MESON Chess Problem Database

Problem Display
PID: 47857 (8/1n2P1p1/6Qp/2p2K1B/2R1RB2/1P1k1ppp/nP6/5b1q w - - 0 1)

Dyachuk, Vasyl Vasilovich

Markovtsy, Vassyl Yuriovich

Sp. Prize, Pilchenko-50 JT (Uralski Problemist), 2002

8/1n2P1p1/6Qp/2p2K1B/2R1RB2/1P1k1ppp/nP6/5b1q

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Rc3#
    • 1...Sc3
      • 2.Rxc3#
    • 1...Sb4
      • 2.Rc3#
    • 1...Sa5
      • 2.Qd6#
    • 1...Sd6+
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qd6#
      • 2.exd8Q#
      • 2.exd8R#
  • Tries
    • 1.Kg4?
      • threat
        • 2.Re1#
        • 2.Re5#
        • 2.Re6#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Be2
        • 2.Red4#
        • 2.Re5#
        • 2.Re6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...f2!
    • 1.Ke6?
      • threat
        • 2.Re1#
        • 2.Re5#
      • 1...Sd8+
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Be2
        • 2.Red4#
        • 2.Re5#
      • 1...f2
        • 2.Red4#
      • 1...Sd6!
    • 1.Rxc5?
      • threat
        • 2.Qa6#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Sb4
        • 2.Rc3#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sxc5!
    • 1.Re1?
      • threat
        • 2.Kg4#
        • 2.Ke5#
        • 2.Ke6#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Sd8
        • 2.Kg4#
        • 2.Ke5#
        • 2.Qd6#
        • 2.exd8Q#
        • 2.exd8R#
      • 1...f2
        • 2.Rd1#
      • 1...Sc3!
    • 1.Qa6?
      • threat
        • 2.Rc3#
        • 2.Rxc5#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Sb4
        • 2.Rc3#
      • 1...Sa5
        • 2.Rc3#
        • 2.Qd6#
      • 1...g6+!
  • Keys
    • 1.Ke5!
      • threat
        • 2.Re1#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Be2
        • 2.Red4#
      • 1...Sd6
        • 2.Qxd6#
      • 1...f2
        • 2.Red4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(c);N_GUARD::R1(C)
    • S(c);N_GUARD::R1(C),XS(c)
    • S(j);N_GUARD::QAR(H)
    • S(j);CHECK,N_GUARD::QAR(H),XS(j)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • S(c);N_GUARD::R1(C),XS(c)
        • S(j);N_GUARD::QAR(H),XS(j)
      • Refutation
        • P(e);
    • Try
      • K(F);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(j);CHECK,OGATE::PXS(j)=Q
        • S(c);N_GUARD::R1(C),XS(c)
        • P(e);::QAB(H)+R(D),DCHECK
      • Refutation
        • S(j);
    • Try
      • R(C);XP(h)
      • Threat
        • QAB(H)
      • Vars
        • S(j);CHECK,N_GUARD::QAR(H),XS(j)
        • S(c);N_GUARD::R1(C),XS(c)
        • S(c);N_GUARD::R1(C)
        • S(j);N_GUARD::QAR(H)
      • Refutation
        • S(j);XR(C)
    • Try
      • R(D);
      • Threat
        • DUALS(3)
      • Vars
        • S(j);CHECK,N_GUARD::QAR(H),XS(j)
        • P(e);::R(D)
      • Refutation
        • S(c);
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(j);CHECK,N_GUARD::QAR(H),XS(j)
        • S(c);::QAB(H)+R(C),DCHECK,XS(c)
        • S(c);::QAB(H)+R(C),DCHECK
      • Refutation
        • P(k);CHECK
  • Actual
    • K(F);P-FLIGHT
    • Threat
      • QAB(H)+R(D)
    • Vars
      • S(c);N_GUARD::R1(C),XS(c)
      • B(a);SBLOCK::QAB(H)+R(D),DCHECK
      • S(j);N_GUARD::QAR(H),XS(j)
      • P(e);::QAB(H)+R(D),DCHECK
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