MESON Chess Problem Database

Problem Display
PID: 155079 (2K5/2p1pppP/1pN2kP1/3nR1p1/6P1/Qp6/6p1/nB2R3 w - - 0 1)

Storozhenko, Ivan Ivanovich

2nd Prize, Loshinski/Umnov-100 JT, 2012

2K5/2p1pppP/1pN2kP1/3nR1p1/6P1/Qp6/6p1/nB2R3

#2

9 + 11

23 Die Schwalbe 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Qxe7#
    • 1...Se3
      • 2.Qxe7#
    • 1...Sf4
      • 2.Qxe7#
  • Tries
    • 1.Rxd5?
      • threat
        • 2.Qxe7#
      • 1...e5
        • 2.Qe7#
      • 1...e6
        • 2.Qe7#
      • 1...Sc2!
    • 1.Rxe7?
      • threat
        • 2.Rxf7#
      • 1...Sxe7+
        • 2.Qxe7#
      • 1...fxg6
        • 2.R1e6#
      • 1...Se3
        • 2.Qb2#
      • 1...Sc2!
    • 1.h8S?
      • threat
        • 2.Rf5#
      • 1...fxg6
        • 2.Re6#
      • 1...Se3
        • 2.Qxe7#
      • 1...e6!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Re6#
      • 1...fxg6
        • 2.Rf5#
      • 1...Sc3
        • 2.Qf2#
      • 1...Se3
        • 2.Rxe7#
      • 1...e6
        • 2.Rxe6#

This is a version of 7164

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(d);N_GUARD::QAB1(C),XP(i)
  • Tries
    • Try
      • R(E);XS(d)
      • Threat
        • QAB1(C),XP(i)
      • Vars
        • P(i);::QAB1(C)
      • Refutation
        • S(a);
    • Try
      • R(E);XP(i)
      • Threat
        • R1(E),XP(j)
      • Vars
        • S(d);CHECK,OGATE,XR(E)::QAB1(C),XS(d)
        • P(j);N_GUARD,XP(G)::R1(B)
        • S(d);N_GUARD::QAB(C)
      • Refutation
        • S(a);
    • Try
      • P(H);
      • Threat
        • R1(E)
      • Vars
        • P(j);N_GUARD,XP(G)::R1(E)
        • S(d);N_GUARD::QAB1(C),XP(i)
      • Refutation
        • P(i);
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+R(E),DCHECK
    • Vars
      • P(j);SBLOCK,XP(G)::QAB(C)+R(E),DCHECK
      • S(d);N_GUARD::QAR(C)
      • S(d);N_GUARD::QAB(C)+R(E),XP(i)
      • P(i);::QAB(C)+R(E),DCHECK,XP(i)
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