MESON Chess Problem Database

Problem Display
PID: 87790 (Q7/3pp3/3NpRp1/1p1Nk1p1/4P1K1/2R1B3/8/8 w - - 0 1)

Shanshin, Valery Yurevich

Uralski Problemist, 1994

Q7/3pp3/3NpRp1/1p1Nk1p1/4P1K1/2R1B3/8/8

#2

8 + 7

15345 Wola Gulowska Award 1997
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qb8#
  • Tries
    • 1.Sb4?
      • 1...Kxd6
        • 2.Qd5#
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exf6
        • 2.Sf7#
      • 1...exd6!
    • 1.Sb6?
      • 1...Kxd6
        • 2.Qd5#
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qh8#
      • 1...exd6
        • 2.Sxd7#
      • 1...exf6
        • 2.Sf7#
      • 1...b4!
    • 1.Bd4+?
      • 1...Kxd6
        • 2.Qa6#
        • 2.Qb8#
        • 2.e5#
      • 1...Kxd4!
    • 1.Bf4+?
      • 1...Kd4
        • 2.Qa7#
      • 1...gxf4!
    • 1.Rc4?
      • threat
        • 2.Sf7#
      • 1...Kxd6
        • 2.Qb8#
      • 1...exd5
        • 2.Bd4#
      • 1...exd6
        • 2.Qa1#
      • 1...bxc4!
    • 1.Rf4?
      • threat
        • 2.Sf7#
      • 1...Kxd6
        • 2.Qb8#
      • 1...exd5
        • 2.Qxd5#
      • 1...exd6
        • 2.Qh8#
      • 1...gxf4!
    • 1.Qa1?
      • threat
        • 2.Rc6#
      • 1...exd5
        • 2.Rc5#
      • 1...exd6
        • 2.Rc4#
      • 1...Kxd6!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qh2#
      • 1...Kxd6
        • 2.Qh2#
        • 2.Qb8#
      • 1...exd5
        • 2.Rxg6#
      • 1...exd6
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);OGATEB,P_SPINP(d),S_FLIGHT,XS(F)::QAB(H)
  • Tries
    • Try
      • S(E);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(G)::QAB(H)
        • P(g);SBLOCK,XR(G)::S(F)
      • Refutation
        • P(g);XS(F)
    • Try
      • S(E);
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(G)::QAB(H)
        • P(g);SBLOCK,XS(F)::S(E),XP(f)
        • P(g);SBLOCK,XR(G)::S(F)
      • Refutation
        • P(a);
    • Try
      • B(B);CHECK
      • Refutation
        • K(b);S_FLIGHT,XB(B)
    • Try
      • B(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(H)
      • Refutation
        • P(c);XB(B)
    • Try
      • R(A);
      • Threat
        • S(F)
      • Vars
        • K(b);OGATEB,P_SPINP(d),S_FLIGHT,XS(F)::QAB(H)
        • P(d);XS(E)::B(B)
        • P(g);SBLOCK,XS(F)::QAB(H)
      • Refutation
        • P(a);XR(A)
    • Try
      • R(G);
      • Threat
        • S(F)
      • Vars
        • K(b);OGATEB,S_FLIGHT,XS(F)::QAB(H)
        • P(d);OGATE,XS(E)::QAR1(H),XP(d)
        • P(g);SBLOCK,XS(F)::QAB(H)
      • Refutation
        • P(c);XR(G)
    • Try
      • Q(H);
      • Threat
        • QAB(H)+R(A)
      • Vars
        • P(d);XS(E)::QAB(H)+R(A)
        • P(g);SBLOCK,XS(F)::QAB(H)+R(A)
      • Refutation
        • K(b);P_SPINP(d),S_FLIGHT,XS(F)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)
    • Vars
      • P(d);XS(E)::QAB(H)+R(G),XP(e)
      • P(g);SBLOCK,XS(F)::QAB(H)+R(G)
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