MESON Chess Problem Database

Problem Display
PID: 140334 (3n4/2N3p1/pK1B4/3pR2r/3k2p1/1R1P4/3N4/8 w - - 0 1)

Kozlov, Aleksandr Ivanovich

Shakhmaty v SSSR, 1949

3n4/2N3p1/pK1B4/3pR2r/3k2p1/1R1P4/3N4/8

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Bc5#
    • 1...Sc6
      • 2.Se6#
    • 1...Se6
      • 2.Sxe6#
    • 1...Sb7
      • 2.Se6#
    • 1...Sf7
      • 2.Se6#
    • 1...g3
      • 2.Sf3#
    • 1...a5
      • 2.Sb5#
  • Tries
    • 1.Re1?
      • threat
        • 2.Bc5#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sb7
        • 2.Se6#
      • 1...Rh6!
    • 1.Re2?
      • threat
        • 2.Bc5#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sb7
        • 2.Se6#
      • 1...Rh6!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Bc5#
      • 1...dxc4
        • 2.Re4#
      • 1...Rh6
        • 2.Rxd5#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sb7
        • 2.Se6#

This is a version of 26658

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(d);SBLOCK,XR(D)::B(F)
    • S(g);N_GUARD::S(G)
    • S(g);N_GUARD::S(G),XS(g)
    • P(b);N_GUARD::S(A)
    • P(e);N_GUARD::S(G)
  • Tries
    • Try
      • R(D);
      • Threat
        • B(F)
      • Vars
        • S(g);N_GUARD::S(G),XS(g)
        • S(g);N_GUARD::S(G)
      • Refutation
        • R(d);P_PINB(F)
    • Try
      • R(D);
      • Threat
        • B(F)
      • Vars
        • S(g);N_GUARD::S(G),XS(g)
        • S(g);N_GUARD::S(G)
      • Refutation
        • R(d);P_PINB(F)
  • Actual
    • S(A);
    • Threat
      • B(F)
    • Vars
      • P(c);N_GUARD,XS(A)::R1(D)
      • R(d);N_GUARD,P_PINB(F)::R1(D),XP(c)
      • S(g);N_GUARD::S(G),XS(g)
      • S(g);N_GUARD::S(G)
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