MESON Chess Problem Database

Problem Display
PID: 18562 (8/3p4/2pK4/kNQ5/8/8/2P5/8 w - - 0 1)

Kopaev, Viacheslav Georgievich

3rd Prize, Shakhmaty v SSSR, 1956

8/3p4/2pK4/kNQ5/8/8/2P5/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
56 The Problemist 2004
5454 Near Snap 2010
136 Problem Observer 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Sc3#
  • Tries
    • 1.c3?
      • 1...Ka4
        • 2.Qb4#
      • 1...cxb5
        • 2.Qa7#
      • 1...Ka6!
  • Keys
    • 1.c4!
      • 1...Ka4
        • 2.Qa3#
      • 1...Ka6
        • 2.Qa7#
      • 1...cxb5
        • 2.Qxb5#

This anticipates 110147(1987), 77517(1996)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::S(B)
  • Tries
    • Try
      • P(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • P(b);P_SPINP(b),SBLOCK,XS(B)::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • P(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • P(b);OGATE,P_SPINP(b),XS(B)::QAR1(C),XP(b)
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