MESON Chess Problem Database

Problem Display
PID: 139941 (2q2r2/5n2/2p3Q1/2Pk1p2/R2P3R/n2N1N2/2p5/2K4b w - - 0 1)

Chepizhni, Viktor Ivanovich

2nd Prize, Shakhmatnaya kompozitsiya, 2004

2q2r2/5n2/2p3Q1/2Pk1p2/R2P3R/n2N1N2/2p5/2K4b

#2

8 + 9

6167 Viktor Chepizhny 2007
23 Die Schwalbe 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Sb4#
    • 1...Se5
      • 2.Qd6#
    • 1...Sg5
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sh6
      • 2.Qd6#
    • 1...Sd8
      • 2.Qd6#
    • 1...Sh8
      • 2.Qd6#
    • 1...f4
      • 2.Sxf4#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sb4#
        • 2.Sf4#
      • 1...Qb7
        • 2.Sf4#
      • 1...Qc7
        • 2.Sb4#
      • 1...Be4
        • 2.Sf4#
      • 1...Sc4
        • 2.Sb4#
      • 1...f4
        • 2.Sxf4#
      • 1...Qb8!
    • 1.Sfe5?
      • threat
        • 2.Sb4#
      • 1...Sxe5
        • 2.Qd6#
      • 1...Qb8
        • 2.Qxc6#
      • 1...Be4
        • 2.Sf4#
      • 1...f4
        • 2.Sxf4#
      • 1...Qb7!
    • 1.Qxf5+?
      • 1...Se5
        • 2.Sf4#
        • 2.Qxe5#
      • 1...Qxf5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf4#
      • 1...Sxg5
        • 2.Qd6#
      • 1...Qc7
        • 2.Qe6#
      • 1...Qb8
        • 2.Qe6#
      • 1...Sc4
        • 2.Sb4#
      • 1...f4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • S(c);SBLOCK::S(B)
    • S(g);N_GUARD::QAR1(H)
    • S(g);N_GUARD::QAR1(H),XS(g)
    • P(e);::S(B),XP(e)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);::S(B)
        • B(a);::S(B)
        • S(c);::S(B)
        • P(e);::S(B),XP(e)
      • Refutation
        • Q(h);
    • Try
      • S(C);
      • Threat
        • S(B)
      • Vars
        • S(g);N_GUARD,XS(C)::QAR1(H)
        • Q(h);N_GUARD::QAB1(H),XP(f)
        • B(a);SBLOCK::S(B)
        • P(e);::S(B),XP(e)
      • Refutation
        • Q(h);
    • Try
      • Q(H);CHECK,XP(e)
      • Refutation
        • Q(h);XQ(H)
  • Actual
    • S(C);
    • Threat
      • S(B)
    • Vars
      • S(g);N_GUARD,XS(C)::QAR1(H)
      • Q(h);N_GUARD::QAB1(H)
      • S(c);SBLOCK::S(B)
      • P(e);::S(B),XP(e)
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