p1/n3P1p1/5pp1/3Q4/K3R3 w - - 0 1)

Zagoruyko, Leonid Ivanovich

October Revolution-70 JT, 1987

b4r2/2NR3n/8/3Nk1p1/n3P1p1/5pp1/3Q4/K3R3

#2

7 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qc3#
      • 2.Qxb2#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sc5
      • 2.Qc3#
      • 2.Qb2#
    • 1...Sb6
      • 2.Qc3#
      • 2.Qb2#
  • Tries
    • 1.Qb2+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sxb2!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sxg4#
      • 1...Kxe4
        • 2.Qd4#
      • 1...Kf4
        • 2.Sc4#
      • 1...Kf6
        • 2.Qd6#
      • 1...Bxe4
        • 2.Qd6#
      • 1...Rf4
        • 2.Qd4#
      • 1...Sf6
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(c);N_GUARD::QAB(C),XS(c)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(C),XS(c)
      • Refutation
        • S(c);XQ(C)
  • Actual
    • S(E);
    • Threat
      • S(E),XP(d)
    • Vars
      • K(e);P-FLIGHT,XP(D)::QAR1(C)
      • K(e);S_FLIGHT::QAB(C)+S(E)
      • K(e);S_FLIGHT::QAR2(C)
      • B(h);SBLOCK,XP(D)::QAB1(C)
      • R(i);SBLOCK::QAB1(C)
      • S(g);SBLOCK::S(E)
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