MESON Chess Problem Database

Problem Display
PID: 251124 (KnBB2b1/2N2pr1/p2k1p2/3Pp1p1/1P6/7Q/2P2P1b/3r2n1 w - - 0 1)

Dyachuk, Vasyl Vasilovich

Kopyl, Valery Volodimirovich

Melnikov, Volodimir Grigorovich

Uralski Problemist, 2012

KnBB2b1/2N2pr1/p2k1p2/3Pp1p1/1P6/7Q/2P2P1b/3r2n1

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qd7#
    • 1...Sd7
      • 2.Qxd7#
    • 1...e4
      • 2.Qxh2#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Se8#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...e4
        • 2.Qxh2#
      • 1...Sf3!
    • 1.Qf5?
      • threat
        • 2.Qxf6#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Rg6!
    • 1.Qb3?
      • threat
        • 2.Se8#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...e4!
    • 1.Qf3?
      • threat
        • 2.Se8#
        • 2.Qxf6#
      • 1...Rxd5
        • 2.Qxd5#
        • 2.Qxf6#
      • 1...e4
        • 2.Qxf6#
      • 1...Rg6
        • 2.Se8#
      • 1...Bf4
        • 2.Se8#
      • 1...Sd7
        • 2.Se8#
      • 1...f5
        • 2.Se8#
      • 1...Sxf3!
    • 1.Qh6?
      • threat
        • 2.Qxf6#
      • 1...Rg6
        • 2.Qf8#
      • 1...Sd7!
    • 1.c4?
      • threat
        • 2.Se8#
        • 2.c5#
      • 1...e4
        • 2.Qxh2#
      • 1...Rc1
        • 2.Se8#
      • 1...Sd7
        • 2.Se8#
        • 2.Qxd7#
      • 1...Rxd5!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qc5#
      • 1...Rxd5
        • 2.Se8#
      • 1...Sd7
        • 2.Qc6#
      • 1...e4
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(k);N_GUARD::QAR1(C)
    • S(k);N_GUARD::QAR1(C),XS(k)
    • P(d);OGATEB::QAB(C),XB(c)
  • Tries
    • Try
      • Q(C);
      • Threat
        • S(F)
      • Vars
        • R(a);OGATE,XP(E)::QAR1(C),XR(a)
        • P(d);OGATEB::QAB(C),XB(c)
      • Refutation
        • S(b);
    • Try
      • Q(C);
      • Threat
        • QAR2(C),XP(h)
      • Vars
        • S(k);N_GUARD::QAR1(C),XS(k)
      • Refutation
        • R(j);
    • Try
      • Q(C);
      • Threat
        • S(F)
      • Vars
        • R(a);OGATE,XP(E)::QAR1(C),XR(a)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);::QAR2(C),XP(h)
        • R(j);::S(F)
        • B(c);::S(F)
        • S(k);::S(F)
        • P(h);::S(F)
      • Refutation
        • S(b);XQ(C)
    • Try
      • Q(C);P_PINP(h)
      • Threat
        • QAR2(C),XP(h)
      • Vars
        • R(j);N_SPINP(h),OGATE::QAB(C)
      • Refutation
        • S(k);
    • Try
      • P(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(d);OGATEB::QAB(C),XB(c)
        • R(a);::S(F)
      • Refutation
        • R(a);XP(E)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • R(a);SBLOCK,XP(E)::S(F)
      • S(k);N_GUARD::QAR1(C)
      • P(d);OGATE::QAR2(C),XP(h)
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