MESON Chess Problem Database

Problem Display
PID: 254915 (4N1n1/4P2Q/3B4/K4Nr1/R1BPk1P1/2P1pn2/3rp1P1/1b1R4 w - - 0 1)

Andreev, Viacheslav Nikolai

Zadachi i Etyudi, 2006

4N1n1/4P2Q/3B4/K4Nr1/R1BPk1P1/2P1pn2/3rp1P1/1b1R4

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg4
      • 2.Sg3#
    • 1...Rxf5+
      • 2.Qxf5#
    • 1...Rg6
      • 2.Sg3#
    • 1...Rg7
      • 2.Sg3#
      • 2.Sfxg7#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sh6
      • 2.Sf6#
    • 1...Sxe7
      • 2.Sf6#
  • Tries
    • 1.Ka6?
      • threat
        • 2.Sg3#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Se5!
    • 1.Bg3?
      • threat
        • 2.Sd6#
      • 1...Rxf5+
        • 2.Qxf5#
      • 1...Rg6
        • 2.Sfd6#
      • 1...Rxd4!
    • 1.d5?
      • threat
        • 2.Sg3#
      • 1...Rxd5+
        • 2.Bxd5#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Se5!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qd5#
      • 1...Rxf5+
        • 2.Qxf5#
      • 1...Rxd4
        • 2.Bd5#
      • 1...Sxe7
        • 2.Sf6#
      • 1...Se5
        • 2.Sg3#
      • 1...Sf6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(g);N_PINS(I),XP(G)::QAB(L)+S(I),DCHECK
    • R(g);CHECK,OGATE,P_SPINR(g),XS(I)::QAB1(L),XR(g)
    • R(g);N_PINS(I)::S(I)
    • S(h);N_GUARD::S(M),XS(h)
    • S(h);N_GUARD::S(M)
    • S(h);N_GUARD,XP(K)::S(M)
  • Tries
    • Try
      • K(H);N_SPINS(I),P-FLIGHT
      • Threat
        • QAB(L)+S(I),DCHECK
      • Vars
        • R(g);OGATE,P_SPINR(g),XS(I)::QAB1(L),XR(g)
      • Refutation
        • S(e);
    • Try
      • B(J);
      • Threat
        • S(M)
      • Vars
        • R(g);CHECK,OGATE,P_SPINR(g),XS(I)::QAB1(L),XR(g)
        • R(g);N_PINS(I)::S(I)
      • Refutation
        • R(b);XP(F)
    • Try
      • P(F);N_SPINS(I)
      • Threat
        • QAB(L)+S(I),DCHECK
      • Vars
        • R(b);CHECK,OGATE,XP(F)::R(D)+B(E),DCHECK,XR(b)
        • R(g);OGATE,P_PINP(F),P_SPINR(g),XS(I)::QAB1(L),XR(g)
      • Refutation
        • S(e);
  • Actual
    • Q(L);
    • Threat
      • QAB1(L)
    • Vars
      • R(g);CHECK,OGATE,XS(I)::QAB1(L),XR(g)
      • R(b);XP(F)::B(E)
      • S(h);N_GUARD,XP(K)::S(M)
      • S(e);N_PINS(I)::S(I)
      • S(h);N_GUARD::S(M),XS(h)
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