MESON Chess Problem Database

Problem Display
PID: 141335 (4Q3/8/4N3/B3p3/8/3n1nK1/1N2kP2/7R w - - 0 1)

Chepizhni, Viktor Ivanovich

L'Italia Scacchistica, 1961

4Q3/8/4N3/B3p3/8/3n1nK1/1N2kP2/7R

#2

7 + 4

6167 Viktor Chepizhny 2007
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sf4#
    • 1...Sde1
      • 2.Sf4#
    • 1...Sxb2
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sc5
      • 2.Sf4#
    • 1...Sfe1
      • 2.Sd4#
    • 1...Sd2
      • 2.Sd4#
    • 1...Sh2
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
    • 1...Sh4
      • 2.Sd4#
    • 1...Sg5
      • 2.Sd4#
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qd1#
        • 2.Qe4#
      • 1...Sxb2
        • 2.Qe4#
      • 1...Sb4
        • 2.Qd1#
      • 1...Sg1
        • 2.Qd1#
      • 1...Sc5
        • 2.Qd1#
      • 1...Sd2
        • 2.Qd1#
      • 1...Sd4
        • 2.Qd1#
      • 1...Sg5
        • 2.Qd1#
        • 2.Qc2#
      • 1...e4
        • 2.Qd1#
        • 2.Qxe4#
      • 1...Sxf2!
    • 1.Qh5?
      • threat
        • 2.Qxf3#
      • 1...Se1
        • 2.Rxe1#
      • 1...e4
        • 2.Sd4#
      • 1...Sb4!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxd3#
      • 1...Se1
        • 2.Rxe1#
      • 1...e4
        • 2.Sf4#

This anticipates 99698(1974)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • S(b);N_GUARD::S(F)
    • S(b);N_GUARD,XS(B)::S(F)
    • S(b);N_GUARD::S(F),XS(b)
    • S(c);N_GUARD::S(F)
    • S(c);N_GUARD::S(F),XS(c)
  • Tries
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XS(B)::QAR2(G)
        • S(b);::QAB1(G)
        • S(c);::QAB1(G)
      • Refutation
        • S(b);XP(C)
    • Try
      • Q(G);P_PINS(c)
      • Threat
        • QAB1(G),XS(c)
      • Vars
        • S(b);N_GUARD::R1(A),XS(b)
        • P(d);N_GUARD::S(F)
      • Refutation
        • S(b);
  • Actual
    • Q(G);P_PINS(b)
    • Threat
      • QAB1(G),XS(b)
    • Vars
      • S(c);N_GUARD::R1(A),XS(c)
      • P(d);N_GUARD::S(F)
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