MESON Chess Problem Database

Problem Display
PID: 89940 (3B2n1/3p2Q1/2pP2pq/5k2/2B1N1R1/2p1p1pP/3PnpN1/2b2K2 w - - 0 1)

Markovtsy, Vassyl Yuriovich

Die Schwalbe, 1997

3B2n1/3p2Q1/2pP2pq/5k2/2B1N1R1/2p1p1pP/3PnpN1/2b2K2

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Sxe3#
      • 2.Sxh4#
    • 1...Qh5
      • 2.Sxe3#
    • 1...Qh7
      • 2.Sxe3#
    • 1...Qh8
      • 2.Sxe3#
    • 1...Sg1
      • 2.Sxg3#
    • 1...Sd4
      • 2.Sxg3#
    • 1...Sf4
      • 2.Sxg3#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Se7
      • 2.Qf6#
    • 1...g5
      • 2.Sxe3#
  • Tries
    • 1.Bf6?
      • threat
        • 2.Qxd7#
      • 1...Qxg7
        • 2.Sxe3#
        • 2.Sh4#
      • 1...Sxf6
        • 2.Qxf6#
      • 1...Qf4
        • 2.Qxg6#
      • 1...Sf4
        • 2.Sxg3#
      • 1...Qh7
        • 2.Sxe3#
      • 1...Sd4
        • 2.Sxg3#
      • 1...g5
        • 2.Sxe3#
      • 1...Se7!
    • 1.Rf4+?
      • 1...Sxf4
        • 2.Sxg3#
      • 1...Qxf4!
    • 1.Qf7+?
      • 1...Sf6
        • 2.Qxf6#
      • 1...Ke5!
    • 1.d4?
      • threat
        • 2.Qe5#
        • 2.Qxd7#
      • 1...Qxg7
        • 2.Sh4#
      • 1...Qxh3
        • 2.Qxg6#
        • 2.Qxd7#
      • 1...Sxd4
        • 2.Sxg3#
      • 1...Qf4
        • 2.Qxg6#
      • 1...Sf4
        • 2.Sxg3#
        • 2.Qe5#
      • 1...Qh7
        • 2.Qe5#
      • 1...Qh8
        • 2.Qxg6#
        • 2.Qxd7#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Se7
        • 2.Qe5#
        • 2.Qf6#
        • 2.Qf7#
      • 1...g5!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Bd3#
      • 1...Qxg7
        • 2.Rg5#
      • 1...Qxh3
        • 2.Rg5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Qf4
        • 2.Sh4#
      • 1...Sf4
        • 2.Sxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(j);N_GUARD::S(C),XP(e)
    • S(b);N_GUARD::S(F),XP(f)
    • S(l);N_GUARD::QAR1(I),XS(l)
    • S(l);N_GUARD::QAR1(I)
    • P(i);S_CUTQ(j)::S(C),XP(e)
  • Tries
    • Try
      • B(J);
      • Threat
        • QAB(I),XP(k)
      • Vars
        • S(l);OGATE,XB(J)::QAR1(I),XS(l)
        • Q(j);N_GUARD::QAB1(I),XP(i)
        • S(b);N_GUARD::S(F),XP(f)
        • Q(j);N_GUARD::S(C),XP(e)
        • P(i);S_CUTQ(j)::S(C),XP(e)
      • Refutation
        • S(l);
    • Try
      • R(G);CHECK
      • Vars
        • S(b);XR(G)::S(F),XP(f)
      • Refutation
        • Q(j);XR(G)
    • Try
      • Q(I);CHECK
      • Vars
        • S(l);N_GUARD,P_SPINS(l)::QAR1(I),XS(l)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);N_GUARD,XQ(I)::S(C)
        • S(b);N_GUARD,XP(B)::S(F),XP(f)
        • Q(j);N_GUARD::QAB1(I),XP(i)
        • Q(j);::QAR1(I)
        • S(l);N_GUARD::QAR1(I),XS(l)
      • Refutation
        • P(i);
  • Actual
    • S(F);
    • Threat
      • B(E)
    • Vars
      • Q(j);N_GUARD,XQ(I)::R1(G)
      • Q(j);N_GUARD,P_PINS(C),XP(D)::R1(G)
      • S(l);N_GUARD::QAR1(I),XS(l)
      • Q(j);N_GUARD::S(C)
      • S(b);S_CUTQ(j)::S(C),XP(e)
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