MESON Chess Problem Database

Problem Display
PID: 155886 (1n2B3/1r1P1P1n/1P1kPP2/2RqR3/2pPp3/3Q4/1N6/6K1 w - - 0 1)

Dyachuk, Vasyl Vasilovich

1st Prize, Problem-Forum, 2011

1n2B3/1r1P1P1n/1P1kPP2/2RqR3/2pPp3/3Q4/1N6/6K1

#2

12 + 7

23 Die Schwalbe 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Sxc4#
    • 1...Qxd4+
      • 2.Qxd4#
    • 1...Sg5
      • 2.f8Q#
      • 2.f8B#
    • 1...Sxf6
      • 2.f8Q#
      • 2.f8B#
    • 1...Sc6
      • 2.Rcxd5#
  • Tries
    • 1.Qxc4?
      • threat
        • 2.Rcxd5#
        • 2.Qxd5#
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Qxc4
        • 2.Sxc4#
      • 1...Qxe6
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Qxc5
        • 2.Qxc5#
      • 1...Qxe5
        • 2.dxe5#
      • 1...Sxf6
        • 2.f8Q#
        • 2.f8B#
      • 1...Qc6!
    • 1.d8Q+?
      • 1...Sd7
        • 2.Qe7#
      • 1...Rd7!
    • 1.d8S?
      • threat
        • 2.Rcxd5#
        • 2.Rexd5#
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Qxe6
        • 2.Sxb7#
        • 2.Rxe6#
      • 1...Qxc5
        • 2.Sxb7#
      • 1...Qxe5
        • 2.Sxc4#
      • 1...Rxb6
        • 2.Rexd5#
      • 1...Qc6
        • 2.Sxc4#
      • 1...Sxf6!
  • Keys
    • 1.Qxe4!
      • threat
        • 2.Rexd5#
        • 2.Qxd5#
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Qxe4
        • 2.Sxc4#
      • 1...Qxe6
        • 2.Rxe6#
      • 1...Qxc5
        • 2.dxc5#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Sxf6
        • 2.f8Q#
        • 2.f8B#
      • 1...Qc6
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_GUARD::S(B),XP(a)
    • Q(c);CHECK,OGATE,P_SPINQ(c),XP(D)::QAR2(C),XQ(c)
    • S(f);N_GUARD::P=Q
    • S(f);N_GUARD,XP(I)::P=Q
    • S(g);SBLOCK::R1(E),XQ(c)
  • Tries
    • Try
      • Q(C);XP(a)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATE,XP(D)::QAR2(C),XQ(c)
        • Q(c);XQ(C)::S(B),XQ(c)
        • Q(c);OGATE,P_PINP(D),XR(E)::QAB1(C),XQ(c)
        • Q(c);OGATE,XR(F)::P(D),XQ(c)
        • S(f);N_GUARD,XP(I)::P=Q
      • Refutation
        • Q(c);
    • Try
      • P(J);CHECK
      • Vars
        • S(g);P_SPINS(g),S_CUTR(e)::QAB1(J)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • P(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,OGATE,P_SPINQ(c),XP(D)::QAR2(C),XQ(c)
        • Q(c);N_GUARD,P_PINP(D),XR(E)::S(J),XR(e)
        • Q(c);N_GUARD,XR(F)::S(B),XP(a)
        • R(e);XP(G)::R1(F),XQ(c)
        • Q(c);N_GUARD::S(B),XP(a)
      • Refutation
        • S(f);XP(I)
  • Actual
    • Q(C);XP(b)
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);CHECK,OGATE,XP(D)::QAR2(C),XQ(c)
      • Q(c);N_GUARD,XQ(C)::S(B),XP(a)
      • Q(c);OGATE,XP(H)::R1(F),XQ(c)
      • Q(c);OGATE,P_PINP(D),XR(E)::P(D),XQ(c)
      • Q(c);OGATE,XR(F)::QAB1(C),XQ(c)
      • S(f);N_GUARD,XP(I)::P=Q
      • Q(c);N_GUARD::S(B),XP(a)
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